Regular Article - Theoretical Physics
Probing new physics in semileptonic decays
Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang, 471023, China
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Accepted: 6 October 2019
Published online: 21 October 2019
Recently, several observed anomalies in semileptonic B meson decays have implied hints of lepton flavor universal violation. Motivated by these inspiring results, we study the baryon decays which are mediated by transitions at quark level in the Standard Model and different New Physics scenarios. In the framework of the extended Standard Model on assuming a general effective theory, we constrain the Wilson coefficients of the NP operators using the experimental measurement results for the , , , and anomalies and investigate their New Physics effects on several observables relative to the decays. We mention the differential branching fraction , the ratio of branching fractions , the lepton-side forward–backward asymmetry , the longitudinal polarization of the daughter baryons and of the lepton, and the convexity parameter .
© The Author(s), 2019