Improved Λp Elastic Scattering Cross Sections between 0.9 and 2.0 GeV/c as a Main Ingredient of the Neutron Star Equation of State

J Rowley¹, N Compton¹, C Djalali¹, K Hicks¹, J Price², N Zachariou³, K P Adhikari⁴, W R Armstrong⁵, H Atac⁶, L Baashen⁷, L Barion⁸, M Bashkanov³, M Battaglieri^{9

10}, I Bedlinskiy¹¹, F Benmokhtar¹², A Bianconi^{13

14}, L Biondo^{15

9

16}, A S Biselli¹⁷, M Bondi⁹, F Bossù¹⁸, S Boiarinov¹⁰, W J Briscoe¹⁹, W K Brooks²⁰, D Bulumulla⁴, V D Burkert¹⁰, D S Carman¹⁰, J C Carvajal⁷, A Celentano⁹, P Chatagnon²¹, V Chesnokov²², T Chetry²³, G Ciullo^{24

8}, L Clark²⁵, P L Cole²⁶, M Contalbrigo⁸, G Costantini^{13

14}, V Crede²⁷, A D'Angelo^{28

29}, N Dashyan³⁰, R De Vita⁹, M Defurne¹⁸, A Deur¹⁰, S Diehl^{31

32

33}, R Dupré²¹, H Egiyan^{34

10}, M Ehrhart⁵, A El Alaoui²⁰, L El Fassi^{5

23}, P Eugenio²⁷, G Fedotov²², S Fegan³, R Fersch^{35

36}, A Filippi³⁷, A Fradi²¹, G Gavalian^{4

10}, F X Girod^{18

10}, D I Glazier²⁵, A Golubenko²², R W Gothe³³, K Griffioen³⁶, L Guo⁷, K Hafidi⁵, H Hakobyan^{20

30}, M Hattawy⁴, T B Hayward³¹, D Heddle^{35

10}, A Hobart²¹, M Holtrop³⁴, Y Ilieva³³, D G Ireland²⁵, E L Isupov²², D Jenkins³⁸, H S Jo³⁹, K Joo³¹, D Keller^{1

40}, A Khanal⁷, M Khandaker⁴¹, A Kim³¹, I Korover⁴², A Kripko³², V Kubarovsky¹⁰, S E Kuhn⁴, L Lanza²⁸, M Leali^{13

14}, P Lenisa^{24

8}, K Livingston²⁵, I J D MacGregor²⁵, D Marchand²¹, N Markov^{31

10}, L Marsicano⁹, V Mascagna^{13

43}, M E McCracken⁴⁴, B McKinnon²⁵, C McLauchlin³³, Z E Meziani⁵, S Migliorati^{13

14}, T Mineeva^{31

20}, M Mirazita⁴⁵, V Mokeev^{22

10}, E Munevar¹⁹, C Munoz Camacho²¹, P Nadel-Turonski^{46

10}, K Neupane³³, S Niccolai²¹, G Niculescu⁴⁷, T R O'Connell³¹, M Osipenko⁹, A I Ostrovidov²⁷, P Pandey⁴, M Paolone⁴⁸, L L Pappalardo^{24

8}, E Pasyuk¹⁰, O Pogorelko¹¹, Y Prok^{4

40}, T Reed⁷, M Ripani⁹, J Ritman⁴⁹, A Rizzo^{28

29}, G Rosner²⁵, F Sabatie¹⁸, C Salgado⁴¹, A Schmidt¹⁹, R A Schumacher⁴⁴, Y G Sharabian¹⁰, U Shrestha³¹, D Sokhan²⁵, O Soto⁴⁵, N Sparveris⁶, I I Strakovsky¹⁹, S Strauch³³, R Tyson²⁵, M Ungaro^{31

