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NSR database version of April 29, 2024.

Search: Author = S.Sirca

Found 67 matches.

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2024SA20      Phys.Rev.Lett. 132, 162501 (2024)

S.N.Santiesteban, S.Li, D.Abrams, S.Alsalmi, D.Androic, K.Aniol, J.Arrington, T.Averett, C.Ayerbe Gayoso, J.Bane, S.Barcus, J.Barrow, A.Beck, V.Bellini, H.Bhatt, D.Bhetuwal, D.Biswas, A.Camsonne, J.Castellanos, J.Chen, J.-P.Chen, D.Chrisman, M.E.Christy, C.Clarke, S.Covrig, R.Cruz-Torres, D.Day, D.Dutta, E.Fuchey, C.Gal, F.Garibaldi, T.N.Gautam, T.Gogami, J.Gomez, P.Gueye, T.J.Hague, J.O.Hansen, F.Hauenstein, W.Henry, D.W.Higinbotham, R.J.Holt, C.Hyde, K.Itabashi, M.Kaneta, A.Karki, A.T.Katramatou, C.E.Keppel, P.M.King, L.Kurbany, T.Kutz, N.Lashley-Colthirst, W.B.Li, H.Liu, N.Liyanage, E.Long, A.Lovato, J.Mammei, P.Markowitz, R.E.McClellan, F.Meddi, D.Meekins, R.Michaels, M.Mihovilovic, A.Moyer, S.Nagao, D.Nguyen, M.Nycz, M.Olson, L.Ou, V.Owen, C.Palatchi, B.Pandey, A.Papadopoulou, S.Park, T.Petkovic, S.Premathilake, V.Punjabi, R.D.Ransome, P.E.Reimer, J.Reinhold, S.Riordan, N.Rocco, V.M.Rodriguez, A.Schmidt, B.Schmookler, E.P.Segarra, A.Shahinyan, S.Sirca, K.Slifer, P.Solvignon, T.Su, R.Suleiman, L.Tang, Y.Tian, W.Tireman, F.Tortorici, Y.Toyama, K.Uehara, G.M.Urciuoli, D.Votaw, J.Williamson, B.Wojtsekhowski, S.Wood, Z.H.Ye, J.Zhang, X.Zheng

Novel Measurement of the Neutron Magnetic Form Factor from A=3 Mirror Nuclei

NUCLEAR REACTIONS ³H, ³He(e^-, e^-), E=2.222, 4.323 GeV; measured reaction products; deduced σ(θ, E), the neutron magnetic form factor using quasielastic scattering from the mirror nuclei. Comparison with available data. Hall A at Jefferson Lab (JLab).

doi: 10.1103/PhysRevLett.132.162501
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2023KE04      Phys.Rev.Lett. 130, 152502 (2023)

S.Kegel, P.Achenbach, S.Bacca, N.Barnea, J.Bericic, D.Bosnar, L.Correa, M.O.Distler, A.Esser, H.Fonvieille, I.Friscic, M.Heilig, P.Herrmann, M.Hoek, P.Klag, T.Kolar, W.Leidemann, H.Merkel, M.Mihovilovic, J.Muller, U.Muller, G.Orlandini, J.Pochodzalla, B.S.Schlimme, M.Schoth, F.Schulz, C.Sfienti, S.Sirca, R.Spreckels, Y.Stottinger, M.Thiel, A.Tyukin, T.Walcher, A.Weber

Measurement of the α-Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces?

NUCLEAR REACTIONS ⁴He(e^-, e^-'), E=450, 690, 795 MeV; measured reaction products; deduced missing mass spectrum, monopole transition form factor, resonance parameters, modern nuclear forces, including those derived within chiral effective field theory fail to reproduce the excitation of the α particle. The Mainz Microtron MAMI.

doi: 10.1103/PhysRevLett.130.152502
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2023MI19      Eur.Phys.J. A 59, 225 (2023)

M.Mihovilovic, P.Achenbach, C.Ayerbe Gayoso, M.Bajec, T.Beranek, J.Bericic, J.C.Bernauer, R.Bohm, D.Bosnar, M.Cardinali, L.Correa, L.Debenjak, A.Denig, M.O.Distler, A.Esser, M.I.Ferretti-Bondy, H.Fonvieille, J.M.Friedrich, I.Friscic, K.Griffioen, M.Hoek, S.Kegel, Y.Stottinger, H.Merkel, D.G.Middleton, U.Muller, L.Nungesser, J.Pochodzalla, M.Rohrbeck, S.Sanchez Majos, B.S.Schlimme, M.Schoth, F.Schulz, C.Sfienti, S.Sirca, J.E.Sobczyk, S.Stajner, M.Thiel, A.Tyukin, M.Vanderhaeghen, A.B.Weber, M.Weinriefer

Non-forward radiative corrections to electron-carbon scattering

doi: 10.1140/epja/s10050-023-01128-y
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2022GO09      Eur.Phys.J. A 58, 116 (2022)

B.Golli, H.Osmanovic, S.Sirca

The Λ(1405) resonance as a genuine three-quark or molecular state

doi: 10.1140/epja/s10050-022-00767-x
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2022ST04      Phys.Rev. C 105, 045202 (2022)

I.Strakovsky, S.Sirca, W.J.Briscoe, A.Deur, A.Schmidt, R.L.Workman

Single-pion contribution to the Gerasimov-Drell-Hearn sum rule and related integrals

NUCLEAR REACTIONS ¹H(γ, X), (γ, nπ⁺), (γ, pπ⁰), N(γ, X), (γ, nπ⁰), (γ, pπ^-), E=150-2000 MeV; analyzed experimental and theoretical data on σ, differences of total σ for the helicity states 3/2 and 1/2; deduced Gerasimov-Drell-Hearn (GDH), Baldin, and Gell-Mann–Goldberger–Thirring (GGT) sum rules, contribution of the single-pion photoproduction off the nucleon to the sum-rules to these sum rules.

doi: 10.1103/PhysRevC.105.045202
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2022SU03      Prog.Theor.Exp.Phys. 2022, 013D01 (2022)

K.N.Suzuki, T.Gogami, B.Pandey, K.Itabashi, S.Nagao, K.Okuyama, S.N.Nakamura, L.Tang, D.Abrams, T.Akiyama, D.Androic, K.Aniol, C.Ayerbe Gayoso, J.Bane, S.Barcus, J.Barrow, V.Bellini, H.Bhatt, D.Bhetuwal, D.Biswas, A.Camsonne, J.Castellanos, J.-P.Chen, J.Chen, S.Covrig, D.Chrisman, R.Cruz-Torres, R.Das, E.Fuchey, K.Gnanvo, F.Garibaldi, T.Gautam, J.Gomez, P.Gueye, T.J.Hague, O.Hansen, W.Henry, F.Hauenstein, D.W.Higinbotham, C.E.Hyde, M.Kaneta, C.Keppel, T.Kutz, N.Lashley-Colthirst, S.Li, H.Liu, J.Mammei, P.Markowitz, R.E.McClellan, F.Meddi, D.Meekins, R.Michaels, M.Mihovilovic, A.Moyer, D.Nguyen, M.Nycz, V.Owen, C.Palatchi, S.Park, T.Petkovic, S.Premathilake, P.E.Reimer, J.Reinhold, S.Riordan, V.Rodriguez, C.Samanta, S.N.Santiesteban, B.Sawatzky, S.Sirca, K.Slifer, T.Su, Y.Tian, Y.Toyama, K.Uehara, G.M.Urciuoli, D.Votaw, J.Williamson, B.Wojtsekhowski, S.A.Wood, B.Yale, Z.Ye, J.Zhang, X.Zheng

The cross-section measurement for the ³H(e, e'K⁺)nnΛ reaction

NUCLEAR REACTIONS ³H(e^-, e^-'K⁺), E not given; measured reaction products; deduced σ(θ), missing mass. Comparison with Monte Carlo simulations.

doi: 10.1093/ptep/ptab158
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2021AC08      Eur.Phys.J. A 57, 261 (2021)

