Regular Article - Theoretical Physics
Investigation on the New Physics effects of the vector leptoquark on semileptonic decays
School of Physics and Electrical Engineering, Anyang Normal University, 455000, Anyang, Henan, China
Accepted: 7 June 2021
Published online: 20 June 2021
In recent years, the experimental results about the ratio of the branching ratios and , which are in the semileptonic and decays, have been observed to deviate from the Standard Model prediction by , , and respectively. Motivated by these anomalies and by the abundant data samples, we investigate possible New Physics effects of the vector leptoquark in the semileptonic decay (). which is induced by at the quark level. Using the best fit solutions for the new operator Wilson coefficients and the relevant form factors which are obtained in the light-front quark model, we find that (i) the contributions of the vector leptoquark to and to be significant; (ii) the two best fit solutions in the vector leptoquark are indistinguishable from each other and give similar amounts of enhancements to these two observables; (iii) both two cases of the vector leptoquark give nearly same results as those of the Standard Model for , and . We hope that the numerical results in this work will be tested in the future high energy experiments.
© The Author(s) 2021
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