Dmytro Meleshko ; Elisabetta Prencipe ; Sören Lange

05 March 2024
DPG-Frühjahrstagung 2024

Abstract: We present results for an analysis of $e^+e^− to D_s^+D_{sJ}^− A$ + c.c. processes in the continuum ($A$ = anything else) using the whole Belle dataset (980.1 fb$^{−1}$). The goal of the analysis is the study of $D_s^+ D_{s0}^*(2317)^− and D_s^+ D_{s1}(2460)^−$ invariant mass systems to search for possible exotic, resonant states with $c\bar{c}s\bar{s}$ quark content. As the Ds0 and Ds1 are often considered themselves as 4-quark candidates, the combined states may contain admixtures of a 6-quark state in the wave function. In addition, precise mass resolution and mass splitting measurements are presented as a test of the chiral perturbation theory. This research is supported by BMBF (05H21RGKB1) and Horizon2020 European Union Marie Slodowska Curie Action in the RISE program (n.822070).