A.Accardi, A.Afanasev, I.Albayrak, S.F.Ali, M.Amaryan, J.R.M.Annand, J.Arrington, A.Asaturyan, H.Atac, H.Avakian, T.Averett, C.Ayerbe Gayoso, X.Bai, L.Barion, M.Battaglieri, V.Bellini, R.Beminiwattha, F.Benmokhtar, V.V.Berdnikov, J.C.Bernauer, V.Bertone, A.Bianconi, A.Biselli, P.Bisio, P.Blunden, M.Boer, M.Bondi, K.-T.Brinkmann, W.J.Briscoe, V.Burkert, T.Cao, A.Camsonne, R.Capobianco, L.Cardman, M.Carmignotto, M.Caudron, L.Causse, A.Celentano, P.Chatagnon, J.-P.Chen, T.Chetry, G.Ciullo, E.Cline, P.L.Cole, M.Contalbrigo, G.Costantini, A.D'Angelo, L.Darme, D.Day, M.Defurne, M.De Napoli, A.Deur, R.De Vita, N.D'Hose, S.Diehl, M.Diefenthaler, B.Dongwi, R.Dupre, H.Dutrieux, D.Dutta, M.Ehrhart, L.El Fassi, L.Elouadrhiri, R.Ent, J.Erler, I.P.Fernando, A.Filippi, D.Flay, T.Forest, E.Fuchey, S.Fucini, Y.Furletova, H.Gao, D.Gaskell, A.Gasparian, T.Gautam, F.-X.Girod, K.Gnanvo, J.Grames, G.N.Grauvogel, P.Gueye, M.Guidal, S.Habet, T.J.Hague, D.J.Hamilton, O.Hansen, D.Hasell, M.Hattawy, D.W.Higinbotham, A.Hobart, T.Horn, C.E.Hyde, H.Ibrahim, A.Ilyichev, A.Italiano, K.Joo, S.J.Joosten, V.Khachatryan, N.Kalantarians, G.Kalicy, B.Karky, D.Keller, C.Keppel, M.Kerver, M.Khandaker, A.Kim, J.Kim, P.M.King, E.Kinney, V.Klimenko, H.-S.Ko, M.Kohl, V.Kozhuharov, B.T.Kriesten, G.Krnjaic, V.Kubarovsky, T.Kutz, L.Lanza, M.Leali, P.Lenisa, N.Liyanage, Q.Liu, S.Liuti, J.Mammei, S.Mantry, D.Marchand, P.Markowitz, L.Marsicano, V.Mascagna, M.Mazouz, M.McCaughan, B.McKinnon, D.McNulty, W.Melnitchouk, A.Metz, Z.-E.Meziani, S.Migliorati, M.Mihovilovic, R.Milner, A.Mkrtchyan, H.Mkrtchyan, A.Movsisyan, H.Moutarde, M.Muhoza, C.Munoz Camacho, J.Murphy, P.Nadel-Turonski, E.Nardi, J.Nazeer, S.Niccolai, G.Niculescu, R.Novotny, J.F.Owens, M.Paolone, L.Pappalardo, R.Paremuzyan, B.Pasquini, E.Pasyuk, T.Patel, I.Pegg, C.Peng, D.Perera, M.Poelker, K.Price, A.J.R.Puckett, M.Raggi, N.Randazzo, M.N.H.Rashad, M.Rathnayake, B.Raue, P.E.Reimer, M.Rinaldi, A.Rizzo, Y.Roblin, J.Roche, O.Rondon-Aramayo, F.Sabatie, G.Salme, E.Santopinto, R.Santos Estrada, B.Sawatzky, A.Schmidt, P.Schweitzer, S.Scopetta, V.Sergeyeva, M.Shabestari, A.Shahinyan, Y.Sharabian, S.Sirca, E.S.Smith, D.Sokhan, A.Somov, N.Sparveris, M.Spata, H.Spiesberger, M.Spreafico, S.Stepanyan, P.Stoler, I.Strakovsky, R.Suleiman, M.Suresh, P.Sznajder, H.Szumila-Vance, V.Tadevosyan, A.S.Tadepalli, A.W.Thomas, M.Tiefenback, R.Trotta, M.Ungaro, P.Valente, M.Vanderhaeghen, L.Venturelli, H.Voskanyan, E.Voutier, B.Wojtsekhowski, M.H.Wood, S.Wood, J.Xie, W.Xiong, Z.Ye, M.Yurov, H.-G.Zaunick, S.Zhamkochyan, J.Zhang, S.Zhang, S.Zhao, Z.W.Zhao, X.Zheng, J.Zhou, C.Zorn

An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab

doi: 10.1140/epja/s10050-021-00564-y
Citations: PlumX Metrics

2021AF03      Eur.Phys.J. A 57, 300 (2021)

A.Afanasev, I.Albayrak, S.Ali, M.Amaryan, J.R.M.Annand, A.Asaturyan, V.Bellini, V.V.Berdnikov, M.Boer, K.Brinkmann, W.J.Briscoe, A.Camsonne, M.Caudron, L.Causse, M.Carmignotto, D.Day, M.Defurne, S.Diehl, R.Ent, P.Chatagnon, R.Dupre, D.Dutta, M.Ehrhart, M.A.I.Fernando, T.Forest, M.Guidal, J.Grames, P.Gueye, S.Habet, D.J.Hamilton, A.Hobart, T.Horn, C.Hyde, G.Kalicy, D.Keller, C.Keppel, M.Kerver, E.Kinney, H.-S.Ko, D.Marchand, P.Markowitze, M.Mazouz, M.McCaughan, B.McKinnon, A.Mkrtchyan, H.Mkrtchyan, M.Muhoza, C.Munoz Camacho, J.Murphy, P.Nadel-Turonski, S.Niccolai, G.Niculescu, R.Novotny, R.Paremuzyan, I.Pegg, K.Price, H.Rashad, J.Roche, R.Rondon, B.Sawatzky, V.Sergeyeva, S.Sirca, A.Somov, I.Strakovsky, V.Tadevosyan, R.Trotta, H.Voskanyan, E.Voutier, B.Wojtsekhowski, S.Wood, S.Zhamkochyan, J.Zhang, S.Zhao, C.Zorn

Deeply virtual Compton scattering using a positron beam in Hall-C at Jefferson Lab

doi: 10.1140/epja/s10050-021-00581-x
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2021MI08      Eur.Phys.J. A 57, 107 (2021)

M.Mihovilovic, P.Achenbach, T.Beranek, J.Bericic, J.C.Bernauer, R.Bohm, D.Bosnar, M.Cardinali, L.Correa, L.Debenjak, A.Denig, M.O.Distler, A.Esser, M.I.Ferretti-Bondy, H.Fonvieille, J.M.Friedrich, I.Friscic, M.Hoek, S.Kegel, H.Merkel, D.G.Middleton, U.Muller, J.Pochodzalla, B.S.Schlimme, M.Schoth, F.Schulz, C.Sfienti, S.Sirca, S.Stajner, Y.Stottinger, M.Thiel, A.Tyukin, M.Vanderhaeghen, A.B.Weber

The proton charge radius extracted from the initial-state radiation experiment at MAMI

NUCLEAR REACTIONS ¹H(e^-, e^-), E not given; analyzed available data; deduced proton charge radii. Comparison with available data.

doi: 10.1140/epja/s10050-021-00414-x
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2021SU25      Nat.Phys. 17, 687 (2021), Erratum Nat.Phys. 18, 473 (2022)

V.Sulkosky, C.Peng, J.Chen, A.Deur, S.Abrahamyan, K.A.Aniol, D.S.Armstrong, T.Averett, S.L.Bailey, A.Beck, P.Bertin, F.Butaru, W.Boeglin, A.Camsonne, G.D.Cates, C.-C.Chang, S.Choi, E.Chudakov, L.Coman, J.C.Cornejo, B.Craver, F.Cusanno, R.De Leo, C.W.de Jager, J.D.Denton, S.Dhamija, R.Feuerbach, J.M.Finn, S.Frullani, K.Fuoti, H.Gao, F.Garibaldi, O.Gayou, R.Gilman, A.Glamazdin, C.Glashausser, J.Gomez, J.-O.Hansen, D.Hayes, F.W.Hersman, D.W.Higinbotham, T.Holmstrom, T.B.Humensky, C.E.Hyde, H.Ibrahim, M.Iodice, X.Jiang, L.J.Kaufman, A.Kelleher, K.E.Keister, W.Kim, A.Kolarkar, N.Kolb, W.Korsch, K.Kramer, G.Kumbartzki, L.Lagamba, V.Laine, G.Laveissiere, J.J.Lerose, D.Lhuillier, R.Lindgren, N.Liyanage, H.-J.Lu, B.Ma, D.J.Margaziotis, P.Markowitz, K.R.McCormick, M.Meziane, Z.-E.Meziani, R.Michaels, B.Moffit, P.Monaghan, S.Nanda, J.Niedziela, M.Niskin, R.Pandolfi, K.D.Paschke, M.Potokar, A.Puckett, V.A.Punjabi, Y.Qiang, R.D.Ransome, B.Reitz, R.Roche, A.Saha, A.Shabetai, S.Sirca, J.T.Singh, K.Slifer, R.Snyder, P.Solvignon, R.Stringer, R.Subedi, W.A.Tobias, N.Ton, P.E.Ulmer, G.M.Urciuoli, A.Vacheret, E.Voutier, K.Wang, L.Wan, B.Wojtsekhowski, S.Woo, H.Yao, J.Yuan, X.Zhan, X.Zheng, L.Zhu

Measurement of the generalized spin polarizabilities of the neutron in the low-Q² region

NUCLEAR REACTIONS ³He(polarized e^-, e^-), E=1.1-4.4 GeV; measured reaction products, Eβ, Iβ. ¹NN; deduced transverse-transverse and longitudinal-transverse interference σ, generalized neutron spin polarizabilities. Comparison with chiral effective field theory calculations.

doi: 10.1038/s41567-021-01245-9
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2019BL09      Eur.Phys.J. A 55, 182 (2019)

A.Blomberg, H.Atac, N.Sparveris, M.Paolone, P.Achenbach, M.Benali, J.Bericic, R.Bohm, L.Correa, M.O.Distler, A.Esser, D.Flay, H.Fonvieille, I.Friscic, Y.Kohl, H.Merkel, U.Muller, Z.E.Meziani, M.Mihovilovic, J.Pochodzalla, A.Polychronopoulou, B.Pasquini, M.Schoth, F.Schulz, S.Schlimme, C.Sfienti, S.Sirca, A.Weber

Virtual Compton scattering measurements in the nucleon resonance region

doi: 10.1140/epja/i2019-12877-0
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2019GO21      Phys.Rev. C 100, 035204 (2019)

B.Golli, H.Osmanovic, S.Sirca

Dynamical generation of resonances in the P33 partial wave

NUCLEAR REACTIONS ¹H, ¹n(π, π)p, (π, π)n, (γ, π)p, (γ, π)n, E^*=1080-1900 MeV; analyzed evolution of resonance poles in complex energy plane; calculated helicity and electroproduction amplitudes.

doi: 10.1103/PhysRevC.100.035204
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2018ES03      Phys.Rev.Lett. 121, 022503 (2018)

