The Mathematica package for calculation of one-loop penguin diagrams for FCNC processes
Alexander Vadimovich Bednyakov, Şükrü Hanif Tanyıldızı · 2013
In this work, we present a Mathematica package Peng4BSM@LO which calculates the contributions to the Wilson Coefficients of certain effective operators originating from the one-loop penguin Feynman diagrams. The key feature of our package is the ability to find the corresponding expressions in almost any New Physics model which extends the SM and has no flavour changing neutral current (FCNC) transitions at tree level.