Year: 2024
Type: article
Abstract: \nObservations of flavor anomalies in the b-sector, particularly the deviations in the measurements of the lepton flavor universality ratios in the b → cτντ transitions from the standard model (SM) predictions, suggest the existence of possible new physics beyond the SM. In the pursuit of new physics in similar decays involving b → cℓνℓ transitions, we scrutinize the decay modes Λb Λc*(2595, 2625)τ−ν¯τ beyond the SM. In particular, we examine the impact of the presence of leptoquarks in these decay modes, within the framework of the vector leptoquark U1 model. We employ form factors obtained from lattice QCD (LQCD) calculations to predict various q2-dependent observables. Some of these observables include the differential branching fraction, the ratio of branching fractions and the forward-backward asymmetry of the charged lepton. The new couplings are constrained using current b → cℓνℓ experimental data.\n
Authors: C.P. Haritha, Barilang Mawlong
Institution: University of Hyderabad
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6959472354
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