  Cosmic positron anomaly is still not explained. Explanation with dark matter
(DM) decay or annihilation is one of the main attempts to do it. But they
suffer with shortcoming as overproduction of induced gamma-radiation which
contradict to cosmic gamma-background. Final state radiation (FSR) in such
processes is supposed under standard conditions (by default) to have the basic
contribution in it. Our group elaborates possibility to evade this problem in
different ways. Here we continue one of them connected with possibility of
suppression of FSR due to specifics of Lagrangian describing DM particle decay.
Loop through two new spinors and scalar is considered. Effect of FSR
suppression is found to be existing but at the very low level in the considered
case.