A.Esser, M.Thiel, P.Achenbach, K.Aulenbacher, S.Baunack, J.Berscic, D.Bosnar, L.Correa, M.Dehn, M.O.Distler, H.Fonvieille, I.Fricic, M.Gorchtein, S.Heidrich, P.Herrmann, M.Hoek, S.Kegel, Y.Kohl, T.Kolar, H.-J.Kreidel, F.E.Maas, H.Merkel, M.Mihovilovic, J.Muller, U.Muller, F.Nillius, C.Palatchi, K.D.Paschke, J.Pochodzalla, B.S.Schlimme, M.Schoth, F.Schulz, S.Sirca, B.Spruck, S.Stajner, V.Tioukine, A.Tyukin, A.Weber, C.Sfienti

First Measurement of the Q² Dependence of the Beam-Normal Single Spin Asymmetry for Elastic Scattering off Carbon

NUCLEAR REACTIONS ¹²C(polarized E, E), E=570 MeV; measured reaction products, Eβ, Iβ; deduced Q² dependence of the beam-normal single spin asymmetry.

doi: 10.1103/PhysRevLett.121.022503
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2018GO05      Phys.Rev. C 97, 035204 (2018)

B.Golli, H.Osmanovic, S.Sirca, A.Svarc

Genuine quark state versus dynamically generated structure for the Roper resonance

doi: 10.1103/PhysRevC.97.035204
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2017PU05      Phys.Rev. C 96, 055203 (2017); Erratum Phys.Rev. C 98, 019907 (2018)

A.J.R.Puckett, E.J.Brash, M.K.Jones, W.Luo, M.Meziane, L.Pentchev, C.F.Perdrisat, V.Punjabi, F.R.Wesselmann, A.Afanasev, A.Ahmidouch, I.Albayrak, K.A.Aniol, J.Arrington, A.Asaturyan, H.Baghdasaryan, F.Benmokhtar, W.Bertozzi, L.Bimbot, P.Bosted, W.Boeglin, C.Butuceanu, P.Carter, S.Chernenko, M.E.Christy, M.Commisso, J.C.Cornejo, S.Covrig, S.Danagoulian, A.Daniel, A.Davidenko, D.Day, S.Dhamija, D.Dutta, R.Ent, S.Frullani, H.Fenker, E.Frlez, F.Garibaldi, D.Gaskell, S.Gilad, R.Gilman, Y.Goncharenko, K.Hafidi, D.Hamilton, D.W.Higinbotham, W.Hinton, T.Horn, B.Hu, J.Huang, G.M.Huber, E.Jensen, C.Keppel, M.Khandaker, P.King, D.Kirillov, M.Kohl, V.Kravtsov, G.Kumbartzki, Y.Li, V.Mamyan, D.J.Margaziotis, A.Marsh, Y.Matulenko, J.Maxwell, G.Mbianda, D.Meekins, Y.Melnik, J.Miller, A.Mkrtchyan, H.Mkrtchyan, B.Moffit, O.Moreno, J.Mulholland, A.Narayan, S.Nedev, Nuruzzaman, E.Piasetzky, W.Pierce, N.M.Piskunov, Y.Prok, R.D.Ransome, D.S.Razin, P.Reimer, J.Reinhold, O.Rondon, M.Shabestari, A.Shahinyan, K.Shestermanov, S.Sirca, I.Sitnik, L.Smykov, G.Smith, L.Solovyev, P.Solvignon, R.Subedi, E.Tomasi-Gustafsson, A.Vasiliev, M.Veilleux, B.B.Wojtsekhowski, S.Wood, Z.Ye, Y.Zanevsky, X.Zhang, Y.Zhang, X.Zheng, L.Zhu

Polarization transfer observables in elastic electron-proton scattering at Q² = 2.5, 5.2, 6.8, and 8.5 GeV²

NUCLEAR REACTIONS ¹H(polarized e, e)p, E<5.717 GeV; measured elastically scattered electrons by a large-solid-angle electromagnetic calorimeter (BigCal) in coincidence with the scattered protons, polarization of recoiling protons by focal plane polarimeter (FPP), proton angular distributions and azimuthal asymmetries, focal-plane helicity difference/sum ratio asymmetry, analyzing powers at JLab's Continuous Electron Beam Accelerator Facility (CEBAF); deduced ratio of the proton's electric and magnetic form factors μ_pG_p^E/G_p^M. Comparison with other experimental data, and with theoretical predictions.

doi: 10.1103/PhysRevC.96.055203
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2017YA13      Phys.Lett. B 769, 21 (2017)

I.Yaron, D.Izraeli, P.Achenbach, H.Arenhovel, J.Bericic, R.Bohm, D.Bosnar, E.O.Cohen, L.Debenjak, M.O.Distler, A.Esser, I.Friscic, R.Gilman, I.Korover, J.Lichtenstadt, H.Merkel, D.G.Middleton, M.Mihovilovic, U.Muller, E.Piasetzky, J.Pochodzalla, G.Ron, B.S.Schlimme, M.Schoth, F.Schulz, C.Sfienti, S.Sirca, S.Strauch, M.Thiel, A.Tyukin, A.Webe

Polarization-transfer measurement to a large-virtuality bound proton in the deuteron

NUCLEAR REACTIONS ²H(polarized E, E'polarized p), E=600, 630 MeV; measured reaction products; deduced helicity dependent polarization components. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2017.01.034
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2016GO27      Eur.Phys.J. A 52, 279 (2016)

B.Golli, S.Sirca

Eta and kaon production in a chiral quark model

NUCLEAR REACTIONS ¹n, ¹H(γ, η), E=1480-1770 MeV;¹H(γ, K⁺)Λ, E=1610-1820 MeV;¹H(γ, K⁰)Σ⁺, E=1685-1770 MeV; calculated total σ using CC formalism with quasi-bound quark-model states; deduced quark-model explanation of 1685 MeV resonance in the ηn channel. Compared with available data.

doi: 10.1140/epja/i2016-16279-6
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2014BE19      Phys.Rev. C 90, 015206 (2014)

J.C.Bernauer, M.O.Distler, J.Friedrich, Th.Walcher, P.Achenbach, C.Ayerbe Gayoso, R.Bohm, D.Bosnar, L.Debenjak, L.Doria, A.Esser, H.Fonvieille, M.Gomez Rodriguez, J.M.Friedrich, M.Makek, H.Merkel, D.G.Middleton, U.Muller, L.Nungesser, J.Pochodzalla, M.Potokar, S.Sanchez Majos, B.S.Schlimme, S.Sirca, M.Weinriefer

Electric and magnetic form factors of the proton

doi: 10.1103/PhysRevC.90.015206
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2014KA30      Phys.Rev.Lett. 113, 022502 (2014)

J.Katich, X.Qian, Y.X.Zhao, K.Allada, K.Aniol, J.R.M.Annand, T.Averett, F.Benmokhtar, W.Bertozzi, P.C.Bradshaw, P.Bosted, A.Camsonne, M.Canan, G.D.Cates, C.Chen, J.-P.Chen, W.Chen, K.Chirapatpimol, E.Chudakov, E.Cisbani, J.C.Cornejo, F.Cusanno, M.M.Dalton, W.Deconinck, C.W.de Jager, R.De Leo, X.Deng, A.Deur, H.Ding, P.A.M.Dolph, C.Dutta, D.Dutta, L.El Fassi, S.Frullani, H.Gao, F.Garibaldi, D.Gaskell, S.Gilad, R.Gilman, O.Glamazdin, S.Golge, L.Guo, D.Hamilton, O.Hansen, D.W.Higinbotham, T.Holmstrom, J.Huang, M.Huang, H.F.Ibrahim, M.Iodice, X.Jiang, G.Jin, M.K.Jones, A.Kelleher, W.Kim, A.Kolarkar, W.Korsch, J.J.LeRose, X.Li, Y.Li, R.Lindgren, N.Liyanage, E.Long, H.-J.Lu, D.J.Margaziotis, P.Markowitz, S.Marrone, D.McNulty, Z.-E.Meziani, R.Michaels, B.Moffit, C.Munoz Camacho, S.Nanda, A.Narayan, V.Nelyubin, B.Norum, Y.Oh, M.Osipenko, D.Parno, J.C.Peng, S.K.Phillips, M.Posik, A.J.R.Puckett, Y.Qiang, A.Rakhman, R.D.Ransome, S.Riordan, A.Saha, B.Sawatzky, E.Schulte, A.Shahinyan, M.H.Shabestari, S.Sirca, S.Stepanyan, R.Subedi, V.Sulkosky, L.-G.Tang, A.Tobias, G.M.Urciuoli, I.Vilardi, K.Wang, Y.Wang, B.Wojtsekhowski, X.Yan, H.Yao, Y.Ye, Z.Ye, L.Yuan, X.Zhan, Y.Zhang, Y.-W.Zhang, B.Zhao, X.Zheng, L.Zhu, X.Zhu, X.Zong

Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction ³He ↑ (e, e')X

doi: 10.1103/PhysRevLett.113.022502
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2014MO25      J.Phys.(London) G41, 105109 (2014)

P.Monaghan, R.Shneor, R.Subedi, B.D.Anderson, K.Aniol, J.Annand, J.Arrington, H.B.Benaoum, F.Benmokhtar, P.Bertin, W.Bertozzi, W.Boeglin, J.P.Chen, S.Choi, E.Chudakov, C.Ciofi degli Atti, E.Cisbani, W.Cosyn, B.Craver, C.W.de Jager, R.J.Feuerbach, E.Folts, S.Frullani, F.Garibaldi, O.Gayou, S.Gilad, R.Gilman, O.Glamazdin, J.Gomez, O.Hansen, D.W.Higinbotham, T.Holmstrom, H.Ibrahim, R.Igarashi, E.Jans, X.Jiang, L.Kaufman, A.Kelleher, A.Kolarkar, E.Kuchina, G.Kumbartzki, J.J.LeRose, R.Lindgren, N.Liyanage, D.J.Margaziotis, P.Markowitz, S.Marrone, M.Mazouz, D.Meekins, R.Michaels, B.Moffit, H.Morita, S.Nanda, C.F.Perdrisat, E.Piasetzky, M.Potokar, V.Punjabi, Y.Qiang, J.Reinhold, B.Reitz, G.Ron, G.Rosner, J.Ryckebusch, A.Saha, B.Sawatzky, J.Segal, A.Shahinyan, S.Sirca, K.Slifer, P.Solvignon, V.Sulkosky, N.Thompson, P.E.Ulmer, G.M.Urciuoli, E.Voutier, K.Wang, J.W.Watson, L.B.Weinstein, B.Wojtsekhowski, S.Wood, H.Yao, X.Zheng, L.Zhu

