QCD calculation of J/psi+gamma mass distributions
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
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.
Keywords
Cite
@article{arxiv.hep-ph/9308261,
title = {QCD calculation of J/psi+gamma mass distributions},
author = {E. L. Berger and K. Sridhar},
journal= {arXiv preprint arXiv:hep-ph/9308261},
year = {2008}
}
Comments
7 pages LaTex, 4 figures available on request. CERN-TH.6974/93, ANL-HEP-PR-93.64