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Photoproduction of the $Σ^{+}$ hyperon using linearly polarized photons with CLAS

L. Clark^1,*, B. McKinnon ^1,†, D. G. Ireland¹, D. I. Glazier¹, K. Livingston¹, D. Rönchen², A. G. Acar⁴⁵, P. Achenbach⁴⁰, J. S. Alvarado²³ et al. (The CLAS Collaboration)

J. S. Alvarado²³, M. J. Amaryan³³, W. R. Armstrong³, H. Atac³⁹, L. Baashen^14,‡, L. Barion¹⁸, M. Battaglieri¹⁹, B. Benkel²⁰, F. Benmokhtar¹¹, A. Bianconi^22,42, A. S. Biselli¹², W. A. Booth⁴⁵, F. Bossù⁷, K.-Th. Brinkmann³⁴, W. J. Briscoe¹⁶, W. K. Brooks⁴¹, S. Bueltmann³³, T. Cao⁴⁰, R. Capobianco⁹, D. S. Carman⁴⁰, A. Celentano¹⁹, P. Chatagnon⁴⁰, G. Ciullo^13,18, P. L. Cole²⁶, M. Contalbrigo¹⁸, A. D'Angelo^20,36, N. Dashyan⁴⁸, R. De Vita^19,§, M. Defurne⁷, A. Deur⁴⁰, S. Diehl^34,9, C. Djalali³², M. Dugger⁴, R. Dupre²³, H. Egiyan⁴⁰, A. El Alaoui⁴¹, L. El Fassi²⁸, P. Eugenio¹⁵, S. Fegan⁴⁵, R. F. Ferguson¹, A. Filippi²¹, C. Fogler³³, K. Gates¹, G. Gavalian^29,40, G. P. Gilfoyle⁴⁴, A. A. Golubenko³⁷, R. W. Gothe³⁸, M. Guidal²³, H. Hakobyan⁴¹, M. Hattawy³³, F. Hauenstein⁴⁰, T. B. Hayward⁹, D. Heddle^8,40, A. Hobart²³, M. Holtrop²⁹, E. L. Isupov³⁷, D. Jenkins⁴⁶, H. Jiang¹, H. S. Jo²⁵, D. Keller⁴⁷, M. Khandaker^31,∥, W. Kim²⁵, F. J. Klein^6,14, V. Klimenko⁹, A. Kripko³⁴, V. Kubarovsky⁴⁰, L. Lanza^20,36, P. Lenisa^18,13, X. Li²⁷, I. J. D. MacGregor¹, D. Marchand²³, V. Mascagna^22,42, D. Matamoros²³, S. Migliorati^22,42, V. Mokeev⁴⁰, C. Munoz Camacho²³, P. Nadel-Turonski⁴⁰, K. Neupane³⁸, S. Niccolai²³, G. Niculescu^24,32, M. Osipenko¹⁹, P. Pandey²⁷, M. Paolone³⁰, L. L. Pappalardo^13,18, R. Paremuzyan⁴⁰, E. Pasyuk^4,40, S. J. Paul⁴³, W. Phelps⁸, N. Pilleux²³, M. Pokhrel³³, S. Polcher Rafael⁷, Y. Prok^33,47, T. Reed¹⁴, J. Richards⁹, M. Ripani¹⁹, B. G. Ritchie⁴, J. Ritman¹⁷, G. Rosner¹, C. Salgado³¹, S. Schadmand¹⁷, A. Schmidt¹⁶, R. A. Schumacher⁵, Y. G. Sharabian⁴⁰, E. V. Shirokov³⁷, U. Shrestha⁹, D. Sokhan¹, N. Sparveris³⁹, M. Spreafico¹⁹, S. Stepanyan⁴⁰, I. I. Strakovsky¹⁶, S. Strauch³⁸, J. A. Tan²⁵, M. Tenorio³³, N. Trotta⁹, R. Tyson⁴⁰, M. Ungaro^35,40, L. Venturelli^22,42, H. Voskanyan⁴⁸, E. Voutier²³, D. P. Watts⁴⁵, X. Wei⁴⁰, R. Williams⁴⁵, L. Xu²³, N. Zachariou⁴⁵, Z. W. Zhao¹⁰, and M. Zurek³ (The CLAS Collaboration)

