Measurements of Ξ ^- and Ξ ⁺ production in proton–proton interactions at √s_NN = 17.3 GeV in the NA61/SHINE experiment

2020/01/01 by NA SHINE Collaboration, SHINE Collaboration, A. Aduszkiewicz +235
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · doi:10.48550/arxiv.2006.02062

openalex publication_date 2020/01/01 · openalex created_date 2020/06/12 · openalex updated_date 2026/08/01

Abstract

The production of Ξ(1321)^- and Ξ(1321)⁺ hyperons in inelastic p+p interactions is studied in a fixed target experiment at a beam momentum of 158 GeV/textitc. Double differential distributions in rapidity y and transverse momentum p_T are obtained from a sample of 33M inelastic events. They allow to extrapolate the spectra to full phase space and to determine the mean multiplicity of both Ξ^- and Ξ⁺. The rapidity and transverse momentum spectra are compared to transport model predictions. The Ξ^- mean multiplicity in inelastic p+p interactions at 158~\GeVc is used to quantify the strangeness enhancement in A+A collisions at the same centre-of-mass energy per nucleon pair.

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