@article{57c3083f95ff48afb2faa33cf8fa82e2,
title = "Two-loop matrix element of the current-current operator in the decay B→Xsγ",
abstract = "We evaluate important two-loop matrix element 〈sγ|Q2|b〉 of the operator ({\=c}γμPLb)({\=s}γμPLb) 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.",
author = "Buras, {Andrzej J.} and Andrzej Czarnecki and Misiak, {Mikolaj S.} and Urban, {J. {\"o}rg}",
note = "Funding Information: This work was supported by Deutscher Akademischer Austauschdienst (DAAD), by the Natural Sciences and Engineering Research Council (NSERC), and by the German Bundesministerium f{\"u}r Bildung und Forschung under contract 05HT9WOA0. M.M. was supported by the Polish Committee for Scientific Research under grant 2 P03B 121 20.",
year = "2001",
month = sep,
day = "17",
doi = "10.1016/S0550-3213(01)00336-4",
language = "English",
volume = "611",
pages = "488--502",
journal = "Nuclear Physics, Section B",
issn = "0550-3213",
publisher = "Elsevier B.V.",
number = "1-3",
}