Differential cross section and recoil polarization measurements for the γp→K+Λ reaction using CLAS at Jefferson Lab

McCracken, M.E. et al. (2010) Differential cross section and recoil polarization measurements for the γp→K+Λ reaction using CLAS at Jefferson Lab. Physical Review C, 81(2), 025201. (doi:10.1103/PhysRevC.81.025201)

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Abstract

We present measurements of the differential cross section and Λ recoil polarization for the γp→K+Λ reaction made using the CLAS detector at Jefferson Lab. These measurements cover the center-of-mass energy range from 1.62 to 2.84 GeV and a wide range of center-of-mass K+ production angles. Independent analyses were performed using the K+pπ− and K+p (missing π−) final-state topologies; results from these analyses were found to exhibit good agreement. These differential-cross-section measurements show excellent agreement with previous CLAS and LEPS results and offer increased precision and a 300-MeV increase in energy coverage. The recoil polarization data agree well with previous results and offer a large increase in precision and a 500-MeV extension in energy range. The increased center-of-mass energy range that these data represent will allow for independent study of nonresonant K+Λ photoproduction mechanisms at all production angles.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sokhan, Dr Daria and Fegan, Mr Stuart and Protopopescu, Dr Dan and McKinnon, Dr Bryan and Livingston, Dr Kenneth and Ireland, Professor David and Hassall, Mr Neil and Rosner, Professor Guenther
Authors: McCracken, M.E., Bellis, M., Meyer, C.A., Williams, M., Adhikari, K.P., Anghinolfi, M., Ball, J., Battaglieri, M., Berman, B.L., Biselli, A.S., Branford, D., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Careccia, S.L., Carman, D.S., Cole, P.L., Collins, P., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Dey, B., Dhamija, S., Dickson, R., Djalali, C., Doughty, D., Dugger, M., Dupre, R., El Alaoui, A., Eugenio, P., Fegan, S., Fradi, A., Gabrielyan, M.Y., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gohn, W., Gothe, R.W., Griffioen, K.A., Guidal, M., Hafidi, K., Hakobyanm, H., Hanretty, C., Hassall, N., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Jo, H.S., Keller, D., Khandaker, M., Khetarpal, P., Kim, W., Klein, A., Klein, F.J., Kubarovsky, V., Kuleshov, S.V., Kuznetsov, V., Livingston, K., Mayer, M., McAndrew, J., McKinnon, B., Mestayer, M.D., Mineeva, T., Mirazita, M., Mokeev, V., Moreno, B., Moriya, K., Morrison, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Park, K., Park, S., Pasyuk, E., Pereira, S.A., Perrin, Y., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J.W., Procureur, S., Prok, Y., Protopopescu, D., Quinn, B., Raue, B.A., Ricco, G., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, P., Sabatie, F., Saini, M.S., Salamanca, J., Schott, D., Schumacher, R.A., Seder, E., Seraydaryan, H., Sharabian, Y.G., Sober, D.I., Sokhan, D., Stepanyan, S.S., Stoler, P., Strauch, S., Taiuti, M., Tedeschi, D.J., Tkachenko, S., Ungaro, M., Vernarsky, B., Vineyard, M.F., Watts, D., Voutier, E., Weinstein, L.B., Weygand, D.P., Wood, M.H., and Zana, L.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review C
Publisher:American Physical Society
ISSN:0556-2813
ISSN (Online):1089-490X
Published Online:11 February 2010

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