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Search: Author = A.Feltham

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2001AM01      Nucl.Phys. A684, 386c (2001)

A.Ambardar, F.Duncan, A.Feltham, G.Hofman, R.R.Johnson, G.Jones, J.B.Lange, M.Pavan, K.J.Raywood, D.Vetterli, J.T.Brack, D.Ottewell, G.R.Smith, M.E.Sevior

Measurement of π p → ππ n Cross-Sections Near Threshold

NUCLEAR REACTIONS 1H(π-, π+π-), (π+, 2π+), E=176-200 MeV; measured σ; deduced reaction matrix elements, scattering lengths.

doi: 10.1016/S0375-9474(01)00403-1
Citations: PlumX Metrics


2001PA45      Phys.Rev. C64, 064611 (2001)

M.M.Pavan, J.T.Brack, F.Duncan, A.Feltham, G.Jones, J.Lange, K.J.Raywood, M.E.Sevior, R.Adams, D.F.Ottewell, G.R.Smith, B.Wells, R.L.Helmer, E.L.Mathie, R.Tacik, R.A.Ristinen, I.I.Strakovsky, H.-M.Staudenmaier

Precision Pion-Proton Elastic Differential Cross Sections at Energies Spanning the Δ Resonance

NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), E=141.15-267.3 MeV; measured σ(θ), (pion)(proton)-coin. Comparison with model predictions.

doi: 10.1103/PhysRevC.64.064611
Citations: PlumX Metrics


2000LA03      Phys.Rev. C61, 025201 (2000)

J.B.Lange, A.Ambardar, F.Duncan, A.Feltham, G.Hofman, R.R.Johnson, G.Jones, M.Pavan, K.J.Raywood, D.Vetterli, J.T.Brack, D.Ottewell, G.R.Smith, M.E.Sevior

Determination of the π±p → π±π+n Cross Section Near Threshold

NUCLEAR REACTIONS 1H(π-, π+π-), E=176-200 MeV; 1H(π+, 2π+), E=184, 200 MeV; measured total σ; deduced reaction matrix elements, scattering lengths. Heavy baryon chiral perturbation theory. Comparisons with previous results.

doi: 10.1103/PhysRevC.61.025201
Citations: PlumX Metrics


1999AN43      Phys.Lett. 463B, 339 (1999)

P.L.Anthony, R.G.Arnold, T.Averett, H.R.Band, M.C.Berisso, H.Borel, P.E.Bosted, S.L.Bultmann, M.Buenerd, T.Chupp, S.Churchwell, G.R.Court, D.Crabb, D.Day, P.Decowski, P.DePietro, R.Erbacher, R.Erickson, A.Feltham, H.Fonvieille, E.Frlez, R.Gearhart, V.Ghazikhanian, J.Gomez, K.A.Griffioen, C.Harris, M.A.Houlden, E.W.Hughes, C.E.Hyde-Wright, G.Igo, S.Incerti, J.Jensen, J.R.Johnson, P.M.King, Yu.G.Kolomensky, S.E.Kuhn, R.Lindgren, R.M.Lombard-Nelsen, J.Marroncle, J.McCarthy, P.McKee, W.Meyer, G.Mitchell, J.Mitchell, M.Olson, S.Penttila, G.Peterson, G.G.Petratos, R.Pitthan, D.Pocanic, R.Prepost, C.Prescott, L.M.Qin, B.A.Raue, D.Reyna, L.S.Rochester, S.Rock, O.A.Rondon-Aramayo, F.Sabatie, I.Sick, T.Smith, L.Sorrell, F.Staley, S.St.Lorant, L.M.Stuart, Z.Szalata, Y.Terrien, A.Tobias, L.Todor, T.Toole, S.Trentalange, D.Walz, R.C.Welsh, F.R.Wesselmann, T.R.Wright, C.C.Young, M.Zeier, H.Zhu, B.Zihlmann

Measurement of the Deuteron Spin Structure Function g1d(x) for 1 (GeV/c)2 < Q2 < 40 (GeV/c)2

NUCLEAR REACTIONS 2H, 6Li(polarized e, e'X), E=48.3 GeV; measured electrons σ(θ), longitudinal asymmetries. 2H deduced spin structure function.

doi: 10.1016/S0370-2693(99)00940-5
Citations: PlumX Metrics


1998LA01      Phys.Rev.Lett. 80, 1597 (1998)

J.B.Lange, F.Duncan, A.Ambardar, A.Feltham, G.Hofman, R.R.Johnson, G.Jones, M.Pavan, K.J.Raywood, D.Vetterli, J.T.Brack, D.Ottewell, G.R.Smith, M.E.Sevior

