Two-loop current-current operator contribution to the non-leptonic QCD penguin amplitude
arXiv:1507.03700 · doi:10.1016/j.physletb.2015.09.037
Abstract
The computation of direct CP asymmetries in charmless B decays at next-to-next-to-leading order (NNLO) in QCD is of interest to ascertain the short-distance contribution. Here we compute the two-loop penguin contractions of the current-current operators Q_{1,2} and provide a first estimate of NNLO CP asymmetries in penguin-dominated b -> s transitions.
14 pages, 4 figures, 1 table