e^+ e^- Annihilation into J/psi + J/psi
高能物理 - 唯象学
2008-11-26 v4
摘要
Recent measurements by the Belle Collaboration of the exclusive production of two charmonia in e^+ e^- annihilation differ substantially from theoretical predictions. We suggest that a significant part of the discrepancy can be explained by the process e^+ e^- -> J/psi + J/psi. Because the J/psi + J/psi production process can proceed through fragmentation of two virtual photons into two cc-bar pairs, its cross section may be larger than that for J/psi +eta_c by about a factor 1.8, in spite of a suppression factor alpha^2/alpha_s^2 that is associated with the QED and QCD coupling constants.
引用
@article{arxiv.hep-ph/0212181,
title = {e^+ e^- Annihilation into J/psi + J/psi},
author = {Geoffrey T. Bodwin and Eric Braaten and Jungil Lee},
journal= {arXiv preprint arXiv:hep-ph/0212181},
year = {2008}
}
备注
5 pages, 2 figures, 1 table, revised to correct errors in original version, Erratum to Phys. Rev. Lett. article included as a separate file