Speaker
Francesco Giacosa
(Institute of Theoretical Physics, Jan Kochanowski University, Kielce, Poland)
Description
We study hybryd mesons in the framework of the extended Linear Sigma Model (eLSM). In particular, we consider the ground-state hybrids (with exotic quantum numbers $1^-+$, to which $\Pi_1(1600)$ belongs, other members till unknown) and their (also unknown) axial-vector chiral partners. We evaluate both masses and decays of these hybrid mesons into conventional quark-antiquark states, such as pseudoscalar and (pseudo)vector mesons. We also show that the decays of ground-state hybrids into $\eta-\pi$ and $\eta'-\pi$ can be understood by a an interaction term arising from the chiral anomaly.
Primary author
Francesco Giacosa
(Institute of Theoretical Physics, Jan Kochanowski University, Kielce, Poland)
