SMuK 2021 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 19: Hadron Structure and Spectroscopy IV
HK 19.1: Gruppenbericht
Mittwoch, 1. September 2021, 16:30–17:00, H3
Search for resonant states with c c s s quark content at BaBar and Belle — •Elisabetta Prencipe1, Dmytro Meleshko1, Ashish Thampi2, Soeren Lange1, and James Ritman2 — 1JLU - University of Giessen — 2Forschungszentrum Juelich
The study of exotics with charm- and strange- quark content has recently gained a lot of attention. In fact, the LHCb collaboration has already published on this topic three papers. In the latest submission, LHCb has shown interesting results by analyzing the invariant mass of the J/ψ φ and J/ψ K systems in B decays. Former studies were conducted by the CDF, D0, CMS and BaBar collaborations, with controversial interpretation regarding possible resonant states in the J/ψ φ invariant mass. All previous studies were performed by analyzing B meson decays only, e.g. B → J/ψ φ K. We recently started this study with the whole Belle data set collected at the energy in the center of mass of Υ(4S). We decide to perform the analysis to look for c c s s exotics at B factories, and combine data sets of 2 experiments (BaBar and Belle) to cure problems of insufficient statistics. We perform our study not only through B decays (charged and neutral B modes), but also in the continuum. This offers the possibility to cross-check the presence of such resonant states -if any- in different decay modes and different production mechanisms. The state of the art of the analysis of B → J/ψ φ K, e+e− → J/ψ φ X and e+ e− → Ds− Ds(2317)+ X is here presented. A DFG project has been submitted and approved on this topic for 3 years.