Photoproduction of Λ and Σ0 hyperons using linearly polarized photons

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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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
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.
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 (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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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
476351Nuclear Physics GroupGuenther RosnerScience & Technologies Facilities Council (STFC)ST/F012225/1P&A - PHYSICS & ASTRONOMY
653082Glasgow nuclear physics consolidated grantDavid IrelandScience & Technologies Facilities Council (STFC)ST/L005719/1S&E P&A - PHYSICS & ASTRONOMY
570711Nuclear Physics GroupDavid IrelandScience & Technologies Facilities Council (STFC)ST/J000175/1P&A - PHYSICS & ASTRONOMY