2015/11/09 by A. Guskov, Alexey Guskov, Guskov, Alexey
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.1511.02832
EPS-HEP-2015 proceedings
arxiv created 2015/11/09 · openalex publication_date 2015/11/09 · arxiv updated 2015/11/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Zc(3900) hadron state has been found by the BES-III and Belle experiments in the decay of the hadron state with higher mass. The first attempt to search for the direct exclusive production of the Zc±(3900) hadron by virtual photons has been performed in the reaction μ+ N → μ+ N' Zc(3900)± → μ+ N' J/ψπ± at COMPASS \citeAdolph:2014hba. The data cover the range from 7~GeV to 19~GeV in the centre-of-mass energy of the photon-nucleon system. The full COMPASS data set collected with a muon beam between 2002 and 2011 has been used. An upper limit for the ratio BR(Zc±(3900)→ J/ψπ± )× (σ γ~N → Zc±(3900)~ N /σ γ~N → J/ψ~ N) of 3.7×10-3 has been established at the confidence level of 90%.