Measurement of the ¹²C(e, e'p)¹¹B two-body breakup reaction at high missing momentum

NUCLEAR REACTIONS ¹²C(E, E'P), E200-400 MeV; measured reaction products, Ep, Ip; deduced σ(θ, E). Comparison with WS+Glauber calculations.

doi: 10.1088/0954-3899/41/10/105109
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2014SI19      Few-Body Systems 55, 893 (2014)

S.Sirca

Study of ³He Nuclei by Polarization Observables in Quasi-Elastic Electron Scattering

doi: 10.1007/s00601-014-0801-y
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2013ES03      Nucl.Phys. A914, 519c (2013)

A.Esser, S.Nagao, F.Schulz, S.Bleser, M.Steinen, P.Achenbach, C.Ayerbe Gayoso, R.Bohm, O.Borodina, D.Bosnar, A.Botvina, V.Bozkurt, L.Debenjak, M.O.Distler, I.Friscic, Y.Fujii, T.Gogami, M.Gomez Rodriguez, O.Hashimoto, S.Hirose, H.Kanda, M.Kaneta, E.Kim, Y.Kohl, J.Kusaka, A.Margaryan, H.Merkel, M.Mihovilovic, U.Muller, S.N.Nakamura, J.Pochodzalla, C.Rappold, J.Reinhold, T.R.Saito, A.Sanchez Lorente, S.Sanchez Majos, B.S.Schlimme, M.Schoth, C.Sfienti, S.Sirca, L.Tang, M.Thiel, K.Tsukada, A.Weber, K.Yoshida

Prospects for hypernuclear physics at Mainz: From KAOS@MAMI to PANDA@FAIR

NUCLEAR REACTIONS ⁹Be(e, ³H), (e, ⁴H), E=1.5 GeV; measured Λ hypernuclei π-meson time coincidence with pion, muon, electron. Preliminary.

doi: 10.1016/j.nuclphysa.2013.02.008
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2013GO14      Eur.Phys.J. A 49, 111 (2013)

B.Golli, S.Sirca

A chiral quark model for meson electroproduction in the region of D-wave resonances

doi: 10.1140/epja/i2013-13111-y
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2013SC18      Phys.Rev.Lett. 111, 132504 (2013)

B.S.Schlimme, P.Achenbach, C.A.Ayerbe Gayoso, J.C.Bernauer, R.Bohm, D.Bosnar, Th.Challand, M.O.Distler, L.Doria, F.Fellenberger, H.Fonvieille, M.Gomez Rodriguez, P.Grabmayr, T.Hehl, W.Heil, D.Kiselev, J.Krimmer, M. Makek, H.Merkel, D.G.Middleton, U.Muller, L.Nungesser, B.A.Ott, J.Pochodzalla, M.Potokar, S.Sanchez Majos, M.M.Sargsian, I.Sick, S.Sirca, M.Weinriefer, M.Wendel, C.J.Yoon

Measurement of the Neutron Electric to Magnetic Form Factor Ratio at Q²=1.58 GeV² Using the Reaction ³He(pol)(e(pol), e'n)pp

NUCLEAR REACTIONS ³He(polarized e, e'n), E=1.508 GeV; measured reaction products, Eβ, Iβ, En, In; deduced neutron electric to magnetic form factor ratio. Comparison with available data.

doi: 10.1103/PhysRevLett.111.132504
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2013SP05      Eur.Phys.J. A 49, 136 (2013)

N.Sparveris, S.Stave, P.Achenbach, C.Ayerbe Gayoso, D.Baumann, J.Bernauer, A.M.Bernstein, R.Bohm, D.Bosnar, T.Botto, A.Christopoulou, D.Dale, M.Ding, M.O.Distler, L.Doria, J.Friedrich, A.Karabarbounis, M.Makek, H.Merkel, U.Muller, I.Nakagawa, R.Neuhausen, L.Nungesser, C.N.Papanicolas, A.Piegsa, J.Pochodzalla, M.Potokar, M.Seimetz, S.Sirca, S.Stiliaris, Th.Walcher, M.Weis

Measurements of the γ^*p → Δ reaction at low Q²

NUCLEAR REACTIONS ¹H(polarized e, e'p)π⁰, E(cm)=1205-1240 MeV; measured Ep, Ip(θ); deduced three unpolarized σ. Compared with published calculations.

doi: 10.1140/epja/i2013-13136-2
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2012AC01      Eur.Phys.J. A 48, 14 (2012)

P.Achenbach, C.Ayerbe Gayoso, J.C.Bernauer, S.Bianchin, R.Bohm, O.Borodina, D.Bosnar, M.Bosz, V.Bozkurt, P.Bydzovsky, L.Debenjak, M.O.Distler, A.Esser, I.Friscic, M.Gomez-Rodriguez, B.Gokuzum, K.Griessinger, P.Jennewein, E.Kim, M.Makek, H.Merkel, S.Minami, U.Muller, D.Nakajima, L.Nungesser, B.Ozel-Tashenov, J.Pochodzalla, Ch.Rappold, T.R.Saito, S.Sanchez Majos, B.S.Schlimme, S.Sirca, M.Weinriefer, C.J.Yoon

Exclusive electroproduction of K⁺Λ and K⁺Σ⁰ final states at Q² = 0.030-0.055 (GeV/c)²

NUCLEAR REACTIONS ¹H(e, e'K⁺)Λ, (e, e'K⁺)Σ⁰, E=1.508 GeV; measured reaction products using high-resolution magnetic spectrometers and Kaos spectrometer at Mainz MAMI microtron; deduced missing mass spectrum, coincidence time spectra, K⁺ yields, σ(θ); calculated K⁺ σ(θ) using different versions of K-maid model.

doi: 10.1140/epja/i2012-12014-9
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2011BO21      Phys.Rev. C 84, 035206 (2011)

P.Bourgeois, Y.Sato, J.Shaw, R.Alarcon, A.M.Bernstein, W.Bertozzi, T.Botto, J.Calarco, F.Casagrande, M.O.Distler, K.Dow, M.Farkondeh, S.Georgakopoulos, S.Gilad, R.Hicks, M.Holtrop, A.Hotta, X.Jiang, A.Karabarbounis, J.Kirkpatrick, S.Kowalski, R.Milner, R.Miskimen, I.Nakagawa, C.N.Papanicolas, A.J.Sarty, S.Sirca, E.Six, N.F.Sparveris, S.Stave, E.Stiliaris, T.Tamae, G.Tsentalovich, C.Tschalaer, W.Turchinetz, Z.-L.Zhou, T.Zwart

Measurements of the generalized electric and magnetic polarizabilities of the proton at low Q² using the virtual Compton scattering reaction

doi: 10.1103/PhysRevC.84.035206
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2011GO13      Eur.Phys.J. A 47, 61 (2011)

B.Golli, S.Sirca

A chiral quark model for meson electroproduction in the S11 partial wave

doi: 10.1140/epja/i2011-11061-0
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2011KI19      Phys.Rev. C 84, 028201 (2011)

J.M.Kirkpatrick, N.F.Sparveris, I.Nakagawa, A.M.Bernstein, R.Alarcon, W.Bertozzi, T.Botto, P.Bourgeois, J.Calarco, F.Casagrande, M.O.Distler, K.Dow, M.Farkhondeh, S.Georgakopoulos, S.Gilad, R.Hicks, A.Holtrop, A.Hotta, X.Jiang, A.Karabarbounis, S.Kowalski, R.Milner, R.Miskimen, C.N.Papanicolas, A.J.Sarty, Y.Sato, S.Sirca, J.Shaw, E.Six, S.Stave, E.Stiliaris, T.Tamae, G.Tsentalovich, C.Tschalaer, W.Turchinetz, Z.-L.Zhou, T.Zwart

Measurement of the partial cross sections σ_TT , σ_LT, and (σ_T + ϵσ_L) of the ¹H(e, e'π⁺)n reaction in the Δ(1232) resonance

NUCLEAR REACTIONS ¹H(e, e'π⁺) at Q²=0.127 GeV/c²; measured electron spectra using OHIPS spectrometer at MIT-Bates facility; deduced differential cross sections for Δ(1232) resonance. Comparison with predictions of MAID, DMT, Sato-Lee, and chiral EFT models.

doi: 10.1103/PhysRevC.84.028201
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2010AC02      Nucl.Phys. A835, 313c (2010)

P.Achenbach, C.Ayerbe Gayoso, J.C.Bernauer, S.Bianchin, R.Bohm, O.Borodina, D.Bosnar, V.Bozkurt, L.Debenjak, A.Denig, M.O.Distler, A.Esser, H.Fonvieille, I.Friscic, B.Gokuzum, K.Griessinger, E.Kim, F.E.Maas, M.Makek, H.Merkel, S.Minami, U.Muller, D.Nakajima, L.Nungesser, B.Ozel-Tashenov, J.Pochodzalla, M.Potokar, C.Rappold, T.R.Saito, S.Sanchez Majos, B.S.Schlimme, S.Sirca, M.Weinriefer