Determination of the π± p → π±π+n Cross Section Near Threshold

NUCLEAR REACTIONS 1H(π-, nπ+π-), (π+, n2π+), E = 180-200 MeV; measured σ; deduced matrix elements, pion-pion scattering lengths.

doi: 10.1103/PhysRevLett.80.1597
Citations: PlumX Metrics


1997FE01      Phys.Rev. C55, 19 (1997)

A.Feltham, G.Jones, R.Olszewski, M.Pavan, M.Sevior, R.P.Trelle, P.Weber, G.J.Lolos, E.L.Mathie, Z.Papandreou, R.Rui, D.Gill, D.Healey, D.Ottewell, G.Sheffer, G.R.Smith, V.Sossi, G.Wait, P.Walden

Spin-Transfer Measurements of the πd(pol) p(pol)p Reaction Energies Spanning the Δ Resonance

NUCLEAR REACTIONS 2H(π, p), E=105-255 MeV; measured proton polarization, analyzing power, spin transfer observables. Polarized target.

doi: 10.1103/PhysRevC.55.19
Citations: PlumX Metrics


1996AB02      Phys.Rev.Lett. 76, 587 (1996)

K.Abe, T.Akagi, P.L.Anthony, R.Antonov, R.G.Arnold, T.Averett, H.R.Band, J.M.Bauer, H.Borel, P.E.Bosted, V.Breton, J.Button-Shafer, J.P.Chen, T.E.Chupp, J.Clendenin, C.Comptour, K.P.Coulter, G.Court, D.Crabb, M.Daoudi, D.Day, F.S.Dietrich, J.Dunne, H.Dutz, R.Erbacher, J.Fellbaum, A.Feltham, H.Fonvieille, E.Frlez, D.Garvey, R.Gearhart, J.Gomez, P.Grenier, K.A.Griffioen, S.Hoibraten, E.W.Hughes, C.Hyde-Wright, J.R.Johnson, D.Kawall, A.Klein, S.E.Kuhn, M.Kuriki, R.Lindgren, T.J.Liu, R.M.Lombard-Nelsen, J.Marroncle, T.Maruyama, X.K.Maruyama, J.McCarthy, W.Meyer, Z.-E.Meziani, R.Minehart, J.Mitchell, J.Morgenstern, G.G.Petratos, R.Pitthan, D.Pocanic, C.Prescott, R.Prepost, P.Raines, B.Raue, D.Reyna, A.Rijllart, Y.Roblin, L.S.Rochester, S.E.Rock, O.A.Rondon, I.Sick, L.C.Smith, T.B.Smith, M.Spengos, F.Staley, P.Steiner, S.St.Lorant, L.M.Stuart, F.Suekane, Z.M.Szalata, H.Tang, Y.Terrien, T.Usher, D.Walz, J.L.White, K.Witte, C.C.Young, B.Youngman, H.Yuta, G.Zapalac, B.Zihlmann, D.Zimmermann, and the E143 Collaboration

Measurements of the Proton and Deuteron Spin Structure Function g2 and Asymmetry A2

NUCLEAR STRUCTURE 1,2H; analyzed data; deduced spin structure function, asymmetry data. Polarized ammonia targets, (polarized e, e') reaction.

NUCLEAR REACTIONS 1,2H(polarized e, e'), E=29.1 GeV; measured spin asymmetries. 1,2H deduced spin structure functions. Polarized ammonia targets.

doi: 10.1103/PhysRevLett.76.587
Citations: PlumX Metrics


1995AB02      Phys.Rev.Lett. 74, 346 (1995)

K.Abe, T.Akagi, P.L.Anthony, R.Antonov, R.G.Arnold, T.Averett, H.R.Band, J.M.Bauer, H.Borel, P.E.Bosted, V.Breton, J.Button-Shafer, J.P.Chen, T.E.Chupp, J.Clendenin, C.Comptour, K.P.Coulter, G.Court, D.Crabb, M.Daoudi, D.Day, F.S.Dietrich, J.Dunne, H.Dutz, R.Erbacher, J.Fellbaum, A.Feltham, H.Fonvieille, E.Frlez, D.Garvey, R.Gearhart, J.Gomez, P.Grenier, K.A.Griffioen, S.Hoibraten, E.W.Hughes, C.Hyde-Wright, J.R.Johnson, D.Kawall, A.Klein, S.E.Kuhn, M.Kuriki, R.Lindgren, T.J.Liu, R.M.Lombard-Nelsen, J.Marroncle, T.Maruyama, X.K.Maruyama, J.McCarthy, W.Meyer, Z.-E.Meziani, R.Minehart, J.Mitchell, J.Morgenstern, G.G.Petratos, R.Pitthan, D.Pocanic, C.Prescott, R.Prepost, P.Raines, B.Raue, D.Reyna, A.Rijllart, Y.Roblin, L.S.Rochester, S.E.Rock, O.A.Rondon, I.Sick, L.C.Smith, T.B.Smith, M.Spengos, F.Staley, P.Steiner, S.St.Lorant, L.M.Stuart, F.Suekane, Z.M.Szalata, H.Tang, Y.Terrien, T.Usher, D.Walz, J.L.White, K.Witte, C.C.Young, B.Youngman, H.Yuta, G.Zapalac, B.Zihlmann, D.Zimmermann, and the E143 Collaboration

