arXiv:1905.07916·v1·High Energy Physics — Experiment

XYZ at Belle

Jens Sören Lange (on behalf of the Belle Collaboration)🇩🇪

Abstract

Recent results of exotic states with heavy quarks, denoted as $X Y Z$ states, are presented. The results include searches for the $Y$ (4260) in $B$ meson decays, a spin partner of $Y$ (4630), and the strange Pentaquark $P_{s}^{+}$ . In addition, the measurements of the absolute branching fraction of $X$ (3872) and search for double $Z_{c}$ production is discussed.

Comments: Proceedings of PHIPSI19, International Workshop on e+e- collisions from Phi to Psi, Novosibirsk, Russia, 25.02.-01.03.2019