Long distance contributions to the eta_b => Jpsi Jpsi decay
High Energy Physics - Phenomenology
2008-11-26 v2 High Energy Physics - Experiment
Abstract
It was argued long ago that eta_b could be observed through the eta_b => Jpsi(=> mu+ mu-) Jpsi(=> mu+ mu-) decay chain. Recent calculations indicate that the width of eta_b into two Jpsi is almost 3 orders of magnitude smaller than the one into the D bar D*. We study the effects of final-state interactions due to the D bar D* intermediate state on the Jpsi Jpsi final state. We find that the inclusion of this contribution may enhance the short-distance branching ratio up to about 2 orders of magnitude.
Keywords
Cite
@article{arxiv.hep-ph/0703232,
title = {Long distance contributions to the eta_b => Jpsi Jpsi decay},
author = {Pietro Santorelli},
journal= {arXiv preprint arXiv:hep-ph/0703232},
year = {2008}
}
Comments
4 pages, 3 figures. The estimate of the dispersive contribution was added. Typos corrected. To be published in Phys. Rev. D