Study of χ_bJ(1P) Properties in the Radiative Υ(2S) Decays

2016/06/03 by A. Abdesselam, Abdesselam, A., I. Adachi +544
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

paper · pdf · doi:10.48550/arxiv.1606.01276

openalex publication_date 2016/06/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report a study of radiative decays of χ_bJ(1P)(J=0,1,2) mesons into 74 hadronic final states comprising charged and neutral pions, kaons, protons; out of these, 41 modes are observed with at least 5 standard deviation significance. Our measurements not only improve the previous measurements by the CLEO Collaboration but also lead to first observations in many new modes. The large sample allows us to probe the total decay width of the χ_b0(1P). In the absence of a statistically significant result, a 90% confidence-level upper limit is set on the width at Γ_total< 2.4 MeV. Our results are based on 24.7 fb^-1 of e+e- collision data recorded by the Belle detector at the Υ(2S) resonance, corresponding to (157.8±3.6)×10⁶ Υ(2S) decays.

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