First measurements of Λ and Σ⁰ hyperons in elementary electroproduction at MAMI

NUCLEAR REACTIONS ¹H(e, e'K⁺), E=1507 MeV; measured electron and kaon spectra; deduced missing mass spectrum, Λ-, Σ-hyperons.

doi: 10.1016/j.nuclphysa.2010.01.207
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2010CR03      Phys.Rev. C 82, 045211 (2010)

C.Crawford, T.Akdogan, R.Alarcon, W.Bertozzi, E.Booth, T.Botto, J.R.Calarco, B.Clasie, A.DeGrush, T.W.Donnelly, K.Dow, M.Farkhondeh, R.Fatemi, O.Filoti, W.Franklin, H.Gao, E.Geis, S.Gilad, D.Hasell, P.Karpius, M.Kohl, H.Kolster, T.Lee, E.Lomon, A.Maschinot, J.Matthews, K.McIlhany, N.Meitanis, R.Milner, J.Rapaport, R.Redwine, J.Seely, A.Shinozaki, A.Sindile, S.Sirca, E.Six, T.Smith, B.Tonguc, C.Tschalaer, E.Tsentalovich, W.Turchinetz, Y.Xiao, W.Xu, C.Zhang, Z.Zhou, V.Ziskin, T.Zwart

Role of mesons in the electromagnetic form factors of the nucleon

doi: 10.1103/PhysRevC.82.045211
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2010PU02      Phys.Rev.Lett. 104, 242301 (2010)

A.J.R.Puckett, E.J.Brash, M.K.Jones, W.Luo, M.Meziane, L.Pentchev, C.F.Perdrisat, V.Punjabi, F.R.Wesselmann, A.Ahmidouch, I.Albayrak, K.A.Aniol, J.Arrington, A.Asaturyan, H.Baghdasaryan, F.Benmokhtar, W.Bertozzi, L.Bimbot, P.Bosted, W.Boeglin, C.Butuceanu, P.Carter, S.Chernenko, E.Christy, M.Commisso, J.C.Cornejo, S.Covrig, S.Danagoulian, A.Daniel, A.Davidenko, D.Day, S.Dhamija, D.Dutta, R.Ent, S.Frullani, H.Fenker, E.Frlez, F.Garibaldi, D.Gaskell, S.Gilad, R.Gilman, Y.Goncharenko, K.Hafidi, D.Hamilton, D.W.Higinbotham, W.Hinton, T.Horn, B.Hu, J.Huang, G.M.Huber, E.Jensen, C.Keppel, M.Khandaker, P.King, D.Kirillov, M.Kohl, V.Kravtsov, G.Kumbartzki, Y.Li, V.Mamyan, D.J.Margaziotis, A.Marsh, Y.Matulenko, J.Maxwell, G.Mbianda, D.Meekins, Y.Melnik, J.Miller, A.Mkrtchyan, H.Mkrtchyan, B.Moffit, O.Moreno, J.Mulholland, A.Narayan, S.Nedev, Nuruzzaman, E.Piasetzky, W.Pierce, N.M.Piskunov, Y.Prok, R.D.Ransome, D.S.Razin, P.Reimer, J.Reinhold, O.Rondon, M.Shabestari, A.Shahinyan, K.Shestermanov, S.Sirca, I.Sitnik, L.Smykov, G.Smith, L.Solovyev, P.Solvignon, R.Subedi, E.Tomasi-Gustafsson, M.Veilleux, B.B.Wojtsekhowski, S.Wood, Z.Ye, Y.Zanevsky, X.Zhang, Y.Zhang, X.Zheng, L.Zhu

Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q²=8.5 GeV²

doi: 10.1103/PhysRevLett.104.242301
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2009GO39      Eur.Phys.J. A 42, 185 (2009)

B.Golli, S.Sirca, M.Fiolhais

Pion electro-production in the Roper region in chiral quark models

doi: 10.1140/epja/i2009-10878-2
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2008BO32      Phys.Rev. C 78, 054001 (2008)

W.U.Boeglin, H.Arenhovel, K.I.Blomqvist, R.Bohm, M.Distler, R.Edelhoff, I.Ewald, R.Florizone, J.Friedrich, R.Geiges, M.Kahrau, M.Korn, H.Kramer, K.W.Krygier, V.Kunde, A.Liesenfeld, K.Merle, R.Neuhausen, E.A.J.M.Offermann, Th.Pospischil, A.W.Richter, G.Rosner, P.Sauer, S.Schardt, A.Serdarevic, A.Wagner, Th.Walcher, S.Wolf, J.Jourdan, I.Sick, M.Kuss, M.Potokar, A.Rokavec, B.Vodenik, S.Sirca

f_LT response function of ²H(e, e'p)n at Q²=0.33 GeV/c)²

NUCLEAR REACTIONS ²H(e, e'p), E=855.11 MeV; measured σ, missing momentum, kinematic variables; deduced interference response function. Comparison with Coupled Channels Calculations.

doi: 10.1103/PhysRevC.78.054001
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2008GO31      Eur.Phys.J. A 38, 271 (2008)

B.Golli, S.Sirca

Roper resonances in chiral quark models

doi: 10.1140/epja/i2008-10677-3
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2008JA10      Eur.Phys.J. A 37, 1 (2008)

P.Janssens, L.Doria, P.Achenbach, C.Ayerbe Gayoso, D.Baumann, J.C.Bernauer, I.K.Bensafa, R.Bohm, D.Bosnar, E.Burtin, N.D'Hose, X.Defay, M.Ding, M.O.Distler, H.Fonvieille, J.Friedrich, J.M.Friedrich, G.Laveissiere, M.Makek, J.Marroncle, H.Merkel, U.Muller, L.Nungesser, B.Pasquini, J.Pochodzalla, O.Postavaru, M.Potokar, D.Ryckbosch, S.Sanchez Majos, B.S.Schlimme, M.Seimetz, S.Sirca, G.Tamas, R.Van de Vyver, L.Van Hoorebeke, A.Van Overloop, Th.Walcher, M.Weinriefer

A new measurement of the structure functions P_LL - P_TT/ε and P_LT in virtual Compton scattering at Q² = 0.33 (GeV/c)²

NUCLEAR REACTIONS ¹H(polarized e, e'γ), E=854.6 MeV; measured electron, proton and missing mass spectra; deduced unpolarized σ, structure functions.

doi: 10.1140/epja/i2008-10609-3
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2008SP05      Phys.Rev. C 78, 018201 (2008)

N.F.Sparveris, P.Achenbach, C.Ayerbe Gayoso, D.Baumann, J.Bernauer, A.M.Bernstein, R.Bohm, D.Bosnar, T.Botto, A.Christopoulou, D.Dale, M.Ding, M.O.Distler, L.Doria, J.Friedrich, A.Karabarbounis, M.Makek, H.Merkel, U.Muller, I.Nakagawa, R.Neuhausen, L.Nungesser, C.N.Papanicolas, B.Pasquini, A.Piegsa, J.Pochodzalla, M.Potokar, M.Seimetz, S.Sirca, S.Stave, S.Stiliaris, Th.Walcher, M.Weis

Virtual Compton scattering measurements in the γ^* N → Δ transition

NUCLEAR REACTIONS ¹H(e, e'p), E=855 MeV; measured virtual Compton scattering σ, missing mass spectra; deduced magnetic dipole amplitude.

doi: 10.1103/PhysRevC.78.018201
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2008ST16      Phys.Rev. C 78, 025209 (2008)

S.Stave, N.Sparveris, M.O.Distler, I.Nakagawa, P.Achenbach, C.Ayerbe Gayoso, D.Baumann, J.Bernauer, A.M.Bernstein, R.Bohm, D.Bosnar, T.Botto, A.Christopoulou, D.Dale, M.Ding, L.Doria, J.Friedrich, A.Karabarbounis, M.Makek, H.Merkel, U.Muller, R.Neuhausen, L.Nungesser, C.N.Papanicolas, A.Piegsa, J.Pochodzalla, M.Potokar, M.Seimetz, S.Sirca, S.Stiliaris, Th.Walcher, M.Weis, for the A1 Collaboration

Measurements of the γ^*p → Δ reaction at low Q²: Probing the mesonic contribution

NUCLEAR REACTIONS p(polarized e, e'p)π, E=705, 795, 855 MeV; measured σ, σ(θ).Comparison with model calculations.

doi: 10.1103/PhysRevC.78.025209
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2008WE11      Eur.Phys.J. A 38, 27 (2008)

M.Weis, P.Bartsch, D.Baumann, J.Bermuth, A.M.Bernstein, K.Bohinc, R.Bohm, M.Ding, M.O.Distler, I.Ewald, J.M.Friedrich, J.Friedrich, M.Kahrau, M.Kohl, K.W.Krygier, A.Liesenfeld, H.Merkel, P.Merle, U.Muller, R.Neuhausen, M.M.Pavan, Th.Pospischil, M.Potokar, G.Rosner, H.Schmieden, M.Seimetz, S.Sirca, A.Wagner, Th.Walcher, for The A1 Collaboration

Separated cross-sections in π⁰ electroproduction at threshold at Q² = 0.05 GeV²/c²

NUCLEAR REACTIONS ¹H(e, e'p), E=854.49 MeV; measured neutral pion production σ(θ), missing mass spectra. ¹H(polarized e, e'p), E=854.49 MeV; measured beam helicity asymmetry. Comparison with model calculations.

doi: 10.1140/epja/i2008-10644-6
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2007BE55      Eur.Phys.J. A 32, 69 (2007)

