English

psi(2S) Radiative Decay Measurements

High Energy Physics - Experiment 2008-03-27 v2

Abstract

Using a sample of 14 million \psip\psip events collected with the BESII detector, branching fractions or upper limits on the branching fractions of \psip\psip decays into γ\ppb\gamma\ppb, γ2(\pip\pim)\gamma 2(\pip\pim), γ\kskp\gamma \kskp, γ\kap\kam\pip\pim\gamma \kap\kam\pip\pim, γ\kstarz\kam\pip+c.c.\gamma\kstarz\kam\pip+c.c., γ\kstarz\kstarzb\gamma \kstarz \kstarzb, γ\pip\pim\ppb\gamma\pip\pim\ppb, γ2(\kap\kam)\gamma2(\kap\kam), γ3(\pip\pim)\gamma3(\pip\pim) and γ2(\pip\pim)\kap\kam\gamma2(\pip\pim)\kap\kam with hadron invariant mass less than 2.9\gev/c2\gev/c^2 are reported. We also report branching fractions of \psip\psip decays into γ\ppb\piz\gamma\ppb\piz, \ppb\piz\piz\ppb\piz\piz, 2(\pip\pim)\piz2(\pip\pim)\piz, ω\pp\omega\pp, ωf2(1270)\omega f_2(1270), b1±πb_1^\pm\pi^\mp, \piz\kskp\piz\kskp, K±ρ\ksK^\pm\rho^\mp\ks, \piz2(\pip\pim)\kap\kam\piz2(\pip\pim)\kap\kam and γ\piz2(\pip\pim)\kap\kam\gamma\piz2(\pip\pim)\kap\kam.

Keywords

Cite

@article{arxiv.0803.2928,
  title  = {psi(2S) Radiative Decay Measurements},
  author = {BES Collaboration and M. Ablikim},
  journal= {arXiv preprint arXiv:0803.2928},
  year   = {2008}
}

Comments

14 pages, 20 figures, one number error is corrected

R2 v1 2026-06-21T10:23:00.546Z