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Observation of large missing-momentum (e,e′p) cross-section scaling and the onset of correlated-pair dominance in nuclei

I. Korover1,*, A. W. Denniston1,*, A. Kiral1, A. Schmidt3, A. Lovato6, N. Rocco7, A. Nikolakopoulos7, L. B. Weinstein4, E. Piasetzky2 et al. (CLAS Collaboration)

E. Piasetzky2, O. Hen1,†, M. J. Amaryan4, Giovanni Angelini3, H. Atac45, N. A. Baltzell5, L. Barion21, M. Battaglieri5,23, I. Bedlinskiy34, Fatiha Benmokhtar16, A. Bianconi48,27, L. Biondo23,26,49, A. S. Biselli17,10, F. Bossù12, S. Boiarinov5, W. J. Briscoe3, D. Bulumulla4, V. D. Burkert5, D. S. Carman5, J. C. Carvajal19, M. Caudron28, P. Chatagnon28, T. Chetry33, G. Ciullo21,18, L. Clark50, P. L. Cole32,11,5, M. Contalbrigo21, G. Costantini48,27, A. D'Angelo24,42, N. Dashyan54, R. De Vita23, M. Defurne12, A. Deur5, S. Diehl39,14, C. Djalali38, M. Duer55, R. Dupre28, H. Egiyan5, M. Ehrhart6, A. El Alaoui46, L. El Fassi33, L. Elouadrhiri5, P. Eugenio20, S. Fegan51, R. Fersch13, A. Filippi25, G. Gavalian5,35, Y. Ghandilyan54, G. P. Gilfoyle41, F. X. Girod5, A. A. Golubenko43, R. W. Gothe44, K. A. Griffioen53, M. Guidal28, L. Guo19,5, K. Hafidi6, H. Hakobyan46,54, M. Hattawy4, T. B. Hayward14, D. Heddle13,5, K. Hicks38, A. Hobart28, M. Holtrop35, C. E. Hyde4, Y. Ilieva44,3, D. G. Ireland50, E. L. Isupov43, H. S. Jo31, K. Joo14, S. Joosten6, D. Keller52, A. Khanal19, M. Khandaker37,‡, A. Kim14, W. Kim31, A. Kripko39, V. Kubarovsky5,40, L. Lanza24, M. Leali48,27, P. Lenisa21,18, K. Livingston50, I. J. D. MacGregor50, D. Marchand28, L. Marsicano23, V. Mascagna47,27,§, B. McKinnon50, S. Migliorati48,27, M. Mirazita22, V. Mokeev5,43, C. Munoz Camacho28, P. Nadel-Turonski5, K. Neupane44, S. Niccolai28, G. Niculescu30, T. R. O'Connell14, M. Osipenko23, A. I. Ostrovidov20, P. Pandey4, M. Paolone36, L. L. Pappalardo21,18, R. Paremuzyan5, E. Pasyuk5, O. Pogorelko34, M. Pokhrel4, J. Poudel4, J. W. Price8, Y. Prok4,52, B. A. Raue19,5, Trevor Reed19, M. Ripani23, J. Ritman29, A. Rizzo24,42, G. Rosner50, P. Rossi5, J. Rowley38, F. Sabatié12, R. A. Schumacher10, E. P. Segarra1, Y. G. Sharabian5, E. V. Shirokov43, U. Shrestha14, O. Soto22, N. Sparveris45, S. Stepanyan5, I. I. Strakovsky3, S. Strauch44,3, R. Tyson50, M. Ungaro5,40, L. Venturelli48,27, H. Voskanyan54, A. Vossen15,5, E. Voutier28, Kevin Wei14, X. Wei5, R. Wishart50, M. H. Wood9,44, B. Yale53, N. Zachariou51, J. Zhang52, and Z.W. Zhao15 (CLAS Collaboration)

