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NSR database version of April 11, 2024.

Search: Author = I.Ewald

Found 20 matches.

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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

fLT 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
Citations: PlumX Metrics


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
Citations: PlumX Metrics


2006EL02      Eur.Phys.J. A 27, 91 (2006)

D.Elsner, A.Sule, P.Barneo, P.Bartsch, D.Baumann, J.Bermuth, R.Bohm, D.Bosnar, M.Ding, M.Distler, D.Drechsel, I.Ewald, J.Friedrich, J.M.Friedrich, S.Grozinger, P.Jennewein, S.Kamalov, F.H.Klein, M.Kohl, K.W.Krygier, H.Merkel, P.Merle, U.Muller, R.Neuhausen, Th.Pospischil, M.Potokar, G.Rosner, H.Schmieden, M.Seimetz, O.Strahle, L.Tiator, Th.Walcher, M.Weis

Measurement of the LT-asymmetry in π0 electroproduction at the energy of the Δ(1232)-resonance

NUCLEAR REACTIONS 1H(polarized e, e'π0), E=855 MeV; measured longitudinal-transverse asymmetry at forward and backward angles; deduced multipole ratios. Comparison with model predictions and other data.

doi: 10.1140/epja/i2005-10212-2
Citations: PlumX Metrics


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 RLT and ATL in the 4He(e, e'p)3H reaction at pmiss 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
Citations: PlumX Metrics


2002BA34      Phys.Rev.Lett. 88, 142001 (2002)

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

Measurement of the Beam-Helicity Asymmetry in the p(e(pol), e'p)π0 Reaction at the Energy of the Δ(1232) Resonance

NUCLEAR REACTIONS 1H(polarized e, e'π0), (polarized e, e'pX), E=854.5 MeV; measured missing mass, beam-helicity asymmetry. Comparison with model predictions.

doi: 10.1103/PhysRevLett.88.142001
Citations: PlumX Metrics


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
Citations: PlumX Metrics


2001DI06      Phys.Lett. 500B, 47 (2001)

S.Dieterich, P.Bartsch, D.Baumann, J.Bermuth, K.Bohinc, R.Bohm, D.Bosnar, S.Derber, M.Ding, M.Distler, I.Ewald, J.Friedrich, J.M.Friedrich, R.Gilman, C.Glashausser, M.Hauger, P.Jennewein, J.Jourdan, J.J.Kelly, M.Kohl, A.Kozlov, K.W.Krygier, G.Kumbartzki, J.Lac, A.Liesenfeld, H.Merkel, U.Muller, R.Neuhausen, Th.Pospischil, R.D.Ransome, D.Rohe, G.Rosner, H.Schmieden, M.Seimetz, I.Sick, S.Strauch, J.M.Udias, J.R.Vignote, A.Wagner, Th.Walcher, G.Warren, M.Weis

Polarization Transfer in the 4He((pol)e, e'p(pol))3H Reaction

NUCLEAR REACTIONS 4He(polarized e, e'p), E=854.5 MeV; measured polarization transfer vs missing momentum. Comparison with model predictions.

doi: 10.1016/S0370-2693(01)00052-1
Citations: PlumX Metrics


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
Citations: PlumX Metrics


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
Citations: PlumX Metrics


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
Citations: PlumX Metrics


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 GEp/GMp 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
Citations: PlumX Metrics


2000FR07      Nucl.Phys. A663-664, 389c (2000)

J.M.Friedrich, P.Bartsch, D.Baumann, J.Berthot, P.Y.Bertin, V.Breton, W.U.Boeglin, R.Bohm, N.d'Hose, T.Caprano, S.Derber, N.Degrande, M.Ding, M.O.Distler, J.E.Ducret, R.Edelhoff, I.Ewald, H.Fonvieille, J.Friedrich, R.Geiges, Th.Gousset, P.A.M.Guichon, H.Holvoet, Ch.Hyde-Wright, P.Jennewein, M.Kahrau, S.Kerhoas, M.Korn, H.Kramer, K.W.Krygier, V.Kunde, B.Lannoy, D.Lhuillier, A.Liesenfeld, C.Marchand, D.Marchand, J.Martino, H.Merkel, K.Merle, P.Merle, G.De Meyer, J.Mougey, R.Neuhausen, E.Offermann, Th.Pospischil, G.Quemener, O.Ravel, Y.Roblin, J.Roche, D.Rohe, G.Rosner, D.Ryckbosch, P.Sauer, H.Schmieden, S.Schardt, G.Tamas, M.Tytgat, M.Vanderhaeghen, L.Van Hoorebeke, R.Van de Vyver, J.Van de Wiele, P.Vernin, A.Wagner, Th.Walcher

