Decays of Zb -> Upsilon + pi via triangle diagrams in heavy meson molecules
High Energy Physics - Phenomenology
2014-04-23 v1
Abstract
Bottomonium-like resonances Zb(10610) and Zb'(10650) are good candidates of hadronic molecules composed of BBbar* (or B*Bbar) and B*Bbar*, respectively. Considering Zb (Zb') as heavy meson molecules, we investigate the decays of Zb(')^+ -> Upsilon (nS) pi^+$ in terms of the heavy meson effective theory. We find that the intermediate B (B*) and Bbar (Bbar*) meson loops and the form factors play a significant role to reproduce the experimental values of the decay widths. We also predict the decay widths of Zc^+ -> J/\psi pi^+ and psi(2S) pi^+ for a charmonium-like resonance Zc which has been reported recently in experiments.
Keywords
Cite
@article{arxiv.1310.3029,
title = {Decays of Zb -> Upsilon + pi via triangle diagrams in heavy meson molecules},
author = {Shunsuke Ohkoda and Shigehiro Yasui and Atsushi Hosaka},
journal= {arXiv preprint arXiv:1310.3029},
year = {2014}
}
Comments
10 pages, 5 figures