Sep 25 – 30, 2023
Protea Hotel King George
Africa/Johannesburg timezone

A Light shed on Lepton Flavor Universality in B meson decays

Sep 25, 2023, 4:15 PM
Regency Room (Protea Hotel King George)

Regency Room

Protea Hotel King George

Contributed Oral Presentation Physics Research Parallel Session 1


Dr Sonali Patnaik (OUAT Bhubaneshwar)


In view of the recent measurements of anomalies in semileptonic B meson decays at LHCb and several collider experiments hinting at the possible violation of lepton flavor universality, we will present a concise review of theoretical foundations of the tree- and loop-level b decays (𝑏 → 𝑐𝑙, 𝜈𝑙) and (𝑏 → 𝑠𝑙+𝑙−) along with the updated experimental background. We study the 𝑞2-dependence of form factors for the semileptonic decays and then present the world averages in the updated environment for 𝑅𝐷(𝐷∗), 𝑅𝐾(𝐾∗), 𝑅𝐽 ∕𝜓 and 𝑅𝜂𝑐 , in a model dependent (based on Relativistic independent quark model as well as independent approach. We further provide predictions of other anomalies linked with LFU such as, anomalous magnetic moment of electron and muon by Fermilab (𝑎𝜇, 𝑎𝑒), mass of W boson by CDF collaboration, the CKM puzzle (𝑅(𝑉𝑢𝑠)) in view of future high-statistics data, are also discussed. We then look over to the combined explanation of flavour anomalies (𝑅𝐷(𝐷∗), 𝑅𝐾 ), in the language of effective field theory. As flavor anomalies are the strongest hints for physics beyond standard model, therefore, the confirmation of these measurements would soon turn out to be a remarkable evidence, unravelling the New Physics in the flavour fraternity giving a better understanding on the subject for future experimentalists and theorists.

Abstract Category Particle Physics

Primary authors

Dr Rajeev Singh (Center for Nuclear Theory, Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA) Dr Sonali Patnaik (OUAT Bhubaneshwar)

Presentation materials