I.K.Bensafa, P.Achenbach, M.A.Antelo, C.Ayerbe, D.Baumann, R.Bohm, D.Bosnar, E.Burtin, X.Defay, N.D'Hose, M.Ding, M.O.Distler, L.Doria, H.Fonvieille, J.M.Friedrich, J.Friedrich, J.Garcia Llongo, P.Janssens, G.J.Manas, M.Kohl, G.Laveissiere, M.Lloyd, M.Makek, J.Marroncle, H.Merkel, P.Merle, U.Muller, L.Nungesser, B.Pasquini, R.Perez Benito, J.Pochodzalla, M.Potokar, G.Rosner, S.Sanchez Majos, M.Seimetz, S.Sirca, T.Spitzenberg, G.Tamas, R.Van de Vyver, L.Van Hoorebeke, Th.Walcher, M.Weis

Beam-helicity asymmetry in photon and pion electroproduction in the Δ (1232)-resonance region at Q² = 0.35(GeV/c)²

doi: 10.1140/epja/i2006-10277-3
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2007CR01      Phys.Rev.Lett. 98, 052301 (2007)

C.B.Crawford, A.Sindile, T.Akdogan, R.Alarcon, W.Bertozzi, E.Booth, T.Botto, J.Calarco, B.Clasie, A.DeGrush, T.W.Donnelly, K.Dow, D.Dutta, M.Farkhondeh, R.Fatemi, O.Filoti, W.Franklin, H.Gao, E.Geis, S.Gilad, W.Haeberli, D.Hasell, W.Hersman, M.Holtrop, P.Karpius, M.Kohl, H.Kolster, T.Lee, A.Maschinot, J.Matthews, K.McIlhany, N.Meitanis, R.G.Milner, R.P.Redwine, J.Seely, A.Shinozaki, S.Sirca, E.Six, T.Smith, B.Tonguc, C.Tschalaer, E.Tsentalovich, W.Turchinetz, J.F.J.van den Brand, J.van der Laan, F.Wang, T.Wise, Y.Xiao, W.Xu, C.Zhang, Z.Zhou, V.Ziskin, T.Zwart

Measurement of the Proton's Electric to Magnetic Form Factor Ratio from ¹H(pol)(e(pol), e'p)

NUCLEAR REACTIONS ¹H(polarized e, e'p), E=high; measured asymmetries. ¹H deduced electric to magnetic form factor ratios. Polarized target.

doi: 10.1103/PhysRevLett.98.052301
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2007ME24      Phys.Rev.Lett. 99, 132301 (2007)

H.Merkel, P.Achenbach, C.Ayerbe Gayoso, J.C.Bernauer, R.Bohm, D.Bosnar, B.Cheymol, M.O.Distler, L.Doria, H.Fonvieille, J.Friedrich, P.Janssens, M.Makek, U.Muller, L.Nungesser, J.Pochodzalla, M.Potokar, S.Sanchez Majos, B.S.Schlimme, S.Sirca, L.Tiator, Th.Walcher, M.Weinriefer, for the A1 Collaboration

Recoil Polarization and Beam-Recoil Double Polarization Measurement of η Electroproduction on the Proton in the Region of the S₁₁(1535) Resonance

doi: 10.1103/PhysRevLett.99.132301
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2007SP06      Phys.Lett. B 651, 102 (2007)

N.F.Sparveris, P.Achenbach, C.Ayerbe Gayoso, D.Baumann, J.Bernauer, A.M.Bernstein, R.Bohm, D.Bosnar, T.Botto, A.Christopoulou, D.Dale, M.Ding, M.O.Distler, L.Doria, J.Friedrich, A.Karabarbounis, M.Makek, H.Merkel, U.Muller, I.Nakagawa, R.Neuhausen, L.Nungesser, C.N.Papanicolas, A.Piegsa, J.Pochodzalla, M.Potokar, M.Seimetz, S.Sirca, S.Stave, S.Stiliaris, Th.Walcher, M.Weis

Determination of quadrupole strengths in the γ^*p → Δ(1232) transition at Q² = 0.20 (GeV/c)²

doi: 10.1016/j.physletb.2007.04.056
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2006BO29      Phys.Rev.Lett. 97, 212001 (2006)

P.Bourgeois, Y.Sato, J.Shaw, R.Alarcon, A.M.Bernstein, W.Bertozzi, T.Botto, J.Calarco, F.Casagrande, M.O.Distler, K.Dow, M.Farkhondeh, S.Georgakopoulos, S.Gilad, R.Hicks, M.Holtrop, A.Hotta, X.Jiang, A.Karabarbounis, J.Kirkpatrick, S.Kowalski, R.Milner, R.Miskimen, I.Nakagawa, C.N.Papanicolas, A.J.Sarty, S.Sirca, E.Six, N.F.Sparveris, S.Stave, E.Stiliaris, T.Tamae, G.Tsentalovich, C.Tschalaer, W.Turchinetz, Z.-L.Zhou, T.Zwart

Measurements of the Generalized Electric and Magnetic Polarizabilities of the Proton at Low Q² Using the Virtual-Compton-Scattering Reaction

NUCLEAR REACTIONS ¹H(e, e'), E=570-670 MeV; measured σ(E, θ), response functions. ¹H deduced polarizability radii. Virtual Compton scattering.

doi: 10.1103/PhysRevLett.97.212001
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2005AL42      Eur.Phys.J. A 26, 99 (2005)

P.Alberto, L.Amoreira, M.Fiolhais, B.Golli, S.Sirca

Direct calculation of the K-matrix for pion electro-production in the delta channel

doi: 10.1140/epja/i2005-10160-9
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2005KR14      Phys.Rev.Lett. 95, 142002 (2005)

K.Kramer, D.S.Armstrong, T.D.Averett, W.Bertozzi, S.Binet, C.Butuceanu, A.Camsonne, G.D.Cates, J.-P.Chen, S.Choi, E.Chudakov, F.Cusanno, A.Deur, P.Djawotho, D.Dutta, J.M.Finn, H.Gao, F.Garibaldi, O.Gayou, R.Gilman, A.Glamazdin, V.Gorbenko, K.A.Griffioen, J.-O.Hansen, D.W.Higinbotham, W.Hinton, T.Horn, C.W.de Jager, X.Jiang, W.Korsch, J.LeRose, D.Lhuillier, N.Liyanage, D.J.Margaziotis, K.McCormick, Z.-E.Meziani, R.Michaels, B.Milbrath, B.Moffit, S.Nanda, C.F.Perdrisat, R.Pomatsalyuk, V.Punjabi, B.Reitz, J.Roche, R.Roche, M.Roedelbronn, N.Savvinov, J.Secrest, J.Singh, S.Sirca, K.Slifer, P.Solvignon, D.J.Steiner, R.Suleiman, V.Sulkosky, A.Tobias, A.Vacheret, Y.Xiao, X.Zheng, J.Zhou, L.Zhu, X.Zhu, P.A.Zolnierczuk

Q² Dependence of the Neutron Spin Structure Function gⁿ₂ at Low Q²

NUCLEAR REACTIONS ³He(polarized e, e'), E=3.465-5.727 GeV; measured parallel and perpendicular cross section differences. ¹n, ³He deduced momentum transfer dependence of spin structure function.

doi: 10.1103/PhysRevLett.95.142002
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2005SP01      Phys.Rev.Lett. 94, 022003 (2005)

N.F.Sparveris, R.Alarcon, A.M.Bernstein, W.Bertozzi, T.Botto, P.Bourgeois, J.Calarco, F.Casagrande, M.O.Distler, K.Dow, M.Farkhondeh, S.Georgakopoulos, S.Gilad, R.Hicks, M.Holtrop, A.Hotta, X.Jiang, A.Karabarbounis, J.Kirkpatrick, S.Kowalski, R.Milner, R.Miskimen, I.Nakagawa, C.N.Papanicolas, A.J.Sarty, Y.Sato, S.Sirca, J.Shaw, E.Six, S.Stave, E.Stiliaris, T.Tamae, G.Tsentalovich, C.Tschalaer, W.Turchinetz, Z.-L.Zhou, T.Zwart

Investigation of the Conjectured Nucleon Deformation at Low Momentum Transfer

NUCLEAR REACTIONS ¹H(e, e'π⁰), E=950 MeV; measured Ep, σ(θ). ¹H deduced quadrupole to dipole amplitude ratios.

doi: 10.1103/PhysRevLett.94.022003
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2004AN27      Eur.Phys.J. A 22, 449 (2004)

K.A.Aniol, M.B.Epstein, E.Gama, D.J.Margaziotis, W.Bertozzi, J.P.Chen, D.Dale, R.E.J.Florizone, S.Gilad, A.J.Sarty, J.A.Templon, S.P.Van Verst, J.Zhao, Z.-L.Zhou, P.Bartsch, W.U.Boeglin, R.Boehm, M.O.Distler, I.Ewald, J.M.Friedrich, J.M.Friedrich, R.Geiges, P.Jennewein, M.Kahrau, K.W.Krygier, A.Liesenfeld, H.Merkel, K.Merle, U.Muller, R.Neuhausen, E.A.J.M.Offermann, Th.Pospischil, G.Rosner, H.Schmieden, A.Wagner, Th.Walcher, M.Kuss, A.Richter, G.Schrieder, K.Bohinc, M.Potokar, S.Sirca, J.M.Udias, J.R.Vignote, R.Schiavilla

Measurement of R_LT and A_TL in the ⁴He(e, e'p)³H reaction at p_miss of 130-300 MeV/c

NUCLEAR REACTIONS ⁴He(e, e'p), E=675, 855 MeV; measured σ(E, θ), transverse-longitudinal asymmetry, response function. Comparison with model predictions.

doi: 10.1140/epja/i2004-10040-x
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2004SI33      Fizika(Zagreb) B 13, 135 (2004)