10}, L Venturelli^{13

14}, H Voskanyan³⁰, A Vossen^{50

10}, E Voutier²¹, D P Watts³, K Wei³¹, X Wei¹⁰, R Wishart²⁵, M H Wood^{51

33}, B Yale³⁶, M Yurov³⁹, J Zhang^{4

40}, Z W Zhao^{50

33}; CLAS Collaboration

Affiliations

¹ Ohio University, Athens, Ohio 45701, USA.
² California State University, Dominguez Hills, Carson, California 90747, USA.
³ University of York, York YO10 5DD, United Kingdom.
⁴ Old Dominion University, Norfolk, Virginia 23529, USA.
⁵ Argonne National Laboratory, Argonne, Illinois 60439, USA.
⁶ Temple University, Philadelphia, Pennsylvania 19122, USA.
⁷ Florida International University, Miami, Florida 33199, USA.
⁸ INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
⁹ INFN, Sezione di Genova, 16146 Genova, Italy.
¹⁰ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
¹¹ National Research Centre Kurchatov Institute-ITEP, Moscow 117259, Russia.
¹² Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA.
¹³ INFN, Sezione di Pavia, 27100 Pavia, Italy.
¹⁴ Università degli Studi di Brescia, 25123 Brescia, Italy.
¹⁵ INFN, Sezione di Catania, 95123 Catania, Italy.
¹⁶ Universià degli Studi di Messina, 98166 Messina, Italy.
¹⁷ Fairfield University, Fairfield Connecticut 06824, USA.
¹⁸ IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
¹⁹ The George Washington University, Washington, D.C. 20052, USA.
²⁰ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
²¹ Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France.
²² Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
²³ Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
²⁴ Università di Ferrara, 44121 Ferrara, Italy.
²⁵ University of Glasgow, Glasgow G12 8QQ, United Kingdom.
²⁶ Lamar University, 4400 MLK Boulevard, P.O. Box 10046, Beaumont, Texas 77710, USA.
²⁷ Florida State University, Tallahassee, Florida 32306, USA.
²⁸ INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
²⁹ Università di Roma Tor Vergata, 00133 Rome, Italy.
³⁰ Yerevan Physics Institute, 375036 Yerevan, Armenia.
³¹ University of Connecticut, Storrs, Connecticut 06269, USA.
³² II Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany.
³³ University of South Carolina, Columbia, South Carolina 29208, USA.
³⁴ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³⁵ Christopher Newport University, Newport News, Virginia 23606, USA.
³⁶ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
³⁷ INFN, Sezione di Torino, 10125 Torino, Italy.
³⁸ Virginia Tech, Blacksburg, Virginia 24061-0435, USA.
³⁹ Kyungpook National University, Daegu 41566, Republic of Korea.
⁴⁰ University of Virginia, Charlottesville, Virginia 22901, USA.
⁴¹ Norfolk State University, Norfolk, Virginia 23504, USA.
⁴² Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
⁴³ Università degli Studi dell'Insubria, 22100 Como, Italy.
⁴⁴ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
⁴⁵ INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
⁴⁶ Catholic University of America, Washington, D.C. 20064, USA.
⁴⁷ James Madison University, Harrisonburg, Virginia 22807, USA.
⁴⁸ New Mexico State University, P.O. Box 30001, Las Cruces, New Mexico 88003, USA.
⁴⁹ Institute fur Kernphysik (Juelich), 52425 Juelich, Germany.
⁵⁰ Duke University, Durham, North Carolina 27708-0305, USA.
⁵¹ Canisius College, Buffalo, New York, USA.

PMID: 35061432
DOI: 10.1103/PhysRevLett.127.272303

Improved Λp Elastic Scattering Cross Sections between 0.9 and 2.0 GeV/c as a Main Ingredient of the Neutron Star Equation of State

J Rowley et al. Phys Rev Lett. 2021.

. 2021 Dec 31;127(27):272303.

doi: 10.1103/PhysRevLett.127.272303.