Precision Measurement of the Proton Spin Structure Function g1(p)

NUCLEAR REACTIONS 1H(polarized e, e'), E=9.7-29.1 GeV; measured asymmetry. 1H deduced spin structure function g1(p). Polarized 15NH3 target.

doi: 10.1103/PhysRevLett.74.346
Citations: PlumX Metrics


1994KO06      Phys.Rev. C49, 1715 (1994)

M.Kohler, B.E.King, N.R.Stevenson, R.B.Schubank, Y.M.Shin, R.A.Ristinen, P.Amaudruz, P.P.J.Delheij, D.C.Healey, B.K.Jennings, D.F.Ottewell, G.Sheffer, G.R.Smith, G.D.Wait, J.T.Brack, A.Feltham, M.Hanna, R.R.Johnson, F.M.Rozon, V.Sossi, D.Vetterli, P.Weber, N.Grion, R.Rui, E.L.Mathie, R.Tacik, M.Yeomans, C.A.Gossett, G.J.Wagner, J.M.Lee, K.S.Chung

Vector Analyzing Power iT11 in πd Elastic Scattering at 49 MeV

NUCLEAR REACTIONS 2H(π+, π+), (π-, π-), E=49 MeV; measured iT11(θ); deduced πNP11 amplitude role. Model comparison. Dynamically polarized target, magnetic spectrometer.

doi: 10.1103/PhysRevC.49.1715
Citations: PlumX Metrics


1993AC01      Phys.Lett. 300B, 19 (1993)

J.Aclander, S.May Tal-Beck, A.Altman, D.Ashery, H.Hahn, M.A.Moinester, A.Rahav, A.Feltham, G.Jones, M.Pavan, M.Sevior, D.Hutcheon, D.Ottewell, G.R.Smith, J.A.Niskanen

Proton Polarization from π+ Absorption in 4He

NUCLEAR REACTIONS 3,4He(π+, pX), E=120, 250 MeV; 2H(π+, p), E=120, 250 MeV; measured proton polarization, undetected nucleon yield.

doi: 10.1016/0370-2693(93)90741-Y
Citations: PlumX Metrics


1993SE10      Phys.Rev. D48, 3987 (1993)

M.E.Sevior, A.Ambardar, J.T.Brack, P.Camerini, F.Duncan, J.Ernst, A.Feltham, N.Grion, R.R.Johnson, G.Koch, O.Meirav, D.F.Ottewell, R.Rui, G.R.Smith, V.Sossi, D.Theis, D.Vetterli

Experimental Study of the Near Threshold π+p → π+π+n Cross Section and Chiral Symmetry

NUCLEAR REACTIONS 1H(π+, 2π+), E=180-200 MeV; measured σ(E); deduced ππ-amplitude, scattering length. Quark loop anomalies dominance model.

doi: 10.1103/PhysRevD.48.3987
Citations: PlumX Metrics


1992BR02      Phys.Rev. C45, 698 (1992)

J.T.Brack, A.Feltham, R.R.Johnson, G.Jones, M.A.Kermani, O.Meirav, M.Pavan, M.E.Sevior, V.Sossi, D.Vetterli, P.Weber, G.R.Smith, P.A.Amaudruz, D.Healey, D.F.Ottewell, Y.S.Wu, X.Y.Chen, S.Hoibraten, M.D.Kohler, J.J.Kraushaar, R.A.Ristinen, W.R.Smythe, E.L.Mathie, D.M.Yeomans, R.Schubank, N.R.Stevenson, E.F.Gibson

Analyzing Powers for π±-13C(pol) Scattering at T(π) = 100 MeV

NUCLEAR REACTIONS 13C(π+, π+), (π-, π-), (π+, π+'), (π-, π-'), E=100 MeV; measured analyzing power. Polarized target. Model analysis.

