A Mathematica Package for Calculation of One-Loop Penguins in FCNC Processes

Abstract

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. Both vector and scalar external legs are considered. 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 the tree level.

16 pages, 7 figures. The version accepted for publication in IJMPC

References in corpus (5)

• FeynRules - Feynman rules made easy
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• SARAH 3.2: Dirac Gauginos, UFO output, and more
• A Flavor Kit for BSM models
• LanHEP - a package for automatic generation of Feynman rules from the Lagrangian. Updated version 3.1

Cited by in corpus (2)

• Dark photon and dark $Z$ mediated $B$ meson decays
• Searching for charged lepton flavor violation at $ep$ colliders