Search

Your search keyword '"Weinstein, L.B."' showing total 4 results
Start Over Author "Weinstein, L.B." Publisher american physical society
4 results on '"Weinstein, L.B."'

1. Investigation of the exclusive He-3(e,e ' pp)n reaction

Author

Groep, D.L., van Batenburg, M.F., Bauer, T.S., Blok, H.P., Boersma, D.J., Cisbani, E., De Leo, R., Frullani, S., Garibaldi, F., Glockle, W., Golak, J., Heimberg, P., Hesselink, W.H.A., Iodice, M., Ireland, D.G, Jans, E., Kamada, H., Lapikas, L., Lolos, G.J., Perrino, R., Scott, A., Starink, R., Steenbakkers, M.F.M., Urciuoli, G.M., de Vreis, H., Weinstein, L.B., and Witala, H.

Subjects
Nuclear Theory, Nuclear Experiment, QC
Abstract

Cross sections for the He-3(e, e'pp)n reaction were measured at an energy transfer of 220 MeV and three-momentum transfers q of 305, 375, and 445 MeV/c. Results are presented as a function of q and the final-state neutron momentum for slices in specific :kinematic variables. At low neutron momenta, comparison of the data to results of continuum Faddeev calculations performed with the Bonn-B nucleon-nucleon potential indicates a dominant role for two-proton knockout induced by a one-body hadronic current.

Published
1999

2. Recoil Polarization for Δ Excitation in Pion Electroproduction

Author

Kelly, J.J., Kelly, J.J., Roche, R.E., Chai, Z., Jones, M.K., Gayou, O., Sarty, A.J., Frullani, S., Aniol, K., Beise, E.J., Benmokhtar, F., Bertozzi, W., Boeglin, W.U., Botto, T., Brash, E.J., Breuer, H., Brown, E., Burtin, E., Calarco, J.R., Cavata, C., Chang, C.C., Chant, N.S., Chen, J.-P., Coman, M., Crovelli, D., De Leo, R., Dieterich, S., Escoffier, S., Fissum, K.G., Garde, V., Garibaldi, F., Georgakopoulus, S., Gilad, S., Gilman, R., Glashausser, C., Hansen, J.-O., Higinbotham, D.W., Hotta, A., Huber, G.M., Ibrahim, H., Iodice, M., de Jager, C.W., Jiang, X., Klimenko, A., Kozlov, A., Kumbartzki, G., Kuss, M., Lagamba, L., Laveissiere, G., LeRose, J.J., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Margaziotis, D.J., Marie, F., Markowitz, P., McAleer, S., Meekins, D., Michaels, R., Milbrath, B.D., Mitchell, J., Nappa, J., Neyret, D., Perdrisat, C.F., Potokar, M., Punjabi, V.A., Pussieux, T., Ransome, R.D., Roos, P.G., Rvachev, M., Saha, A., Sirca, S., Suleiman, R., Strauch, S., Templon, J.A., Todor, L., Ulmer, P.E., Urciuoli, G.M., Weinstein, L.B., Wijesooriya, K., Wojtsekhowski, B., Zheng, X., Zhu, L., Jefferson Laboratory E91011 and Hall A Collaborations, Kelly, J.J., Kelly, J.J., Roche, R.E., Chai, Z., Jones, M.K., Gayou, O., Sarty, A.J., Frullani, S., Aniol, K., Beise, E.J., Benmokhtar, F., Bertozzi, W., Boeglin, W.U., Botto, T., Brash, E.J., Breuer, H., Brown, E., Burtin, E., Calarco, J.R., Cavata, C., Chang, C.C., Chant, N.S., Chen, J.-P., Coman, M., Crovelli, D., De Leo, R., Dieterich, S., Escoffier, S., Fissum, K.G., Garde, V., Garibaldi, F., Georgakopoulus, S., Gilad, S., Gilman, R., Glashausser, C., Hansen, J.-O., Higinbotham, D.W., Hotta, A., Huber, G.M., Ibrahim, H., Iodice, M., de Jager, C.W., Jiang, X., Klimenko, A., Kozlov, A., Kumbartzki, G., Kuss, M., Lagamba, L., Laveissiere, G., LeRose, J.J., Lindgren, R.A., Liyanage, N., Lolos, G.J., Lourie, R.W., Margaziotis, D.J., Marie, F., Markowitz, P., McAleer, S., Meekins, D., Michaels, R., Milbrath, B.D., Mitchell, J., Nappa, J., Neyret, D., Perdrisat, C.F., Potokar, M., Punjabi, V.A., Pussieux, T., Ransome, R.D., Roos, P.G., Rvachev, M., Saha, A., Sirca, S., Suleiman, R., Strauch, S., Templon, J.A., Todor, L., Ulmer, P.E., Urciuoli, G.M., Weinstein, L.B., Wijesooriya, K., Wojtsekhowski, B., Zheng, X., Zhu, L., and Jefferson Laboratory E91011 and Hall A Collaborations

Abstract

We measured angular distributions of recoil-polarization response functions for neutral pion electroproduction for W=1.23 GeV at Q2=1.0 (GeV/c)2, obtaining 14 separated response functions plus 2 Rosenbluth combinations; of these, 12 have been observed for the first time. Dynamical models do not describe quantities governed by imaginary parts of interference products well, indicating the need for adjusting magnitudes and phases for nonresonant amplitudes. We performed a nearly model-independent multipole analysis and obtained values for Re (S1+/M1+)=-(6.84±0.15)% and Re (E1+/M1+)=-(2.91±0.19)% that are distinctly different from those from the traditional Legendre analysis based upon M1+ dominance and ℓπ≤1 truncation.

