26-30 July 2021
Europe/Berlin timezone

Studies of charmonium-like states at Belle II (12'+3')

29 Jul 2021, 10:45


Parallel session talk QCD and Hadronic Physics T06: QCD and Hadronic Physics


Rashmi Dhamija (IIT Hyderabad)


The 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

Collaboration / Activity Belle II
Email libby@iitm.ac.in
First author Jim Libby

Presentation Materials