High Energy Physics Seminars

Measurement of CP-violating parameters in the 𝐁𝐬𝟎→𝐉/𝛙𝛟 decay using proton-proton collisions in the CMS experiment at √𝐬=𝟏𝟑 𝐓𝐞𝐕

by Dr. Muhammad Alibordi (Dept. of Physics and Astronomy, Mississippi State University, USA)

Friday, November 25, 2022 from to (Asia/Kolkata)
at Zoom link: https://cern.zoom.us/j/95212002203?pwd=VmYzQjhpWWpQVHdSUzliVnRjZlVaQT09
This talk will describe the measurement of CP violating parameters in the decay process of BsO→J/ψ(→μ+μ)ϕ(→K+K). The study is based on proton-proton collision data collected during 2017–2018 by the CMS experiment at √s=13 TeV, corresponding to an integrated luminosity of 96.4 fb−1. The angular analysis of the decay process mainly focuses on the measurement of the weak phase ϕs; it also extracts the oscillation frequency (Δms), the difference in the decay width between the Bs mass eigenstates (ΔΓs), and the direct CP-violating parameter (λ). The results of the measurement at 13 TeV are combined with those at 8 TeV leading to significant improvements.