Paterson, C.A. et al. (2016) Photoproduction of Λ and Σ0 hyperons using linearly polarized photons. Physical Review C, 93(6), 065201. (doi: 10.1103/PhysRevC.93.065201)
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Abstract
Background: Measurements of polarization observables for the reactions γ⃗ p→K+Λ and γ⃗ p→K+Σ0 have been performed. This is part of a program of measurements designed to study the spectrum of baryon resonances in particular, and nonperturbative QCD in general. Purpose: The accurate measurement of several polarization observables provides tight constraints for phenomenological fits, which allow the study of strangeness in nucleon and nuclear systems. Beam-recoil observables for the γ⃗ p→K+Σ0 reaction have not been reported before now. Method: The measurements were carried out using linearly polarized photon beams incident on a liquid hydrogen target, and the CLAS detector at the Thomas Jefferson National Accelerator Facility. The energy range of the results is 1.71<W<2.19GeV, with an angular range −0.75<cosθ⋆K<+0.85. Results: The observables extracted for both reactions are beam asymmetry Σ, target asymmetry T, and the beam-recoil double polarization observables Ox and Oz. Conclusions: Comparison with theoretical fits indicates that, in the regions where no previous data existed, the new data contain significant new information, and strengthen the evidence for the set of resonances used in the latest Bonn-Gatchina fit.
| Item Type: | Articles |
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| Additional Information: | This work was supported by: the United Kingdom’s Science and Technology Facilities Council (STFC) from Grants No. ST/F012225/1, No. ST/J000175/1, and ST/L005719/1; the Chilean Comision Nacional de Investigaci ´ on Cient ´ ´ıfica y Tecnologica (CONICYT); the Italian Istituto Nazionale di ´ Fisica Nucleare; the French Centre National de la Recherche Scientifique; the French Commissariat a l’Energie Atomique; ` the U.S. National Science Foundation; and the National Research Foundation of Korea. Jefferson Science Associates, LLC, operates the Thomas Jefferson National Accelerator Facility for the the U.S. Department of Energy under Contract No. DE-AC05-06OR23177. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Sokhan, Dr Daria and McKinnon, Dr Bryan and Clark, Ms Louise and Ireland, Professor David and Livingston, Dr Kenneth and MacGregor, Professor Douglas and Glazier, Dr Derek and Rosner, Professor Guenther and Protopopescu, Dr Dan |
| Authors: | Paterson, C.A., Ireland, D.G., Livingston, K., McKinnon, B., Adikaram, D., Akbar, Z., Amaryan, M., Pereira, S. A., Badui, R.A., Ball, J., Baltzell, N.A., Battaglieri, M., Bedlinskiy, I., Biselli, A., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Carman, D.S., Celentano, A., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P.L., Compton, N., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., De Vita, R., Deur, A., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Fanchini, E., Fedotov, G., Filippi, A., Fleming, J.A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Glazier, D.I., Gleason, C., Gothe, R.W., Griffioen, K.A., Guo, L., Hafidi, K., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S.M., Ilieva, Y., Ishkhanov, B.S., Isupov, E.L., Jenkins, D., Jiang, H., Joo, K., Keller, D., Khachatryan, G., Khandaker, M., Kim, W., Klein, F.J., Kubarovsky, V., Kuleshov, S.V., Lanza, L., Lenisa, P., Lu, H.Y., MacGregor, I.J.D., Markov, N., Mattione, P., Mayer, C.A., McCracken, M.E., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Nadel-Turonski, P., Net, L.A., Ni, A., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A.I., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J.W., Prok, Y., Protopopescu, D., Puckett, A.J.R., Raue, B.A., Ripani, M., Ritchie, B.G., Rizzo, A., Rosner, G., Roy, P., Sabatie, F., Salgado, C., Schumacher, R.A., Seder, E., Sharabian, Y.G., Skorodumina, I., Smith, G.D., Sober, D.I., Sokhan, D., Sparveris, N., Strakovsky, I.I., Strauch, S., Sytnik, V., Taiuti, M., Torayev, B., Tucker, R., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N.K., Watts, D.P., Wei, X., Zachariou, N., Zana, L., Zhang, J., and Zonta, I. |
| 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 |
| Copyright Holders: | Copyright © 2016 C.A. Paterson et al |
| First Published: | First published in Physical Review C 93(6):065201 |
| Publisher Policy: | Reproduced under a creative commons license |
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