Observation of narrow baryon resonance in pK⁰_s mode in pA-interactions at 70 GeV/c with SVD-2 setup

2005/10/03 by A. Kubarovsky, V. Popov, Kubarovsky, A. +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0510006

4 pages, 4 figures, First International Workshop "Hadron Structure and QCD", HSQCD-2004, Repino, St. Petersburg, Russia, May 2004

arxiv created 2005/10/03 · openalex publication_date 2005/10/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report on the SVD-2 experiment data analysis aimed to search for an exotic baryon state, the Θ⁺-baryon, in a pK⁰_s decay mode with IHEP U-70 accelerator proton beam at 70 GeV/c. A resonant structure with M=1526±3(stat.)± 3(syst.)~MeV/c² and Γ< 24 MeV/c² was found in the pK⁰_s invariant mass spectrum, with the statistical significance of this peak estimated as 5.6~σ.

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