doi: 10.1103/PhysRevC.45.698
Citations: PlumX Metrics


1992MA17      Phys.Rev.Lett. 68, 3012 (1992)

S.May Tal-Beck, J.Aclander, A.Altman, D.Ashery, H.Hahn, M.A.Moinester, A.Rahav, A.Feltham, G.Jones, M.Pavan, M.Sevior, D.Hutcheon, D.Ottewell, G.R.Smith, J.A.Niskanen

Proton Polarization from π+ Absorption in 3He

NUCLEAR REACTIONS 3He(π+, p), E=120, 250 MeV; measured proton polarization vs θ following pion absorption; deduced nuclear density dependence, short range correlations role. Quasideuteron absorption kinematics.

doi: 10.1103/PhysRevLett.68.3012
Citations: PlumX Metrics


1991FE05      Phys.Rev.Lett. 66, 2573 (1991)

A.Feltham, R.P.Trelle, G.Jones, D.Gill, D.Healey, G.J.Lolos, E.L.Mathie, R.Olszewski, D.Ottewell, Z.Papandreou, M.Pavan, R.Rui, M.Sevior, G.R.Smith, V.Sossi, G.Wait, P.Walden, P.Weber

Spin-Transfer Measurements of the πd(pol) → p(pol)p Reaction Spanning the Δ Resonance

NUCLEAR REACTIONS 2H(π, p), E=105-255 MeV; measured polarization observables. Polarized target.

doi: 10.1103/PhysRevLett.66.2573
Citations: PlumX Metrics


1991SE07      Phys.Rev.Lett. 66, 2569 (1991)

M.E.Sevior, A.Ambardar, J.T.Brack, P.Camerini, F.Duncan, J.Ernst, A.Feltham, N.Grion, R.R.Johnson, G.Koch, O.Meirav, D.F.Ottewell, R.Rui, G.R.Smith, V.Sossi, D.Theis, D.Vetterli

Measurement of the Near-Threshold H(π+, π+π+)n Cross Section and Chiral Symmetry

NUCLEAR REACTIONS 1H(π+, 2π+), E=180-200 MeV; measured σ(E); deduced ππ scattering length. Chiral pertubation theory, quark loop anomalies dominance.

doi: 10.1103/PhysRevLett.66.2569
Citations: PlumX Metrics


1991WE04      Phys.Rev. C43, 1553 (1991)

P.Weber, J.McAlister, R.Olszewski, A.Feltham, M.Hanna, R.R.Johnson, M.Pavan, C.Ponting, F.M.Rozon, M.Sevior, V.Sossi, D.Vetterli, D.Humphrey, G.J.Lolos, Z.Papandreou, R.Tacik, D.Ottewell, G.Sheffer, G.R.Smith, Y.Mardor, S.May-Tal

Multinucleon Pion Absorption in the 4He(π+, ppp)n Reaction

NUCLEAR REACTIONS 4He(π+, 3p), E=165 MeV; measured σ(θp1, θp2, θp3), missing momentum distributions, energy spectra; deduced 3p emission, pion absorption mechanism.

doi: 10.1103/PhysRevC.43.1553
Citations: PlumX Metrics


1990MA79      J.Phys.(Paris), Colloq.C-6, 383 (1990)

E.L.Mathie, D.M.Yeomans, G.M.Huber, G.J.Lolos, S.I.H.Naqvi, V.Pafilis, Z.Papandreou, A.Feltham, R.Olszewski, G.Jones, M.Pavan, M.Sevior, R.P.Trelle, P.Weber, D.Gill, D.Healey, D.F.Ottewell, G.R.Smith, G.Wait, P.Walden, R.Rui

Polarization Measurements in Pion Deuteron Breakup and Absorption

NUCLEAR REACTIONS 2H(π, πnp), E not given; measured tensor analyzing power vs proton momentum. Faddeev model analyses. Polarized target.


