2006/12/31 by M. Ablikim, J. Z. Bai, Y. Ban +97 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevlett.99.011802
published as Phys.Rev.Lett.99:011802,2007 · 5 pages, 4 figures
arxiv created 2007/07/05 · openalex publication_date 2007/07/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Using 14\ifmmode×\else\texttimes\fi106 \ensuremathψ(2S) events accumulated at the BESII detector, we report first measurements of branching fractions or upper limits for \ensuremathψ(2S) decays into \ensuremathγpp, \ensuremathγ2(\ensuremathπ+\ensuremathπ^\ensuremath-), \ensuremathγKS0K+\ensuremathπ^\ensuremath-+c.c., \ensuremathγK+K^\ensuremath-\ensuremathπ+\ensuremathπ^\ensuremath-, \ensuremathγK*0K^\ensuremath-\ensuremathπ++c.c., \ensuremathγK*0K*0, \ensuremathγ\ensuremathπ+\ensuremathπ^\ensuremath-pp, \ensuremathγ2(K+K^\ensuremath-), \ensuremathγ3(\ensuremathπ+\ensuremathπ^\ensuremath-), and \ensuremathγ2(\ensuremathπ+\ensuremathπ^\ensuremath-)K+K^\ensuremath- with the invariant mass of hadrons below 2.9 GeV/c2. We also report branching fractions of \ensuremathψ(2S) decays into 2(\ensuremathπ+\ensuremathπ^\ensuremath-)\ensuremathπ0, \ensuremathω\ensuremathπ+\ensuremathπ^\ensuremath-, \ensuremathωf2(1270), b1^\ifmmode±\else\textpm\fi\ensuremathπ^\ensuremath∓, and \ensuremathπ02(\ensuremathπ+\ensuremathπ^\ensuremath-)K+K^\ensuremath-.