Nonfactorizable charm-loop effects in exclusive FCNC B-decays

Author(s)
Dmitri Melikhov, Anastasiia Kozachuk
Abstract

This talk presents our recent results [1] on nonfactorizable charm-loop contributions to the amplitudes of rare exclusive B-decays induced by flavour-changing neutral currents (FCNC). We show that such contributions induced by a soft-gluon emission from the charm-quark loop may be expressed via three-particle quark-antiquark-gluon distribution amplitude (3DA) of the Bmeson, <0|q¯(x)Gµν(y)b(0)|B(p)>, and the knowledge of the full functional dependence of the latter quantity on the variable (x−y)2 is necessary for a proper summation of potentially large terms O((ΛQCDmb/m2c)n) in the amplitudes of FCNC B-decays.

Organisation(s)
Particle Physics
External organisation(s)
Lomonosov Moscow State University (MSU), Österreichische Akademie der Wissenschaften (ÖAW), Universität Wien, D. V. Skobeltsyn Institute of Nuclear Physics
Journal
Proceedings of Science (PoS)
Volume
364
No. of pages
7
DOI
https://doi.org/10.22323/1.364.0230
Publication date
11-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
103034 Particle physics, 103012 High energy physics
ASJC Scopus subject areas
General
Portal url
https://ucris.univie.ac.at/portal/en/publications/nonfactorizable-charmloop-effects-in-exclusive-fcnc-bdecays(907c9556-9773-4a2c-8cde-cfcffe41005f).html