1990ST24      Phys.Rev.Lett. 65, 1987 (1990)

N.R.Stevenson, R.B.Schubank, Y.M.Shin, P.Amaudruz, P.P.J.Delheij, D.C.Healey, B.K.Jennings, D.F.Ottewell, G.Sheffer, G.R.Smith, G.D.Wait, J.T.Brack, A.Feltham, M.Hanna, R.R.Johnson, F.M.Rozon, V.Sossi, D.Vetterli, P.Weber, N.Grion, R.Rui, M.Kohler, R.A.Ristinen, E.L.Mathie, R.Tacik, M.Yeomans, C.A.Gossett, G.J.Wagner

Role of the πN P11 Interaction in πd Elastic Scattering at 50 MeV

NUCLEAR REACTIONS 2H(π+, π+), E=50 MeV; measured iT11(θ); deduced πN(P11) interaction amplitude role. Dynamically polarized target.

doi: 10.1103/PhysRevLett.65.1987
Citations: PlumX Metrics


1990ST33      J.Phys.(Paris), Colloq.C-6, 391 (1990)

N.R.Stevenson, R.B.Schubank, Y.M.Shin, P.Amaudruz, P.P.J.Delheij, D.C.Healey, B.K.Jennings, D.F.Ottewell, G.Sheffer, G.R.Smith, G.D.Wait, N.Grion, R.Rui, J.T.Brack, A.Feltham, M.Hanna, R.R.Johnson, F.M.Rozon, V.Sossi, D.Vetterli, P.Weber, M.Kohler, R.A.Ristinen, E.L.Mathie, R.Tacik, M.Yeomans, C.A.Gossett, G.J.Wagner, B.E.King

Analyzing Power Measurements in πd Elastic Scattering at 50 MeV

NUCLEAR REACTIONS 2H(π, π), E=50 MeV; measured iT11(θ); deduced πN(P11) potential role.


1989PO11      Phys.Rev.Lett. 63, 1792 (1989)

C.Ponting, D.A.Hutcheon, M.A.Moinester, P.L.Walden, D.R.Gill, R.R.Johnson, F.Duncan, G.Sheffer, P.Weber, V.Sossi, A.Feltham, M.Hanna, R.Olszewski, M.Pavan, F.M.Rozon, M.Sevior, D.Ashery, R.P.Trelle, H.Hahn, B.Mayer

Analyzing-Power Measurement in p(pol)n → π-pp(1S0): Pion absorption by quark clusters ( Question )

NUCLEAR REACTIONS 2H(polarized p, 2pπ-), E=400 MeV; measured analyzing power vs (θ(π)); deduced nucleon-nucleon interaction short range component role.

doi: 10.1103/PhysRevLett.63.1792
Citations: PlumX Metrics


1989SE12      Phys.Rev. C40, 2780 (1989)

M.E.Sevior, A.Feltham, P.Weber, G.R.Smith, D.R.Gill, D.Healey, D.Ottewell, G.D.Wait, J.T.Brack, M.Kohler, J.J.Kraushaar, D.Oakley, R.J.Peterson, R.A.Ristinen, E.L.Mathie, N.R.Stevenson, R.B.Schubank, E.Gibson, R.Arndt

Analyzing Power in π±p(pol) Elastic Scattering from T(π) = 98 to 263 MeV

NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), E=98-263 MeV; measured analyzing power vs θ; deduced πp phase shifts. Polarized target.

doi: 10.1103/PhysRevC.40.2780
Citations: PlumX Metrics


1989WE11      Phys.Lett. 230B, 31 (1989)

P.Weber, J.McAlister, R.Olszewski, A.Feltham, M.Hanna, D.Humphrey, R.R.Johnson, G.J.Lolos, Y.Mardor, S.May-Tal, D.Ottewell, Z.Papandreou, M.Pavan, C.Ponting, F.M.Rozon, M.Sevior, G.Sheffer, G.R.Smith, V.Sossi, R.Tacik, D.Vetterli

Multi-Nucleon Pion Absorption in the 4He(π+, ppp)n Reaction

NUCLEAR REACTIONS 4He(π+, 3p), E=165 MeV; measured proton triple coincidences, σ(θ); deduced pion absorption mechanism. Kinematically complete experiment.

doi: 10.1016/0370-2693(89)91648-1
Citations: PlumX Metrics


1989WE14      Phys.Lett. 233B, 281 (1989)

P.Weber, J.McAlister, R.Olszewski, A.Feltham, M.Hanna, D.Humphrey, R.R.Johnson, G.J.Lolos, Y.Mardor, S.May-Tal, D.Ottewell, Z.Papandreou, M.Pavan, C.Ponting, F.M.Rozon, M.Sevior, G.Sheffer, G.R.Smith, V.Sossi, R.Tacik, D.Vetterli

Multi-Nucleon Pion Absorption in the 4He(π+, ppp)n Reaction

NUCLEAR REACTIONS 4He(π+, 3p), E=165 MeV; measured σ(θ1, θ2, θ3); deduced pion absorption mechanism. Kinematically complete experiment.

doi: 10.1016/0370-2693(89)91310-5
Citations: PlumX Metrics


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