Vector Leptoquark Mediated Leptonic Decay of the Charged $B$-Meson
High Energy Physics - Phenomenology
2026-01-27 v2
Abstract
We study the purely leptonic decay of the charged -meson within the Vector Leptoquark model at both leading-order and with one-loop QCD corrections. The structure of this amplitude is characterised by direct quark-lepton couplings which allow for lepton flavour universality violation (LFUV) and additional loop-level topologies. The leptoquark channel contributions to the -meson decay constant are computed and accommodated in its lattice-improved uncertainty bounds by constraining the parameter space of this model in two distinct new-physics scenarios. Under these constraints, we provide predictions for both the LFUV and non-LFUV contributions to the branching fractions of this decay.
Keywords
Cite
@article{arxiv.2511.06992,
title = {Vector Leptoquark Mediated Leptonic Decay of the Charged $B$-Meson},
author = {M. Omar Nadeem and Arslan Sikandar},
journal= {arXiv preprint arXiv:2511.06992},
year = {2026}
}