S.Sirca, for the A1 Collaboration at MAMI

Nucleon structure from pion electro-production experiments at MAMI

2003BE39      Phys.Lett. B 564, 199 (2003)

J.Bermuth, P.Merle, C.Carasco, D.Baumann, R.Bohm, D.Bosnar, M.Ding, M.O.Distler, J.Friedrich, J.M.Friedrich, J.Golak, W.Glockle, M.Hauger, W.Heil, P.Jennewein, J.Jourdan, H.Kamada, A.Klein, M.Kohl, B.Krusche, K.W.Krygier, H.Merkel, U.Muller, R.Neuhausen, A.Nogga, Ch.Normand, E.Otten, Th.Pospischil, M.Potokar, D.Rohe, H.Schmieden, J.Schmiedeskamp, M.Seimetz, I.Sick, S.Sirca, R.Skibinski, G.Testa, Th.Walcher, G.Warren, M.Weis, H.Witala, H.Wohrle, M.Zeier

The neutron charge from factor and target analyzing powers from ³He(pol)(e(pol), e'n) scattering

NUCLEAR REACTIONS ³He(polarized e, e'n), E=854.5 MeV; measured particle spectra, asymmetries, analyzing power; deduced final state interaction effects. ¹n deduced charge form factor. Polarized target.

doi: 10.1016/S0370-2693(03)00725-1
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2003CA09      Phys.Lett. B 559, 41 (2003)

C.Carasco, J.Bermuth, P.Merle, P.Bartsch, D.Baumann, R.Bohm, D.Bosnar, M.Ding, M.O.Distler, J.Friedrich, J.M.Friedrich, J.Golak, W.Glockle, M.Hauger, W.Heil, P.Jennewein, J.Jourdan, H.Kamada, A.Klein, M.Kohl, K.W.Krygier, H.Merkel, U.Muller, R.Neuhausen, A.Nogga, Ch.Normand, E.Otten, Th.Pospischil, M.Potokar, D.Rohe, H.Schmieden, J.Schmiedeskamp, M.Seimetz, I.Sick, S.Sirca, R.Skibinski, G.Testa, Th.Walcher, G.Warren, M.Weis, H.Witala, H.Wohrle, M.Zeier

Final state interaction effects in ³He(pol)(e(pol), e'p)

NUCLEAR REACTIONS ³He(polarized e, e'p), E=854.5 MeV; measured Ep, σ(θ), asymmetries; deduced final-state interaction effects. Polarized target, comparison with model predictions.

doi: 10.1016/S0370-2693(03)00306-X
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2002KO16      Phys.Lett. 530B, 67 (2002)

M.Kohl, P.Bartsch, D.Baumann, J.Bermuth, R.Bohm, K.Bohinc, S.Derber, M.Ding, M.O.Distler, I.Ewald, J.Friedrich, J.M.Friedrich, P.Jennewein, M.Kahrau, S.S.Kamalov, A.Kozlov, K.W.Krygier, M.Kuss, A.Liesenfeld, H.Merkel, P.Merle, U.Muller, R.Neuhausen, Th.Pospischil, M.Potokar, C.Rangacharyulu, A.Richter, D.Rohe, G.Rosner, H.Schmieden, G.Schrieder, M.Seimetz, S.Sirca, T.Suda, L.Tiator, M.Urban, A.Wagner, Th.Walcher, J.Wambach, M.Weis, A.Wirzba

Self Energies of the Pion and the Δ Isobar from the ³He(e, e'π⁺)³H Reaction

NUCLEAR REACTIONS ³He(e, e'π⁺), E=855 MeV; measured σ(θ, E), longitudinal and transverse σ(θ); deduced reduction in π⁺ mass. Chiral Perturbation Theory.

doi: 10.1016/S0370-2693(02)01345-X
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2002KU01      Phys.Lett. 524B, 26 (2002)

G.Kubon, H.Anklin, P.Bartsch, D.Baumann, W.U.Boeglin, K.Bohinc, R.Bohm, M.O.Distler, I.Ewald, J.Friedrich, J.M.Friedrich, M.Hauger, A.Honegger, P.Jennewein, J.Jourdan, M.Kahrau, K.W.Krygier, A.Liesenfeld, H.Merkel, U.Muller, R.Neuhausen, Ch.Normand, Th.Petitjean, Th.Pospischil, M.Potokar, D.Rohe, G.Rosner, H.Schmieden, I.Sick, S.Sirca, Ph.Trueb, A.Wagner, Th.Walcher, G.Warren, M.Weis, H.Wohrle, M.Zeier, J.Zhao, B.Zihlmann

Precise Neutron Magnetic Form Factors

NUCLEAR REACTIONS ²H(e, e'p), (e, e'n), E=555, 600, 855 MeV; measured relative σ(Q²). ¹n deduced magnetic form factors.

doi: 10.1016/S0370-2693(01)01386-7
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2001EW01      Phys.Lett. 499B, 238 (2001)

I.Ewald, P.Bartsch, D.Baumann, J.Bermuth, A.M.Bernstein, K.Bohinc, R.Bohm, N.Clawiter, S.Derber, M.Ding, M.O.Distler, J.Friedrich, J.M.Friedrich, M.Kahrau, M.Kohl, A.Kozlov, K.W.Krygier, A.Liesenfeld, H.Merkel, P.Merle, U.Muller, R.Neuhausen, M.Pavan, Th.Pospischil, M.Potokar, D.Rohe, G.Rosner, H.Schmieden, S.Sirca, A.Wagner, Th.Walcher, M.Weis

Coherent π⁰ Threshold Production from the Deuteron at Q² = 0.1 GeV²/c²

NUCLEAR REACTIONS ²H(e, e'π⁰), E=345, 435, 720 MeV; measured missing mass distributions, σ(θ), σ; deduced partial wave contributions. Comparison with Chiral Perturbation theory.

doi: 10.1016/S0370-2693(00)01396-4
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2001KO24      Nucl.Phys. A684, 460c (2001)

A.Kozlov, K.A.Aniol, P.Bartsch, D.Baumann, W.Bertozzi, R.Bohm, K.Bohinc, J.P.Chen, D.Dale, L.Dennis, S.Derber, M.Ding, M.O.Distler, P.Dragovitsch, I.Ewald, K.G.Fissum, R.E.J.Florizone, J.Friedrich, J.M.Friedrich, R.Geiges, S.Gilad, P.Jennewein, M.Kahrau, M.Kohl, K.W.Krygier, A.Liesenfeld, D.J.Margaziotis, H.Merkel, P.Merle, U.Muller, R.Neuhausen, T.Pospischil, G.Riccardi, R.Roche, G.Rosner, D.Rowntree, A.J.Sarty, H.Schmieden, S.Sirca, J.A.Templon, M.N.Thompson, A.Wagner, Th.Walcher, M.Weis, J.Zhao, Z.Zhou

The Longitudinal and Transverse Response of the ⁴He(e, e'p) Reaction in the Dip Region

NUCLEAR REACTIONS ⁴He(e, e'p), E=570, 675, 855 MeV; measured σ(E, θ), momentum distributions; deduced reaction mechanism features.

doi: 10.1016/S0375-9474(01)00504-8
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2001PO08      Phys.Rev.Lett. 86, 2959 (2001)

Th.Pospischil, P.Bartsch, D.Baumann, J.Bermuth, R.Bohm, K.Bohinc, S.Derber, M.Ding, M.Distler, D.Drechsel, D.Elsner, I.Ewald, J.Friedrich, J.M.Friedrich, R.Geiges, S.Hedicke, P.Jennewein, M.Kahrau, S.S.Kamalov, F.Klein, K.W.Krygier, J.Lac, A.Liesenfeld, J.McIntyre, H.Merkel, P.Merle, U.Muller, R.Neuhausen, M.Potokar, R.D.Ransome, D.Rohe, G.Rosner, H.Schmieden, M.Seimetz, S.Sirca, I.Sick, A.Sule, L.Tiator, A.Wagner, Th.Walcher, G.A.Warren, M.Weis

Measurement of the Recoil Polarization in the p(e(pol), e'p(pol)π⁰ Reaction at the Δ(1232) Resonance

NUCLEAR REACTIONS ¹H(polarized e, e'π⁰), E=854.4 MeV; measured recoil proton polarization components; deduced Coulomb quadrupole to magnetic dipole ratio. Mainz unitary isobar model.

doi: 10.1103/PhysRevLett.86.2959
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2001PO27      Eur.Phys.J. A 12, 125 (2001)

Th.Pospischil, P.Bartsch, D.Baumann, R.Bohm, K.Bohinc, M.Ding, S.Derber, M.O.Distler, D.Elsner, I.Ewald, J.Friedrich, J.M.Friedrich, S.Grozinger, S.Hedicke, P.Jennewein, J.Jourdan, M.Kahrau, F.Klein, K.W.Krygier, J.Lac, A.Liesenfeld, S.Malov, J.McIntyre, H.Merkel, P.Merle, U.Muller, R.Neuhausen, M.Potokar, R.D.Ransome, D.Rohe, G.Rosner, J.Sanner, H.Schmieden, M.Seimetz, S.Sirca, I.Sick, O.Strahle, A.Sule, A.Wagner, Th.Walcher, M.Weis

Measurement of G_Ep/G_Mp via Polarization Transfer at Q² = 0.4 GeV/c²

NUCLEAR REACTIONS ¹H(polarized e, e), E=854.4 MeV; measured polarization transfer; deduced form factor ratio.

doi: 10.1007/s100500170046
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1999BA31      Eur.Phys.J. A 4, 209 (1999)

