Processing math: 100%
SciPost logo

SciPost Submission Page

Delving into new physics in semileptonic bcτˉν transitions

by Aishwarya Bhatta, Rukmani Mohanta

Submission summary

Authors (as registered SciPost users): Aishwarya Bhatta
Submission information
Preprint Link: scipost_202202_00039v2  (pdf)
Date accepted: 2025-03-06
Date submitted: 2025-02-11 19:13
Submitted by: Bhatta, Aishwarya
Submitted to: SciPost Physics Proceedings
Proceedings issue: 16th International Workshop on Tau Lepton Physics (TAU2021)
Ontological classification
Academic field: Physics
Specialties:
  • High-Energy Physics - Theory
  • High-Energy Physics - Phenomenology
Approaches: Theoretical, Phenomenological

Abstract

Recently, several indications of lepton non-universality observables have been perceived in semileptonic B meson decay processes, both in the neutral-current (bsll) and charged-current (bclˉνl) transitions. Influenced by these fascinating quotients, we examine the semileptonic decays involving the bclˉνl quark level transitions. We execute it through a model independent analysis in order to probe the nature of new physics. Taking into consideration the most general effective Hamiltonian, we scrutinize ΛbΛcτˉντ, B+cηcτ+ντ, and BDτˉντ (where D={D0,D1,D1,D2} are the four lightest excited charm mesons) processes, in the presence of new physics. We perform a global fit to different sets of new coefficients, making use of the measurements on RD, RD, RJ/ψ, PDτ and the upper limit on Br(B+cτ+ντ). We then inspect the effect of constrained new couplings on the branching ratios, forward-backward asymmetry parameters, lepton non-universality ratios (LNU), lepton and hadron polarization asymmetries of these decay modes.

Current status:
Accepted in target Journal

Editorial decision: For Journal SciPost Physics Proceedings: Publish
(status: Editorial decision fixed and (if required) accepted by authors)

Login to report or comment