  • 1Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 2School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
  • 3The George Washington University, Washington D.C. 20052, USA
  • 4Old Dominion University, Norfolk, Virginia 23529, USA
  • 5Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
  • 6Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
  • 7Theoretical Physics Department, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USA
  • 8California State University, Dominguez Hills, Carson, California 90747, USA
  • 9Canisius College, Buffalo, New York, USA
  • 10Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
  • 11Catholic University of America, Washington D.C. 20064, USA
  • 12IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
  • 13Christopher Newport University, Newport News, Virginia 23606, USA
  • 14University of Connecticut, Storrs, Connecticut 06269, USA
  • 15Duke University, Durham, North Carolina 27708-0305, USA
  • 16Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA
  • 17Fairfield University, Fairfield, Connecticut 06824, USA
  • 18Universita' di Ferrara, 44121 Ferrara, Italy
  • 19Florida International University, Miami, Florida 33199, USA
  • 20Florida State University, Tallahassee, Florida 32306, USA
  • 21INFN, Sezione di Ferrara, 44100 Ferrara, Italy
  • 22INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
  • 23INFN, Sezione di Genova, 16146 Genova, Italy
  • 24INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
  • 25INFN, Sezione di Torino, 10125 Torino, Italy
  • 26INFN, Sezione di Catania, 95123 Catania, Italy
  • 27INFN, Sezione di Pavia, 27100 Pavia, Italy
  • 28Universit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
  • 29Institute fur Kernphysik (Jülich), Jülich, Germany
  • 30James Madison University, Harrisonburg, Virginia 22807, USA
  • 31Kyungpook National University, Daegu 41566, Republic of Korea
  • 32Lamar University, 4400 MLK Blvd, PO Box 10046, Beaumont, Texas 77710, USA
  • 33Mississippi State University, Mississippi State, Mississippi 39762-5167, USA
  • 34National Research Centre Kurchatov Institute - ITEP, Moscow, 117259, Russia
  • 35University of New Hampshire, Durham, New Hampshire 03824-3568, USA
  • 36New Mexico State University, PO Box 30001, Las Cruces, New Mexico 88003, USA
  • 37Norfolk State University, Norfolk, Virginia 23504, USA
  • 38Ohio University, Athens, Ohio 45701, USA
  • 39II Physikalisches Institut der Universität Gießen, 35392 Gießen, Germany
  • 40Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
  • 41University of Richmond, Richmond, Virginia 23173, USA
  • 42Universita' di Roma Tor Vergata, 00133 Rome, Italy
  • 43Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
  • 44University of South Carolina, Columbia, South Carolina 29208, USA
  • 45Temple University, Philadelphia, Pennsylvania 19122, USA
  • 46Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
  • 47Università degli Studi dell'Insubria, 22100 Como, Italy
  • 48Universit‘a degli Studi di Brescia, 25123 Brescia, Italy
  • 49Universit‘a degli Studi di Messina, 98166 Messina, Italy
  • 50University of Glasgow, Glasgow G12 8QQ, United Kingdom
  • 51University of York, York YO10 5DD, United Kingdom
  • 52University of Virginia, Charlottesville, Virginia 22901, USA
  • 53College of William and Mary, Williamsburg, Virginia 23187-8795, USA
  • 54Yerevan Physics Institute, 375036 Yerevan, Armenia
  • 55Technische Universitt Darmstadt, Fachbereich Physik, Darmstadt, Germany

  • *These authors contributed equally to this work.
  • †Corresponding author: hen@mit.edu
  • ‡Present address: Idaho State University, Pocatello, Idaho 83209, USA
  • §Present address: Universit‘a degli Studi di Brescia, 25123 Brescia, Italy

Phys. Rev. C 107, L061301 – Published 6 June, 2023

DOI: https://doi.org/10.1103/PhysRevC.107.L061301

Abstract

We report the measurement of xB scaling in (e,e′p) cross-section ratios off nuclei relative to deuterium at large missing momentum of 350≤pmiss≤600 MeV/c. The observed scaling extends over a kinematic range of 0.7≤xB≤1.8, which is significantly wider than 1.4≤xB≤1.8 previously observed for inclusive (e,e′) cross-section ratios. The xB-integrated cross-section ratios become constant (i.e., scale) beginning at pmiss≈kF, the nuclear Fermi momentum. Comparing with theoretical calculations we find good agreement with generalized contact formalism calculations for high missing momentum (>375 MeV/c), suggesting the observed scaling results from interacting with nucleons in short-range correlated (SRC) pairs. For low missing momenta, mean-field calculations show good agreement with the data for pmiss<kF, and suggest a potential non-negligible contribution to the measured cross-section ratios from scattering off single, uncorrelated, nucleons up to pmiss≈350 MeV/c. Therefore, SRCs become dominant in nuclei at pmiss≈350 MeV/c, well above the nuclear Fermi Surface of kF≈250 MeV/c.

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