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Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Hadron Structure and Spectroscopy V

HK 31.1: Group Report

Tuesday, March 29, 2022, 16:00–16:30, HK-H8

Study of resonant states with c c s s quark content with BaBar and Belle combined data sets — •Elisabetta Prencipe1, Dmytro Meleshko1, Jens Soeren Lange1, Ihor Melnyk2, James Ritman3, and Ashish Thampi31JLU-Giessen, Giessen, Germany — 2TSNU-Kyiv, Kyiv, Ukraine — 3FZJ, Juelich, Germany

The B factories Belle and BaBar have collected huge data sets at the energy in the center of mass of the Υ(nS), n = 1,2,3,4, Belle even at that of the Υ(5S), integrating roughly 1.5 ab−1 data. This offers unique opportunities to perform spectroscopy studies e.g. in radiative decays or ISR analyses. Waiting that the new Belle II experiment will collect the whole planned data sets, 50 ab−1, we have now the opportunity to perform the analysis of invariant mass systems with c c s s quark content.

A study of resonances with double cs quark content has been conducted with combined BaBar and Belle data sets. We present the results obtained by analyzing the invariant mass systems of J/ψ φ and Ds+ DsJ(*)− in different production mechanisms: B decays, Bs decays (Belle) and in the continuum. Interesting results are obtained, some of them confirming the LHCb observations in the J/ψ φ invariant mass though B decays. Results obtained in the neutral B channel, Bs and in the continuum are original measurements. This program has been approved by DFG as the first spectroscopy analysis with combined data sets from B factories.

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