Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 49: Flavour physics 2

T 49.2: Talk

Tuesday, March 5, 2024, 16:15–16:30, Geb. 30.41: HS 4

Search for exotic states with ccsc content at Belle — •Dmytro Meleshko, Elisabetta Prencipe, and Soeren Lange — Justus-Liebig-Universität, Gießen.

We present results for an analysis of e⁺e⁻ → 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 ccsc quark content. As the D_s0 and D_s1 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).

Keywords: ccbarssbar; charm