https://doi.org/10.1140/epjc/s10052-017-5364-x
Regular Article - Theoretical Physics
Two loop virtual corrections to 
and 
for arbitrary momentum transfer
Fakultät für Physik, TU Dortmund, Otto-Hahn-Str.4, 44221, Dortmund, Germany
* e-mail: stefan.boer@kit.edu
Received:
31
July
2017
Accepted:
4
November
2017
Published online:
23
November
2017
Non-factorizable two loop corrections to heavy to light flavor changing neutral current transitions due to matrix elements of current–current operators are calculated analytically for arbitrary momentum transfer. This extends previous work on transitions. New results for transitions are presented. Recent work on polylogarithms is used for the master integrals. For 
transitions, the corrections are most significant for the imaginary parts of the effective Wilson coefficients in the large hadronic recoil range. Analytical results and ready-to-use fitted results for a specific set of parameters are provided.
© The Author(s), 2017
