https://doi.org/10.1140/epjc/s10052-019-6648-0
Regular Article - Theoretical Physics
New physics effects of the vector leptoquark on 
decays
1
Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang, 471000, China
2
Department of Physics, Shangqiu Normal University, Shangqiu, 476000, China
* e-mail: zhangjiao198746@163.com
Received:
27
September
2018
Accepted:
4
February
2019
Published online:
22
February
2019
Motivated by the 
anomalies which may imply hints of New Physics in the flavor sector and which can be explained by adding a single vector leptoquark 
to the Standard Model as well as by the abundant 
data samples at high-luminosity collider experiments in the future, we further probe the New Physics effects of the vector leptoquark in the semileptonic 
decays which are induced by the transitions 
at the quark level. We investigate the New Physics leptoquark effects in the observables including the differential branching fractions and their ratios, lepton forward–backward asymmetry and lepton polarization asymmetry. We find the contributions of the vector leptoquark to the differential branching fractions and their ratios to be significant, and they show large deviations from the corresponding Standard Model predictions, while the lepton forward–backward asymmetry and the lepton polarization asymmetry in the leptoquark scenario show the same behaviors as that in the Standard Model.
© The Author(s), 2019
