Measurement of the \boldsymbole⁺e^-→ K⁺K^-ψ(2S) Cross Section at Center-of-Mass Energies from 4.699 to 4.951 GeV and Search for \boldsymbolZ_cs^± in the \boldsymbolZ_cs^±→ K^±ψ(2S) Decay

2024/07/29 by BESIII Collaboration, Ablikim, M., Achasov, M. N. +651
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.2407.20009

Abstract

We perform the first investigation of the process e⁺e^-→ K⁺K^-ψ(2S) and report its Born cross sections over a range of center-of-mass energies from 4.699 to 4.951~GeV. The measurements are carried out using several partial reconstruction techniques using data samples collected by the BESIII detector with a total integrated luminosity of 2.5~fb^-1. We search for new tetraquark candidates Z_cs^± in the decays Z_cs^±→ K^±ψ(2S). No significant Z_cs^± signals are observed.

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