Search for a narrow baryonic state decaying to pK^S₀ and\n \pK^S₀ in deep inelastic scattering with the HERA II data

2016/08/23 by R. Hori, Hori, Ryuma
Physics and Astronomy · #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1608.06486

Abstract

This paper presents the result of a search for a narrow strange baryonic\nstate in the invariant-mass distribution of pK⁰_S(\pK⁰_S) in HERA\nII data (2003-2007). The search was performed in the deep inelastic scattering\n(DIS) data with photon virtuality, Q², between 20 and 100 GeV. The analysis\nin HERA II period has improvements over the previous ZEUS analysis in HERA I\nperiod (1996-2000). These consist of large statistics and improved particle\nidentification performance by using both of the CTD dE/dx and the MVD dE/dx\nin this search. Contrary to evidence for such an exotic state around 1.52 GeV\nin the HERA I data, no such state is found in this analysis. The upper limits\non the production cross section are set at 95% confidence level.\n

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