P.Bartsch, D.Baumann, J.Bermuth, K.Bohinc, R.Bohm, D.Bosnar, N.Clawiter, S.Derber, M.Ding, M.O.Distler, A.Ebbes, I.Ewald, J.M.Friedrich, J.Friedrich, P.Jennewein, M.Kahrau, M.Kohl, A.Kozlov, K.W.Krygier, M.Kuss, A.Liesenfeld, H.Merkel, K.Merle, U.Muller, R.Neuhausen, T.Pospischil, M.Potokar, D.Rohe, G.Rosner, H.Schmieden, S.Sirca, A.Wagner, T.Walcher, M.Weis, S.Wolf

Evidence for Narrow Δ⁰(1232) States in the ¹²C(e, e'pπ^-)¹¹C Reaction

NUCLEAR REACTIONS ¹²C(e, e'pπ^-), E=600, 855 MeV; measured missing momentum, excitation energy spectra. ¹²C deduced bound Δ⁰ resonance states, widths. Triple coincidence measurement. Weak coupling model analysis.

doi: 10.1007/s100500050220
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1999FL02      Phys.Rev.Lett. 83, 2308 (1999)

R.E.J.Florizone, W.Bertozzi, J.P.Chen, D.Dale, S.Gilad, A.J.Sarty, J.A.Templon, S.P.Van Verst, J.Zhao, Z.-L.Zhou, P.Bartsch, W.U.Boeglin, R.Bohm, M.O.Distler, I.Ewald, J.Friedrich, J.M.Friedrich, R.Geiges, P.Jennewein, M.Kahrau, K.W.Krygier, A.Liesenfeld, H.Merkel, K.Merle, U.Muller, R.Neuhausen, E.A.J.M.Offermann, Th.Pospischil, G.Rosner, H.Schmieden, A.Wagner, Th.Walcher, K.A.Aniol, M.B.Epstein, D.J.Margaziotis, M.Kuss, A.Richter, G.Schrieder, K.Bohinc, M.Potokar, S.Sirca

High-Precision Studies of the ³He(e, e'p) Reaction at the Quasielastic Peak

NUCLEAR REACTIONS ³He(e, e'p), E=540, 675, 855 MeV; measured σ(E, θ(p), θ(e)); deduced two-body-breakup, continuum momentum distributions. Quasielastic kinematics.

doi: 10.1103/PhysRevLett.83.2308
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1999LI41      Phys.Lett. 468B, 20 (1999)

A.Liesenfeld, A.W.Richter, S.Sirca, K.I.Blomqvist, W.U.Boeglin, K.Bohinc, R.Bohm, M.Distler, D.Drechsel, R.Edelhoff, I.Ewald, J.Friedrich, J.M.Friedrich, R.Geiges, M.Kahrau, M.Korn, K.W.Krygier, V.Kunde, H.Merkel, K.Merle, U.Muller, R.Neuhausen, T.Pospischil, M.Potokar, A.Rokavec, G.Rosner, P.Sauer, S.Schardt, H.Schmieden, L.Tiator, B.Vodenik, A.Wagner, Th.Walcher, S.Wolf

A Measurement of the Axial Form Factor of the Nucleon by the p(e, e'π⁺)n Reaction at W = 1125 MeV

NUCLEAR REACTIONS ¹H(e, e'π⁺), E=405-855 MeV; measured longitudinal, transverse σ(θ); deduced axial mass parameter. Effective Lagrangian model.

doi: 10.1016/S0370-2693(99)01204-6
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1999RO15      Fizika(Zagreb) B8, 383 (1999)

M.Rosina, M.Fiolhais, B.Golli, S.Sirca

The Role of the Pion Cloud in the Nucleon Form Factors

NUCLEAR STRUCTURE ¹H; calculated normalized axial form factor; deduced role of pion cloud. Linear sigma model, chromodielectric model.

1999RO19      Phys.Rev.Lett. 83, 4257 (1999)

D.Rohe, P.Bartsch, D.Baumann, J.Becker, J.Bermuth, K.Bohinc, R.Bohm, S.Buttazzoni, T.Caprano, N.Clawiter, A.Deninger, S.Derber, M.Ding, M.Distler, A.Ebbes, M.Ebert, I.Ewald, J.Friedrich, J.M.Friedrich, R.Geiges, T.Grossmann, M.Hauger, W.Heil, A.Honegger, P.Jennewein, J.Jourdan, M.Kahrau, A.Klein, M.Kohl, K.W.Krygier, G.Kubon, A.Liesenfeld, H.Merkel, K.Merle, P.Merle, M.Muhlbauer, U.Muller, R.Neuhausen, E.W.Otten, Th.Petitjean, Th.Pospischil, M.Potokar, G.Rosner, H.Schmieden, I.Sick, S.Sirca, R.Surkau, A.Wagner, Th.Walcher, G.Warren, M.Weis, H.Wohrle, M.Zeier

Measurement of the Neutron Electric Form Factor G_en at 0.67 (GeV/c)2 via ³He(pol)(e(pol), e'n)

NUCLEAR REACTIONS ³He(polarized e, e'n), E=854 MeV; measured electron spectra, neutron spectra, asymmetries. ¹n deduced electric form factor. Polarized target.

doi: 10.1103/PhysRevLett.83.4257
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1998AN13      Phys.Lett. 428B, 248 (1998)

H.Anklin, L.J.deBever, K.I.Blomqvist, W.U.Boeglin, R.Bohm, M.Distler, R.Edelhoff, J.Friedrich, D.Fritschi, R.Geiges, J.Gotz, A.Honegger, P.Jennewein, J.Jourdan, M.Kahrau, M.Korn, H.Kramer, K.W.Krygier, G.Kubon, V.Kunde, A.Liesenfeld, G.Masson, K.Merle, R.Neuhausen, E.A.J.M.Offermann, Th.Petitjean, Th.Pospischil, M.Potokar, L.M.Qin, A.W.Richter, A.Rokavec, G.Rosner, P.Sauer, S.Schardt, I.Sick, S.Sirca, Ph.Trueb, M.Tuccillo, B.Vodenik, A.Wagner, Th.Walcher, G.Warren, S.Wolf, J.Zhao, M.Zeier, B.Zihlmann

Precise Measurements of the Neutron Magnetic Form Factor

NUCLEAR REACTIONS ²H(e, e'p), (e, e'n), E not given; measured σ ratios vs momentum transfer; deduced neutron magnetic form factor G(mn).

doi: 10.1016/S0370-2693(98)00442-0
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1998BL07      Phys.Lett. 424B, 33 (1998)

K.I.Blomqvist, W.U.Boeglin, R.Bohm, M.Distler, R.Edelhoff, I.Ewald, R.Florizone, J.Friedrich, R.Geiges, J.Jourdan, M.Kahrau, M.Korn, H.Kramer, K.W.Krygier, V.Kunde, M.Kuss, A.Liesenfeld, K.Merle, R.Neuhausen, E.A.J.M.Offermann, Th.Pospischil, M.Potokar, A.W.Richter, A.Rokavec, G.Rosner, P.Sauer, S.Schardt, A.Serdarevic, B.Vodenik, I.Sick, S.Sirca, A.Wagner, Th.Walcher, S.Wolf

Large Recoil Momenta in the D(e, e'p)n Reaction

NUCLEAR REACTIONS ²H(e, e'p), E=855.11 MeV; measured σ(θ(e), θ(p)) vs missing momentum; deduced possible virtual nucleon excitation role. Model comparisons.

doi: 10.1016/S0370-2693(98)00151-8
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1998DI03      Phys.Rev.Lett. 80, 2294 (1998)

M.O.Distler, A.M.Bernstein, K.I.Blomqvist, W.U.Boeglin, R.Bohm, R.Edelhoff, J.Friedrich, R.Geiges, M.Kahrau, M.Korn, H.Kramer, K.W.Krygier, V.Kunde, M.Kuss, A.Liesenfeld, H.Merkel, K.Merle, R.Neuhausen, Th.Pospischil, M.Potokar, A.Rokavec, A.W.Richter, G.Rosner, P.Sauer, St.Schardt, H.Schmieden, S.Sirca, B.Vodenik, A.Wagner, Th.Walcher, St.Wolf

Measurement of Separated Structure Functions in the p(e, e'p)π⁰ Reaction at Threshold and Chiral Perturbation Theory

NUCLEAR REACTIONS ¹H(e, e'π⁰), E=435, 555, 855 MeV; measured pion σ(E, θ); deduced structure functions. Comparison with chiral perturbation theory calculations.

doi: 10.1103/PhysRevLett.80.2294
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1996BL02      Z.Phys. A353, 415 (1996)

K.I.Blomqvist, W.U.Boeglin, R.Bohm, M.Distler, D.Drechsel, R.Edelhoff, J.Friedrich, R.Geiges, O.Hanstein, M.Kahrau, M.Korn, H.Kramer, K.W.Krygier, V.Kunde, M.Kuss, A.Liesenfeld, K.Merle, R.Neuhausen, E.A.J.M.Offermann, Th.Pospischil, M.Potokar, A.Rokavec, A.W.Richter, G.Rosner, P.Sauer, S.Schardt, H.Schmieden, S.Sirca, L.Tiator, B.Vodenik, A.Wagner, Th.Walcher, S.Wolf

Precise Pion Electroproduction in the p(e, e'π⁺)n Reaction at W = 1125 MeV

NUCLEAR REACTIONS ¹H(e, e'π⁺), E(cm)=1125 MeV; measured missing energy spectra, coincidence, longitudinal σ, asymmetry; deduced longitudinal, transverse structure functions, interference term.

doi: 10.1007/BF01285153
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1996FI04      Phys.Lett. 373B, 229 (1996)

M.Fiolhais, B.Golli, S.Sirca

The Role of the Pion Cloud in Electroproduction of the Δ(1232)

doi: 10.1016/0370-2693(96)00130-X
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