Anomalies in Weak Decays of Hadrons Containing a b Quark

TL;DR

This paper reviews observed deviations in semileptonic B and Bc meson decays from Standard Model predictions, analyzing potential new physics effects via four-fermion operators and calculating relevant form factors.

Contribution

It introduces a theoretical analysis incorporating new four-fermion operators and computes form factors using a covariant quark model, extending current decay models.

Findings

Identifies deviations in experimental data from SM predictions.

Analyzes potential new physics contributions to decay processes.

Provides calculated form factors within the covariant quark model.

Abstract

A brief review of the current state of observed deviations of theoretical predictions from experimental data in semileptonic decays of $B$ and $B_c$ mesons is given. A theoretical analysis of these decays is carried out, taking into account the effects of new physics, which appear due to the introduction of new four-fermion operators, which are absent in the basis of the Standard Model (SM) operators. The necessary form factors are calculated within the framework of the covariant quark model developed in our papers.