NNLL QCD Contribution of the Electromagnetic Dipole Operator to Gamma(anti-B -> X(s) gamma)

• Main Authors: Asatrian, H. M, Hovhannisyan, A, Poghosyan, V, Ewerth, T, Greub, C, Hurth, T
• Format: Journal Article
• Language: English
• Published: 30.04.2006
• Subjects: Physics - High Energy Physics - Phenomenology
• DOI: 10.48550/arxiv.hep-ph/0605009

Nucl.Phys.B749:325-337,2006 We present an independent calculation of that part of the O(\alpha_s^2) contribution to the decay width \Gamma(\bar B -> X_s \gamma) which arises from the self-interference term of the electromagnetic dipole operator O_7. Using a different method, we find complete agreement with a previous calculation. This NNLL contribution is an important ingredient for the complete NNLL prediction of \Gamma(\bar B -> X_s \gamma) which will resolve the charm quark mass ambiguity appearing at NLL accuracy.