Authors

Affiliations

¹ Ohio University, Athens, Ohio 45701, USA.
² California State University, Dominguez Hills, Carson, California 90747, USA.
³ University of York, York YO10 5DD, United Kingdom.
⁴ Old Dominion University, Norfolk, Virginia 23529, USA.
⁵ Argonne National Laboratory, Argonne, Illinois 60439, USA.
⁶ Temple University, Philadelphia, Pennsylvania 19122, USA.
⁷ Florida International University, Miami, Florida 33199, USA.
⁸ INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
⁹ INFN, Sezione di Genova, 16146 Genova, Italy.
¹⁰ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
¹¹ National Research Centre Kurchatov Institute-ITEP, Moscow 117259, Russia.
¹² Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA.
¹³ INFN, Sezione di Pavia, 27100 Pavia, Italy.
¹⁴ Università degli Studi di Brescia, 25123 Brescia, Italy.
¹⁵ INFN, Sezione di Catania, 95123 Catania, Italy.
¹⁶ Universià degli Studi di Messina, 98166 Messina, Italy.
¹⁷ Fairfield University, Fairfield Connecticut 06824, USA.
¹⁸ IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
¹⁹ The George Washington University, Washington, D.C. 20052, USA.
²⁰ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
²¹ Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France.
²² Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
²³ Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
²⁴ Università di Ferrara, 44121 Ferrara, Italy.
²⁵ University of Glasgow, Glasgow G12 8QQ, United Kingdom.
²⁶ Lamar University, 4400 MLK Boulevard, P.O. Box 10046, Beaumont, Texas 77710, USA.
²⁷ Florida State University, Tallahassee, Florida 32306, USA.
²⁸ INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
²⁹ Università di Roma Tor Vergata, 00133 Rome, Italy.
³⁰ Yerevan Physics Institute, 375036 Yerevan, Armenia.
³¹ University of Connecticut, Storrs, Connecticut 06269, USA.
³² II Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany.
³³ University of South Carolina, Columbia, South Carolina 29208, USA.
³⁴ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³⁵ Christopher Newport University, Newport News, Virginia 23606, USA.
³⁶ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
³⁷ INFN, Sezione di Torino, 10125 Torino, Italy.
³⁸ Virginia Tech, Blacksburg, Virginia 24061-0435, USA.
³⁹ Kyungpook National University, Daegu 41566, Republic of Korea.
⁴⁰ University of Virginia, Charlottesville, Virginia 22901, USA.
⁴¹ Norfolk State University, Norfolk, Virginia 23504, USA.
⁴² Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
⁴³ Università degli Studi dell'Insubria, 22100 Como, Italy.
⁴⁴ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
⁴⁵ INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
⁴⁶ Catholic University of America, Washington, D.C. 20064, USA.
⁴⁷ James Madison University, Harrisonburg, Virginia 22807, USA.
⁴⁸ New Mexico State University, P.O. Box 30001, Las Cruces, New Mexico 88003, USA.
⁴⁹ Institute fur Kernphysik (Juelich), 52425 Juelich, Germany.
⁵⁰ Duke University, Durham, North Carolina 27708-0305, USA.
⁵¹ Canisius College, Buffalo, New York, USA.

PMID: 35061432
DOI: 10.1103/PhysRevLett.127.272303

Abstract

Strange matter is believed to exist in the cores of neutron stars based on simple kinematics. If this is true, then hyperon-nucleon interactions will play a significant part in the neutron star equation of state. Yet, compared to other elastic scattering processes, there is very little data on Λ-N scattering. This experiment utilized the CEBAF Large Acceptance Spectrometer (CLAS) detector to study the Λp→Λp elastic scattering cross section in the incident Λ momentum range 0.9-2.0 GeV/c. These are the first data on this reaction since the 1970s. The new cross sections have significantly better accuracy and precision than the existing world data, and the techniques developed here can also be used in future experiments.

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Improved Λp Elastic Scattering Cross Sections between 0.9 and 2.0 GeV/c as a Main Ingredient of the Neutron Star Equation of State

Affiliations

Improved Λp Elastic Scattering Cross Sections between 0.9 and 2.0 GeV/c as a Main Ingredient of the Neutron Star Equation of State

Authors

Affiliations

Abstract

LinkOut - more resources

Full Text Sources