Two-Loop Matrix Element of the Current-Current Operator in the Decay B -> X_s gamma

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dc.creatorBuras, Andrzej J.
dc.creatorCzarnecki, Andrzej
dc.creatorMisiak, Mikolaj
dc.creatorUrban, Joerg
dc.date2001-05-16
dc.date.accessioned2026-07-07T11:31:06Z
dc.date.available2026-07-07T11:31:06Z
dc.descriptionWe evaluate the important two-loop matrix element <s gamma| Q_2 | b> of the operator (cbar gamma^mu P_L b) (sbar gamma_mu P_L b) contributing to the inclusive radiative decay B -> X_s gamma. The calculation is performed in the NDR scheme, by means of asymptotic expansions method. The result is given as a series in z = m_c^2/m_b^2 up to O(z^6). We confirm the result of Greub, Hurth and Wyler obtained by a different method up to 0(z^3). Higher-order terms are found to be numerically insignificant.
dc.description18 pages, 6 figures, 1 table
dc.identifierhttps://arxiv.org/abs/hep-ph/0105160
dc.identifierhttp://arxiv.org/abs/hep-ph/0105160
dc.identifierNucl.Phys.B611:488-502,2001
dc.identifierdoi:10.1016/S0550-3213(01)00336-4
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197162
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTwo-Loop Matrix Element of the Current-Current Operator in the Decay B -> X_s gamma
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