Siam Physics Congress 2021

Study of Electroweak Penguin B Decays at Belle II Experiment

Not scheduled

15m

Faculty of Science, Prince of Songkla University

Oral High Energy and Particle Physics

Speaker

Mr Jittapan Ineead (Chulalongkorn University)

Description

The $b\to sll$ ($l=e,\mu$) transition is a flavour-changing neutral current process that mediates through one-loop penguin or box diagrams. The decay is considered to be a good probe for the New Physics as particles predicted in the beyond Standard Model theories can enter into the loop. The exclusive decay $B\to K^{(\ast )}{l}^{+}{l}^{-}$ was first observed by the Belle experiment, and it provides many observables such as the branching fraction, $CP$ asymmetry and forward-backward asymmetry and other angular observables. Recently, the LHCb experiment has reported some clue of a lepton universality violation from the branching fraction ratio of the $B\to K{\mu }^{+}{\mu }^{-}$ and $B\to K{e}^{+}{e}^{-}$ decays. In this presentation, we report the status of the analysis of the $B\to K{l}^{+}{l}^{-}$ decay at the Belle II experiment which started the data taking in 2019. We also present an activity at the Belle II Chulalongkorn University group where we study the $B\to KJ/\psi$ decay that has the same topology as the $B\to K{l}^{+}{l}^{-}$.

Presentation materials

Abstract for SPC2021 (J. Ineead et al.)_final.pdf

Peer reviewing

Paper

Accepted on 2 Sept 2021 by Boonyarit Chatthong

JPCS for SPC2021 (J. Ineead et al.)_submitted4.pdf