NNLO fermionic corrections to the charm quark mass dependent matrix elements in B -> X_s gamma

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dc.creatorBoughezal, R.
dc.creatorCzakon, M.
dc.creatorSchutzmeier, T.
dc.date2007-07-20
dc.date2007-08-03
dc.date.accessioned2026-07-07T12:42:22Z
dc.date.available2026-07-07T12:42:22Z
dc.descriptionWe compute the virtual O(alpha_s^2) fermionic contributions to the charm quark mass dependent matrix elements of the B -> X_s gamma decay. In the case of a massless quark loop insertion into the gluon propagator, our result obtained as an expansion in z=m_c^2/m_b^2 and an exact expression in terms of multi-fold MB integrals, confirms the findings of Bieri, Greub and Steinhauser [19]. We observe, however, large deviations in the case of a b-quark loop insertion.The charm quark loop shows smaller, but still noticeable differences.
dc.description11 pages, 3 figures, 1 table
dc.identifierhttps://arxiv.org/abs/0707.3090
dc.identifierhttp://arxiv.org/abs/0707.3090
dc.identifierJHEP 0709:072,2007
dc.identifierdoi:10.1088/1126-6708/2007/09/072
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220057
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNNLO fermionic corrections to the charm quark mass dependent matrix elements in B -> X_s gamma
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