Beam-recoil polarization transfer in the nucleon resonance region in the exclusive e→p→e′K+Λ→ and e→p→e′K+Σ→0 reactions at the CLAS spectrometer

Carman, D. et al. (2009) Beam-recoil polarization transfer in the nucleon resonance region in the exclusive e→p→e′K+Λ→ and e→p→e′K+Σ→0 reactions at the CLAS spectrometer. Physical Review C, 79(6), 065205. (doi:10.1103/PhysRevC.79.065205)

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Abstract

Beam-recoil transferred polarizations for the exclusive e→p→e′K+Λ→,Σ→0 reactions have been measured using the Continuous Electron Beam Accelerator Facility's large acceptance spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. New measurements have been completed at beam energies of 4.261 and 5.754 GeV that span a range of momentum transfer Q2 from 0.7 to 5.4 GeV2, invariant energy W from 1.6 to 2.6 GeV, and the full center-of-mass angular range of the K+ meson. These new data add to the existing CLAS K+Λ measurements at 2.567 GeV, and provide the first-ever data for the K+Σ0 channel in electroproduction. Comparisons of the data with several theoretical models are used to study the sensitivity to s-channel resonance contributions and the underlying reaction mechanism. Interpretations within two semiclassical partonic models are made to probe the underlying reaction mechanism and the ss¯ quark-pair creation dynamics.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sokhan, Dr Daria and Livingston, Dr Kenneth and Protopopescu, Dr Dan and Ireland, Professor David and Rosner, Professor Guenther
Authors: Carman, D., Raue, B., Adhikari, K., Amaryan, M., Anghinolfi, M., Baghdasaryan, H., Battaglieri, M., Bellis, M., Biselli, A., Bookwalter, C., Branford, D., Briscoe, W., Brooks, W., Burkert, V., Cole, P., Collins, P., Crede, V., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Dhamija, S., Djalali, C., Dodge, G., Eugenio, P., Fedotov, G., Fegan, S., Fradi, A., Gabrielyan, M., Giovanetti, K., Girod, F., Gohn, W., Gonenc, A., Gothe, R., Hakobyan, H., Hanretty, C., Hassall, N., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Jo, H., Johnstone, J., Khetarpal, P., Kim, W., Kubarovsky, V., Kuznetsov, V., Livingston, K., Mayer, M., McCracken, M., Meyer, C., Mikhailov, K., Mineeva, T., Mirazita, M., Mokeev, V., Moreno, B., Moriya, K., Moteabbed, M., Nadel-Turonski, P., Niccolai, S., Niroula, M., Osipenko, M., Ostrovidov, A., Park, K., Park, S., Pasyuk, E., Pogorelko, O., Price, J., Protopopescu, D., Ricco, G., Ripani, M., Ritchie, B., Rosner, G., Rossi, P., Sabatie, F., Saini, M., Salgado, C., Sayre, D., Schott, D., Schumacher, R., Seraydaryan, H., Sharabian, Y., Sober, D., Sokhan, D., Stepanyan, S., Stepanyan, S., Strauch, S., Taiuti, M., Tedeschi, D., Tkachenko, S., Ungaro, M., Vineyard, M., Wolin, E., Wood, M., Zhang, J., and Zhao, B.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review C
ISSN:0556-2813
ISSN (Online):1089-490X
Published Online:23 June 2009

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