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)
- Anuchin Research Institute and Museum of Anthropology, Österreichische Akademie der Wissenschaften (ÖAW), Universität Wien
- 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