Hunting for glueballs in electron-positron annihilation
Abstract
We calculate the cross section for the exclusive production of J^{PC}=0^{++} glueballs G_0 in association with the J/psi in e^+e^- annihilation using the pQCD factorization formalism. The required long-distance matrix element for the glueball is bounded by CUSB data from a search for resonances in radiative Upsilon decay. The cross section for e^+e^- -> J/psi+ G_0 at sqrt{s}=10.6 GeV is similar to exclusive charmonium-pair production e^+e^- -> J/psi+h for h=eta_c and chi_{c0}, and is larger by a factor 2 than that for h=eta_{c}(2S). As the subprocesses gamma^* -> (c c-bar) (c c-bar) and gamma^* -> (c c-bar) (g g) are of the same nominal order in perturbative QCD, it is possible that some portion of the anomalously large signal observed by Belle in e^+ e^- -> J/psi X may actually be due to the production of charmonium-glueball J/psi G_J pairs.
Cite
@article{arxiv.hep-ph/0305269,
title = {Hunting for glueballs in electron-positron annihilation},
author = {Stanley J. Brodsky and Alfred Scharff Goldhaber and Jungil Lee},
journal= {arXiv preprint arXiv:hep-ph/0305269},
year = {2009}
}
Comments
4 pages, 1 figure, version published in Phys. Rev. Lett