QCD calculation of J/psi+gamma mass distributions
Abstract
Description
We compute the J/psi+gamma invariant-mass distributions from the QCD subprocess g + g --> J/psi+gamma. At large masses, this subprocess is the dominant mechanism for J/psi+gamma production, and data could provide a good test of QCD. The mass distribution peaks at relatively small masses (3.4 - 4.0 GeV) and the subprocess could, therefore, represent a significant QCD background to J/psi+gamma decay of heavier charmonia. We also analyze the J/psi angular distribution in the J/psi+gamma rest frame.
7 pages LaTex, 4 figures available on request. CERN-TH.6974/93, ANL-HEP-PR-93.64
7 pages LaTex, 4 figures available on request. CERN-TH.6974/93, ANL-HEP-PR-93.64