The First Dedicated Virtual Compton Scattering Experiment at MAMI

NUCLEAR REACTIONS 1H(e, e'γ), E not given; measured ep-coin, σ(E, θ(e), θ(p)); deduced structure function.

doi: 10.1016/S0375-9474(99)00624-7
Citations: PlumX Metrics


2000RO21      Phys.Rev.Lett. 85, 708 (2000)

J.Roche, J.M.Friedrich, D.Lhuillier, P.Bartsch, D.Baumann, J.Berthot, P.Y.Bertin, V.Breton, W.U.Boeglin, R.Bohm, N.D'Hose, S.Derber, N.Degrande, M.Ding, M.O.Distler, J.E.Ducret, I.Ewald, H.Fonvieille, J.Friedrich, P.A.M.Guichon, H.Holvoet, Ch.E.Hyde-Wright, P.Jennewein, M.Kahrau, S.Kerhoas, K.W.Krygier, B.Lannoy, A.Liesenfeld, C.Marchand, D.Marchand, J.Marroncle, J.Martino, H.Merkel, P.Merle, G.De Meyer, J.Mougey, U.Muller, R.Neuhausen, Th.Pospischil, G.Quemener, O.Ravel, Y.Roblin, D.Rohe, G.Rosner, D.Ryckbosch, H.Schmieden, G.Tamas, M.Tytgat, M.Vanderhaeghen, L.Van Hoorebeke, R.Van de Vyver, J.Van de Wiele, P.Vernin, A.Wagner, Th.Walcher, M.Weiss

First Determination of Generalized Polarizabilities of the Proton by a Virtual Compton Scattering Experiment

NUCLEAR REACTIONS 1H(polarized e, e'γ), E=855 MeV; measured σ(E, θ(e), θ(p)). 1H deduced dynamic structure functions, generalized polarizibilities. High-resolution spectrometers, virtual Compton scattering.

doi: 10.1103/PhysRevLett.85.708
Citations: PlumX Metrics


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
Citations: PlumX Metrics


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
Citations: PlumX Metrics


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
Citations: PlumX Metrics


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 Gen 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
Citations: PlumX Metrics


1999RO30      Nucl.Phys. (Supplement) A654, 547c (1999)

J.Roche, P.Bartsch, J.Berthot, P.Y.Bertin, V.Breton, W.U.Boeglin, R.Bohm, N.d'Hose, T.Caprano, S.Derber, N.Degrande, M.Distler, J.E.Ducret, R.Edelhoff, I.Ewald, H.Fonvieille, J.Friedrich, J.M.Friedrich, R.Geiges, Th.Gousset, P.A.M.Guichon, H.Holvoet, Ch.Hyde-Wright, P.Jennewein, M.Kahrau, S.Kerhoas, M.Korn, H.Kramer, K.W.Krygier, V.Kunde, B.Lannoy, D.Lhuillier, A.Liesenfeld, C.Marchand, D.Marchand, J.Martino, H.Merkel, K.Merle, P.Merle, G.De Meyer, J.Mougey, R.Neuhausen, E.Offermann, Th.Pospischil, G.Quemener, O.Ravel, Y.Roblin, G.Rosner, D.Ryckbosch, P.Sauer, H.Schmieden, S.Schardt, G.Tamas, M.Tytgat, M.Vanderhaeghen, L.Van Hoorebeke, R.Van de Vyver, J.Van de Wiele, P.Vernin, A.Wagner, Th.Walcher, S.Wolf

Virtual Compton Scattering Under π0 Threshold at Q2 = 0.33 GeV2. Preliminary Results.

NUCLEAR REACTIONS 1H(e, e'γ), E=750-855 MeV; measured ep-coin, photon polarization, σ(θ). Virtual Compton scattering.

doi: 10.1016/S0375-9474(00)88498-5
Citations: PlumX Metrics


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
Citations: PlumX Metrics


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