000002585 001__ 2585
000002585 005__ 20210730153943.0
000002585 037__ $$aBELLE2-TALK-CONF-2021-080
000002585 041__ $$aeng
000002585 088__ $$aBELLE2-TALK-DRAFT-2021-091
000002585 100__ $$aRashmi Dhamija
000002585 245__ $$aStudies of charmonium-like states at Belle II
000002585 260__ $$aEPS-HEP 2021$$c2021-07-26
000002585 300__ $$amult. p
000002585 520__ $$aThe Belle II experiment has accumulated data corresponding to 89.99 fb-1 integrated luminosity in the past 2 years, and is performing very good. Waiting that the full planned data set will be recorded (50 ab-1), which will allow search for rare processes and will have a tremendous impact in the spectroscopy field, the Phase 3 data set allows to already perform analysis with high precision. We present here the analysis of B -> K J/psi pi pi and B -> K psi(2S): in the former for the first time the evidence for the X(3872) --->Jpsi pi pi has been found at Belle II, which is consistent with the observation at Belle of the same resonant state, performed in 2003.The re-discovery of the X(3872) based on the early Phase3 data includes the efficiency and resolution study, calibration with B -> K psi(2S), and background check. When higher statistics will be available, Belle II is planning the even more interesting analysis of B--->DDK, and search for X(3872)→DD
000002585 8560_ $$fdjaffe@bnl.gov
000002585 8564_ $$uhttps://docs.belle2.org/record/2585/files/BELLE2-TALK-CONF-2021-080.pdf