Observation of Doublecc¯Production ine+e−Annihilation ats≈10.6 GeV

2002/05/31 by The Belle Collaboration, K. Abe, R. Abe +95 · 16 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.89.142001

published as Phys.Rev.Lett.89:142001,2002 · 7 pages, 2 figures, to be submitted to Physical Review Letters

arxiv created 2002/05/31 · openalex publication_date 2002/09/16 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

We report the observation of prompt J/\ensuremathψ via double cc production from the e⁺e^\ensuremath- continuum. In this process one cc pair fragments into a J/\ensuremathψ meson while the remaining pair either produces a charmonium state or fragments into open charm. Both cases have been experimentally observed. We find cross sections of \ensuremathσ[e⁺e^\ensuremath-\ensuremath→J/\ensuremathψ\ensuremathη_c(\ensuremathγ)]\ifmmode×\else\texttimes\fiB(\ensuremathη_c\ensuremath→\ensuremath≥4 charged)=(0.033_\ensuremath-0.006^+0.007\ifmmode±\else\textpm\fi0.009) pb and \ensuremathσ(e⁺e^\ensuremath-\ensuremath→J/\ensuremathψD^*+X)=(0.53_\ensuremath-0.15^+0.19\ifmmode±\else\textpm\fi0.14) pb and infer \ensuremathσ(e⁺e^\ensuremath-\ensuremath→J/\ensuremathψcc)/\ensuremathσ(e⁺e^\ensuremath-\ensuremath→J/\ensuremathψX)=0.59_\ensuremath-0.13^+0.15\ifmmode±\else\textpm\fi0.12. These results are obtained from a 46.2 fb^\ensuremath-1 data sample collected near the \ensuremathΥ(4S) resonance, with the Belle detector at the KEKB collider.

Citations

• Production of Prompt Charmonia ine+e−Annihilation ats≈10.6GeV

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