Two-loop matrix element of the current-current operator in the decay B→Xsγ

Andrzej J. Buras, Andrzej Czarnecki, Mikolaj S. Misiak, J. örg Urban

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

We evaluate important two-loop matrix element 〈sγ|Q2|b〉 of the operator (c̄γμPLb)(s̄γμPLb) contributing to the inclusive radiative decay B→Xsγ. The calculation is performed in the NDR scheme, by means of asymptotic expansions method. The result is given as a series in z≡mc2/mb2 up to O(z6). We confirm the result of Greub, Hurth and Wyler obtained by a different method up to O(z3). Higher-order terms are found to be numerically insignificant.

Original languageEnglish
Pages (from-to)488-502
Number of pages15
JournalNuclear Physics, Section B
Volume611
Issue number1-3
DOIs
StatePublished - 17 Sep 2001

Fingerprint

Dive into the research topics of 'Two-loop matrix element of the current-current operator in the decay B→Xsγ'. Together they form a unique fingerprint.

Cite this