[Submitted on 23 Jun 2016] (cross-list from hep-ph)
Understanding close-lying exotic charmonia states within QCD sum rules
A. Martínez Torres🇧🇷 · K. P. Khemchandani🇧🇷 · J. M. Dias🇧🇷 · F. S. Navarra🇧🇷 · M. Nielsen🇧🇷
Motivated by the experimental findings of some new exotic states decaying into channels like , we investigate the formation of resonances/bound states in the system using QCD sum rules. To do this we start with a current of the type vector times vector and use spin projectors to separate the spin 0, 1 and 2 contributions to the correlation function. We find three states with isospin 0, nearly spin degenerate, with a mass around 4.1 GeV. We have also investigated the decay of these states to and provide the corresponding partial widths. Such information should be useful for experimental studies in future.
- Comments:
- New calculations included on the widths of the states, published version
- Subjects:
- High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
- arXiv:
- 1606.07505 [pdf]