arXiv:1507.03700·v1·High Energy Physics — Phenomenology
Two-loop current-current operator contribution to the non-leptonic QCD penguin amplitude
Guido Bell🇬🇧 · Martin Beneke🇩🇪 · Tobias Huber🇩🇪 · Xin-Qiang Li🇨🇳
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.
Comments: 14 pages, 4 figures, 1 table