12–16 Dec 2022
IISER Mohali
Asia/Kolkata timezone

Measurement of CP-violating phase φ_s in the B0_s → J/ψφ → μ+μ−K+K− channel in pp collisions at √s = 13 TeV

12 Dec 2022, 16:00
15m
LH4 (IISER Mohali)

LH4

IISER Mohali

Lecture Hall Complex, IISER Mohali, Sector 81, Knowledge city, SAS Nagar, Punjab, India

Speaker

Samadhan Kamble (Indian Institute of Technology Madras (IN))

Description

The measurement of CP violating weak phase $\phi_s$ is achieved using the data collected by the CMS experiment at $\sqrt{s}=13$ TeV in the sample of 48500 reconstructed $B^0_s\rightarrow J/\psi \phi \rightarrow \mu^+\mu^-K^+K^-$ events corresponding to an integrated luminosity of 96.4fb$^{-1}$. The parameters are extracted by performing a time-dependent and flavor-tagged angular analysis of the $\mu^+\mu^-K^+K^-$ final state.
This talk will discuss these recent results and their combination with the previous CMS measurement at $\sqrt{s}=8$ TeV, with particular emphasis on the adopted methodology and employed novel opposite-side muon flavor tagger based on ML techniques.

Session Quark and Lepton Flavour Physics

Primary author

Samadhan Kamble (Indian Institute of Technology Madras (IN))

Presentation materials