TY - JOUR
T1 - Spectator scattering at NLO in non-leptonic B decays
T2 - Tree amplitudes
AU - Beneke, M.
AU - Jäger, S.
PY - 2006/9/4
Y1 - 2006/9/4
N2 - We compute the 1-loop (αs2) correction to hard spectator scattering in non-leptonic B decay tree amplitudes. This forms part of the NNLO contribution to the QCD factorization formula for hadronic B decays, and introduces a new rescattering phase that corrects the leading-order result for direct CP asymmetries. Among the technical issues, we discuss the cancellation of infrared divergences, and the treatment of evanescent four-quark operators. The infrared finiteness of our result establishes factorization of spectator scattering at the 1-loop order. Depending on the values of hadronic input parameters, the new 1-loop correction may have a significant impact on tree-dominated decays such as B → π π.
AB - We compute the 1-loop (αs2) correction to hard spectator scattering in non-leptonic B decay tree amplitudes. This forms part of the NNLO contribution to the QCD factorization formula for hadronic B decays, and introduces a new rescattering phase that corrects the leading-order result for direct CP asymmetries. Among the technical issues, we discuss the cancellation of infrared divergences, and the treatment of evanescent four-quark operators. The infrared finiteness of our result establishes factorization of spectator scattering at the 1-loop order. Depending on the values of hadronic input parameters, the new 1-loop correction may have a significant impact on tree-dominated decays such as B → π π.
UR - http://www.scopus.com/inward/record.url?scp=33746192172&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysb.2006.06.010
DO - 10.1016/j.nuclphysb.2006.06.010
M3 - Article
AN - SCOPUS:33746192172
SN - 0550-3213
VL - 751
SP - 160
EP - 185
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - 1-2
ER -