Speaker
Description
In order to understand the nature of the XYZ particles, theoretical predictions of the various XYZ decay modes are essential. In this work, we focus on the decays of the heavy quarkonium hybrids in the EFT framework. We start with the weakly coupled potential NRQCD effective theory that describes systems with two heavy quarks and incorporates multipole expansions and use it to develop a Born-Oppenheimer effective theory (BOEFT) to describe the hybrids and compute the inclusive decay rates and semi-inclusive decay rates into traditional quarkonium. We find that our results of the decay rates are different from the previous theoretical studies and we also compare with the experimental data in PDG. We develop a systematic EFT framework in which the theoretical uncertainty can be systematically improved.
