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

(CLAS Collaboration)

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

(CLAS Collaboration)

Ohio University
California State University Dominguez Hills
University of York
Old Dominion University
Argonne National Laboratory
Temple University
Florida International University
National Institute for Nuclear Physics
Thomas Jefferson National Accelerator Facility
Russian Research Centre Kurchatov Institute
Duquesne University
University of Brescia
Universià degli Studi di Messina
Fairfield University
Université Paris-Saclay
George Washington University
Universidad Técnica Federico Santa Maria
Lomonosov Moscow State University
Mississippi State University
University of Ferrara
University of Glasgow
Lamar University
Florida State University
University of Rome Tor Vergata
A. Alikhanian Yerevan Institute of Physics
University of Connecticut
Justus Liebig University Giessen
University of South Carolina
University of New Hampshire

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

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.

Original language	English
Article number	272303
Journal	Physical Review Letters
Volume	127
Issue number	27
DOIs	https://doi.org/10.1103/PhysRevLett.127.272303
State	Published - 31 Dec 2021

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10.1103/PhysRevLett.127.272303

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@article{b82737835c4c4249a1148047b5d820b2,

title = "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",

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.",

author = "\{(CLAS Collaboration)\} and J. Rowley and N. Compton and C. Djalali and K. Hicks and J. Price and N. Zachariou and Adhikari, \{K. P.\} and Armstrong, \{W. R.\} and H. Atac and L. Baashen and L. Barion and M. Bashkanov and M. Battaglieri and I. Bedlinskiy and F. Benmokhtar and A. Bianconi and L. Biondo and Biselli, \{A. S.\} and M. Bondi and F. Boss{\`u} and S. Boiarinov and Briscoe, \{W. J.\} and Brooks, \{W. K.\} and D. Bulumulla and Burkert, \{V. D.\} and Carman, \{D. S.\} and Carvajal, \{J. C.\} and A. Celentano and P. Chatagnon and V. Chesnokov and T. Chetry and G. Ciullo and L. Clark and Cole, \{P. L.\} and M. Contalbrigo and G. Costantini and V. Crede and A. D'Angelo and N. Dashyan and \{De Vita\}, R. and M. Defurne and A. Deur and S. Diehl and R. Dupr{\'e} and H. Egiyan and M. Ehrhart and \{El Alaoui\}, A. and \{El Fassi\}, L. and P. Eugenio and Jo, \{H. S.\}",

note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",

year = "2021",

month = dec,

day = "31",

doi = "10.1103/PhysRevLett.127.272303",

language = "English",

volume = "127",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "27",

}

TY - JOUR

T1 - 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

AU - (CLAS Collaboration)

AU - Rowley, J.

AU - Compton, N.

AU - Djalali, C.

AU - Hicks, K.

AU - Price, J.

AU - Zachariou, N.

AU - Adhikari, K. P.

AU - Armstrong, W. R.

AU - Atac, H.

AU - Baashen, L.

AU - Barion, L.

AU - Bashkanov, M.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Benmokhtar, F.

AU - Bianconi, A.

AU - Biondo, L.

AU - Biselli, A. S.

AU - Bondi, M.

AU - Bossù, F.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bulumulla, D.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Carvajal, J. C.

AU - Celentano, A.

AU - Chatagnon, P.

AU - Chesnokov, V.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clark, L.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Costantini, G.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - Defurne, M.

AU - Deur, A.

AU - Diehl, S.

AU - Dupré, R.

AU - Egiyan, H.

AU - Ehrhart, M.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Jo, H. S.

PY - 2021/12/31

Y1 - 2021/12/31

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85122493659

U2 - 10.1103/PhysRevLett.127.272303

DO - 10.1103/PhysRevLett.127.272303

M3 - Article

C2 - 35061432

AN - SCOPUS:85122493659

SN - 0031-9007

VL - 127

JO - Physical Review Letters

JF - Physical Review Letters

IS - 27

M1 - 272303

ER -

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

Abstract

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