Published
2005

3. Cross-Section Measurement of Charged-Pion Photoproduction from Hydrogen and Deuterium

Author

Zhu, L.Y., Zhu, L.Y., Arrington, J., Averett, T., Beise, E., Calarco, J., Chang, T., Chen, J.P., Chudakov, E., Coman, M., Clasie, B., Crawford, C., Dieterich, S., Dohrmann, F., Dutta, D., Fissum, K., Frullani, S., Gao, H., Gilman, R., Glashausser, C., Gomez, J., Hafidi, K., Hansen, J.-O., Higinbotham, D.W., Holt, R.J., de Jager, C.W., Jiang, X., Kinney, E., Kramer, K., Kumbartzki, G., LeRose, J., Liyanage, N., Mack, D., Markowitz, P., McCormick, K., Meekins, D., Meziani, Z.-E., Michaels, R., Mitchell, J., Nanda, S., Potterveld, D., Ransome, R., Reimer, P.E., Reitz, B., Saha, A., Schulte, E.C., Seely, J., Sirca, S., Strauch, S., Sulkosky, V., Vlahovic, B., Weinstein, L.B., Wijesooriya, K., Williamson, C.F., Wojtsekhowski, B., Xiang, H., Xiong, F., Xu, W., Zeng, J., Zheng, X., Jefferson Lab Hall A Colloboration, Zhu, L.Y., Zhu, L.Y., Arrington, J., Averett, T., Beise, E., Calarco, J., Chang, T., Chen, J.P., Chudakov, E., Coman, M., Clasie, B., Crawford, C., Dieterich, S., Dohrmann, F., Dutta, D., Fissum, K., Frullani, S., Gao, H., Gilman, R., Glashausser, C., Gomez, J., Hafidi, K., Hansen, J.-O., Higinbotham, D.W., Holt, R.J., de Jager, C.W., Jiang, X., Kinney, E., Kramer, K., Kumbartzki, G., LeRose, J., Liyanage, N., Mack, D., Markowitz, P., McCormick, K., Meekins, D., Meziani, Z.-E., Michaels, R., Mitchell, J., Nanda, S., Potterveld, D., Ransome, R., Reimer, P.E., Reitz, B., Saha, A., Schulte, E.C., Seely, J., Sirca, S., Strauch, S., Sulkosky, V., Vlahovic, B., Weinstein, L.B., Wijesooriya, K., Williamson, C.F., Wojtsekhowski, B., Xiang, H., Xiong, F., Xu, W., Zeng, J., Zheng, X., and Jefferson Lab Hall A Colloboration

Abstract

We have measured the differential cross section for the γn→π-p and γp→π+n reactions at θc.m.=90° in the photon energy range from 1.1 to 5.5 GeV at Jefferson Lab (JLab). The data at Eγ≳3.3 GeV exhibit a global scaling behavior for both π- and π+ photoproduction, consistent with the constituent counting rule and the existing π+ photoproduction data. Possible oscillations around the scaling value are suggested by these new data. The data show enhancement in the scaled cross section at a center-of-mass energy near 2.2 GeV. The cross section ratio of exclusive π- to π+ photoproduction at high energy is consistent with the prediction based on one-hard-gluon-exchange diagrams.

Published
2003

4. Investigation of the exclusive 3He(e,e′pp)n reaction

Author

Groep, D.L, Batenburg, M.F.van, Bauer, Th.S., Blok, H. P., Boersma, D.J, Cisbani, E, Leo, R.De, Frullani, S, Garibaldi, F, Glockle, W, Golak, J, Heimberg, P, Hesselink, W.H.A, Iodice, M, Ireland, D.G, Jans, E, Kamada, Hiroyuki, Lapikas, L, Lolos, G.J, Onderwater, C.J.G, Perrino, R, Scott, A, Starink, R, Steenbakkers, M.F.M, Urciuoli, G.M., de Vries, H, Weinstein, L.B., and Witala, H

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

Cross sections for the 3He(e,e′pp)n reaction were measured over a wide range of energy and three-momentum transfer. At a momentum transfer q=375 MeV/c, data were taken at transferred energies ω ranging from 170 to 290 MeV. At ω=220 MeV, measurements were performed at three q values (305, 375, and 445 MeV/c). The results are presented as a function of the neutron momentum in the final state, as a function of the energy and momentum transfer, and as a function of the relative momentum of the two-proton system. The data at neutron momenta below 100 MeV/c, obtained for two values of the momentum transfer at ω=220 MeV, are well described by the results of continuum-Faddeev calculations. These calculations indicate that the cross section in this domain is dominated by direct two-proton emission induced by a one-body hadronic current. Cross section distributions determined as a function of the relative momentum of the two protons are fairly well reproduced by continuum-Faddeev calculations based on various realistic nucleon-nucleon potential models. At higher neutron momentum and at higher energy transfer, deviations between data and calculations are observed that may be due to contributions of isobar currents.

Published
2001

Catalog

Books, media, physical & digital resources
See catalog results