Two loop virtual corrections to [Formula omitted] and [Formula omitted] for arbitrary momentum transfer

Non-factorizable two loop corrections to heavy to light flavor changing neutral current transitions due to matrix elements of current-current operators are calculated analytically for arbitrary momentum transfer. This extends previous work on [Formula omitted] transitions. New results for [Formula o...

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Veröffentlicht in:The European physical journal. C, Particles and fields Particles and fields, 2017-11, Vol.77 (11)
1. Verfasser: de Boer, Stefan
Format: Artikel
Sprache:eng
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Zusammenfassung:Non-factorizable two loop corrections to heavy to light flavor changing neutral current transitions due to matrix elements of current-current operators are calculated analytically for arbitrary momentum transfer. This extends previous work on [Formula omitted] transitions. New results for [Formula omitted] transitions are presented. Recent work on polylogarithms is used for the master integrals. For [Formula omitted] transitions, the corrections are most significant for the imaginary parts of the effective Wilson coefficients in the large hadronic recoil range. Analytical results and ready-to-use fitted results for a specific set of parameters are provided.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-017-5364-x