https://doi.org/10.1140/epjc/s10052-018-6044-1
Regular Article - Theoretical Physics
New gauge boson 
and radiative leptonic decays of charged B and D mesons
School of Physics and Electronic Technology, Liaoning Normal University, Dalian, 116029, People’s Republic of China
* e-mail: zuoyabing@lnnu.edu.cn
Received:
30
December
2017
Accepted:
2
July
2018
Published online:
12
July
2018
Considering the constraints on model parameters from the latest experimental data, we study the contributions of new gauge boson predicted by the general 221 models to the radiative leptonic decays of charged B and D mesons. It is found that the largest contributions of in the non-universal 221 model to the branching fractions occur in the decay modes 
and 
, which can reach to about 
of the corresponding SM values in the up-quark mixing scenario. In contrast, the relative corrections of predicted by the un-unified 221 model to the branching fractions are very tiny and identical for all the decay modes.
© The Author(s), 2018