¹University of Glasgow, Glasgow G12 8QQ, United Kingdom
²Institute for Advanced Simulation (IAS-4), Forschungszentrum Jülich, 52425 Jülich, Germany
³Argonne National Laboratory, Argonne, Illinois 60439, USA
⁴Arizona State University, Tempe, Arizona 85287-1504, USA
⁵Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
⁶Catholic University of America, Washington, DC 20064, USA
⁷IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
⁸Christopher Newport University, Newport News, Virginia 23606, USA
⁹University of Connecticut, Storrs, Connecticut 06269, USA
¹⁰Duke University, Durham, North Carolina 27708-0305, USA
¹¹Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA
¹²Fairfield University, Fairfield, Connecticut 06824, USA
¹³Universita' di Ferrara, 44121 Ferrara, Italy
¹⁴Florida International University, Miami, Florida 33199, USA
¹⁵Florida State University, Tallahassee, Florida 32306, USA
¹⁶The George Washington University, Washington, DC 20052, USA
¹⁷GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
¹⁸INFN, Sezione di Ferrara, 44100 Ferrara, Italy
¹⁹INFN, Sezione di Genova, 16146 Genova, Italy
²⁰INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
²¹INFN, Sezione di Torino, 10125 Torino, Italy
²²INFN, Sezione di Pavia, 27100 Pavia, Italy
²³Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
²⁴James Madison University, Harrisonburg, Virginia 22807, USA
²⁵Kyungpook National University, Daegu 41566, Republic of Korea
²⁶Lamar University, 4400 MLK Blvd, PO Box 10046, Beaumont, Texas 77710, USA
²⁷Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
²⁸Mississippi State University, Mississippi State, Mississippi 39762-5167, USA
²⁹University of New Hampshire, Durham, New Hampshire 03824-3568, USA
³⁰New Mexico State University, PO Box 30001, Las Cruces, New Mexico 88003, USA
³¹Norfolk State University, Norfolk, Virginia 23504, USA
³²Ohio University, Athens, Ohio 45701, USA
³³Old Dominion University, Norfolk, Virginia 23529, USA
³⁴II Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany
³⁵Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
³⁶Università di Roma Tor Vergata, 00133 Rome, Italy
³⁷Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
³⁸University of South Carolina, Columbia, South Carolina 29208, USA
³⁹Temple University, Philadelphia, Pennsylvania 19122, USA
⁴⁰Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
⁴¹Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
⁴²Università degli Studi di Brescia, 25123 Brescia, Italy
⁴³University of California Riverside, 900 University Avenue, Riverside, California 92521, USA
⁴⁴University of Richmond, Richmond, Virginia 23173, USA
⁴⁵University of York, York YO10 5DD, United Kingdom
⁴⁶Virginia Tech, Blacksburg, Virginia 24061-0435, USA
⁴⁷University of Virginia, Charlottesville, Virginia 22901, USA
⁴⁸Yerevan Physics Institute, 375036 Yerevan, Armenia

^*Present address: Information Services, Durham University, UK.
^†Contact author: Bryan.McKinnon@glasgow.ac.uk
^‡Present address: King Saud University, Riyadh, Saudi Arabia.
^§Present address: Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
^∥Present address: Idaho State University, Pocatello, Idaho 83209, USA.

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Phys. Rev. C 111, 025204 – Published 20 February, 2025

DOI: https://doi.org/10.1103/PhysRevC.111.025204

Abstract

Background: Measurements of the polarization observables $Σ, P, T, O_{x}, O_{z}$ for the reaction $\vec{γ} p \to K_{S}^{0} Σ^{+}$ using a linearly polarized photon beam of energy 1.1 to 2.1 GeV are reported.

Purpose: The measured data provide information on a channel that has not been studied extensively, but is required for a full coupled-channel analysis in the nucleon resonance region.

Method: Observables have been simultaneously extracted using likelihood sampling with a Markov-Chain Monte Carlo process.

Results: Angular distributions in bins of photon energy $E_{γ}$ are produced for each polarization observable. $T, O_{x}$ , and $O_{z}$ are first time measurements of these observables in this reaction. The extraction of $Σ$ extends the energy range beyond a previous measurement. The measurement of $P$ , the recoil polarization, is consistent with previous measurements.

Conclusions: The measured data are shown to be significant enough to affect the estimation of the nucleon resonance parameters when fitted within a coupled-channels model.

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References (29)

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Phys. Rev. C 111, 025204– Published 20 February, 2025

Vol. 111, Iss. 2 — February 2025

Received 30 April 2024
Accepted 3 February 2025

DOI: https://doi.org/10.1103/PhysRevC.111.025204

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physical Review C

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Photoproduction of the $Σ^{+}$ hyperon using linearly polarized photons with CLAS

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Photoproduction of the Σ+ hyperon using linearly polarized photons with CLAS

Abstract

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References (29)

Photoproduction of the $Σ^{+}$ hyperon using linearly polarized photons with CLAS