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    Beam-recoil transferred polarization in K+Y electroproduction in the nucleon resonance region with CLAS12

    D. S. Carman40,*, A. D'Angelo19,34, L. Lanza19, V. I. Mokeev40, K. P. Adhikari14, M. J. Amaryan31, W. R. Armstrong1, H. Atac38, H. Avakian40 et al. (CLAS Collaboration)

    H. Avakian40, C. Ayerbe Gayoso26,42, N. A. Baltzell40, L. Barion15, M. Battaglieri17,40, I. Bedlinskiy21, B. Benkel39, A. Bianconi2,18, A. S. Biselli7, M. Bondi17, S. Boiarinov40, F. Bossù35, W. J. Briscoe12, S. Bueltmann31, D. Bulumulla31, V. D. Burkert40, R. Capobianco6, J. C. Carvajal9, A. Celentano17, P. Chatagnon32, V. Chesnokov36, T. Chetry26,30, G. Ciullo8,15, L. Clark13, P. L. Cole24, M. Contalbrigo15, G. Costantini2,18, V. Crede10, N. Dashyan43, R. De Vita17, M. Defurne35, A. Deur40, S. Diehl6,11, C. Djalali30, R. Dupre32, M. Ehrhart1,32, A. El Alaoui39, L. El Fassi26, L. Elouadrhiri40, S. Fegan44, A. Filippi20, G. Gavalian40, Y. Ghandilyan43, G. P. Gilfoyle33, F. X. Girod40, D. I. Glazier13, A. A. Golubenko36, R. W. Gothe37, Y. Gotra40, K. A. Griffioen42, K. Hafidi1, H. Hakobyan39,43, M. Hattawy31, F. Hauenstein40, T. B. Hayward6,42, A. Hobart32, M. Holtrop27, Y. Ilieva37, D. G. Ireland13, E. L. Isupov36, H. S. Jo23, K. Joo6, D. Keller41, A. Khanal9, A. Kim6, W. Kim23, V. Klimenko6, A. Kripko11, V. Kubarovsky40, M. Leali2,18, S. Lee25, P. Lenisa8,15, K. Livingston13, I. J. D. MacGregor13, D. Marchand32, L. Marsicano17, V. Mascagna2,38, M. Mayer31, B. McKinnon13, S. Migliorati2,18, T. Mineeva39, M. Mirazita16, R. A. Montgomery13, C. Munoz Camacho32, P. Nadel-Turonski40, K. Neupane37, J. Newton31,40, S. Niccolai32, M. Osipenko17, P. Pandey31, M. Paolone28,38, L. L. Pappalardo8,15, R. Paremuzyan27,40, E. Pasyuk40, S. J. Paul3, N. Pilleux32, O. Pogorelko21, J. W. Price4, Y. Prok31, B. A. Raue9, T. Reed9, M. Ripani17, J. Ritman22, A. Rizzo19,34, P. Rossi40, F. Sabatié35, C. Salgado29, A. Schmidt12,25, Y. G. Sharabian40, E. V. Shirokov36, U. Shrestha6,30, P. Simmerling6, D. Sokhan13,35, N. Sparveris38, S. Stepanyan40, I. I. Strakovsky12, S. Strauch37, N. Tyler37, R. Tyson13, M. Ungaro40, S. Vallarino15, L. Venturelli2,18, H. Voskanyan43, E. Voutier32, D. P. Watts44, K. Wei6, X. Wei40, R. Wishart13, M. H. Wood5, B. Yale42, N. Zachariou44, J. Zhang41, and V. Ziegler40 (CLAS Collaboration)

    • 1Argonne National Laboratory, Argonne, Illinois 60439, USA
    • 2Università degli Studi di Brescia, 25123 Brescia, Italy
    • 3University of California Riverside, 900 University Avenue, Riverside, California 92521, USA
    • 4California State University, Dominguez Hills, Carson, California 90747, USA
    • 5Canisius College, Buffalo, New York 14208, USA
    • 6University of Connecticut, Storrs, Connecticut 06269, USA
    • 7Fairfield University, Fairfield, Connecticut 06824, USA
    • 8Università di Ferrara, 44121 Ferrara, Italy
    • 9Florida International University, Miami, Florida 33199, USA
    • 10Florida State University, Tallahassee, Florida 32306, USA
    • 11II Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany
    • 12The George Washington University, Washington, D.C. 20052, USA
    • 13University of Glasgow, Glasgow G12 8QQ, United Kingdom
    • 14Hampton University, Hampton, Virginia 23669, USA
    • 15INFN, Sezione di Ferrara, 44100 Ferrara, Italy
    • 16INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
    • 17INFN, Sezione di Genova, 16146 Genova, Italy
    • 18INFN, Sezione di Pavia, 27100 Pavia, Italy
    • 19INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
    • 20INFN, Sezione di Torino, 10125 Torino, Italy
    • 21National Research Center Kurchatov Institute, Institute of Theoretical and Experimental Physics, 117218 Moscow, Russia
    • 22Institute für Kernphysik, Forschungszentrum Jülich, 52425 Jülich, Germany
    • 23Kyungpook National University, Daegu 702-701, Republic of Korea
    • 24Lamar University, 4400 MLK Blvd, Beaumont, Texas 77710, USA
    • 25Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
    • 26Mississippi State University, Mississippi State, Mississippi 39762, USA
    • 27University of New Hampshire, Durham, New Hampshire 03824, USA
    • 28New Mexico State University, Las Cruces, New Mexico 88003, USA
    • 29Norfolk State University, Norfolk, Virginia 23504, USA
    • 30Ohio University, Athens, Ohio 45701, USA
    • 31Old Dominion University, Norfolk, Virginia 23529, USA
    • 32Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
    • 33University of Richmond, Richmond, Virginia 23173, USA
    • 34Università di Roma Tor Vergata, 00133 Rome, Italy
    • 35IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
    • 36Skobeltsyn Nuclear Physics Institute and Physics Department at Lomonosov Moscow State University, 119899 Moscow, Russia
    • 37University of South Carolina, Columbia, South Carolina 29208, USA
    • 38Temple University, Philadelphia, Pennsylvania 19122, USA
    • 39Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
    • 40Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
    • 41University of Virginia, Charlottesville, Virginia 22901, USA
    • 42College of William and Mary, Williamsburg, Virginia 23187, USA
    • 43Yerevan Physics Institute, 375036 Yerevan, Armenia
    • 44University of York, York YO10 5DD, United Kingdom

    • *Corresponding author: carman@jlab.org
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    Phys. Rev. C 105, 065201 – Published 1 June, 2022

    DOI: https://doi.org/10.1103/PhysRevC.105.065201

    Abstract

    Beam-recoil transferred polarizations for the exclusive electroproduction of K+Λ and K+Σ0 final states from an unpolarized proton target have been measured using the CLAS12 spectrometer at Jefferson Laboratory. The measurements at beam energies of 6.535 and 7.546 GeV span the range of four-momentum transfer Q2 from 0.3 to 4.5 GeV2 and invariant energy W from 1.6 to 2.4 GeV, while covering the full center-of-mass angular range of the K+. These new data extend the existing hyperon polarization data from CLAS in a similar kinematic range but from a significantly larger dataset. They represent an important addition to the world data, allowing for better exploration of the reaction mechanism in strangeness production processes, for further understanding of the spectrum and structure of excited nucleon states, and for improved insight into the strong interaction in the regime of nonperturbative dynamics.

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    Phys. Rev. C 105, 065201– Published 1 June, 2022
    • Received 7 February 2022
    • Accepted 19 May 2022
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