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 languageEnglish
Article number272303
JournalPhysical Review Letters
Volume127
Issue number27
DOIs
StatePublished - 31 Dec 2021
Externally publishedYes

Funding

FundersFunder number
National Research Foundation of Korea
Scottish Universities Physics Alliance
National Science Foundation
United Kingdom Science and Technology Facilities Council
French Commissariat á l’Energie Atomique
Centre National de la Recherche Scientifique
Istituto Nazionale di Fisica Nucleare
Science and Technology Facilities CouncilST/V00106X/1
Thomas Jefferson National Accelerator Facility for the United States Department of EnergyDE-AC05-06OR23177
Comisión Nacional de Investigación Científica y TecnológicaACT1413

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