https://doi.org/10.1140/epjc/s10052-014-2911-6
Regular Article - Theoretical Physics
Rare 
and 
decays in the relativistic quark model
Dorodnicyn Computing Centre, Russian Academy of Sciences, Vavilov Str. 40, 119333 , Moscow, Russia
* e-mail: galkin@ccas.ru
Received:
20
March
2014
Accepted:
15
May
2014
Published online:
3
June
2014
The branching fractions of the rare weak 
and 
decays are calculated in the framework of the relativistic quark model based on the quasipotential approach. The form factors parametrizing weak decay matrix elements are explicitly determined in the whole kinematical 
range without additional assumptions and extrapolations. Relativistic effects are systematically taken into account, including recoil effects in meson wave functions and contributions of the intermediate negative-energy states. New experimental data on the differential distributions in the semileptonic heavy-to-light 
and 
decays are analyzed in detail. Good agreement of the predictions and data is found. The results obtained for the branching fractions of the rare semileptonic decays are found to be in agreement with other theoretical estimates and recent experimental data available for the 
decay.
© SIF and Springer-Verlag Berlin Heidelberg, 2014
