Affordable Access

deepdyve-link
Publisher Website

Two-photon width of eta_c and eta'_c from Heavy-Quark Spin Symmetry

Authors
  • Lansberg, J. P.
  • Pham, T. N.
Type
Published Article
Publication Date
Jul 13, 2006
Submission Date
Mar 15, 2006
Identifiers
DOI: 10.1103/PhysRevD.74.034001
Source
arXiv
License
Unknown
External links

Abstract

We evaluate the two-photon width of the pseudoscalar charmonia, Gamma(eta_c -> gamma gamma) and Gamma(eta'_c -> gamma gamma), within a Heavy-Quark Spin-Symmetry setting and show that whereas the former agrees with experiment, the latter is more than twice larger than the recent measurement by CLEO. When binding-energy effects are included in the eta'_c case, the discrepancy is worse, pointing out at a possible anomaly in the eta'_c decay.

Report this publication

Statistics

Seen <100 times