Nonfactorizable charm-loop effects in exclusive FCNC B-decays
- Autor(en)
- Dmitri Melikhov, Anastasiia Kozachuk
- Abstrakt
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(en)
- Teilchenphysik
- Externe Organisation(en)
- Lomonosov Moscow State University (MSU), Österreichische Akademie der Wissenschaften (ÖAW), Universität Wien
- Journal
- Proceedings of Science (PoS)
- Band
- 364
- Anzahl der Seiten
- 7
- DOI
- https://doi.org/10.22323/1.364.0230
- Publikationsdatum
- 11-2020
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103034 Teilchenphysik, 103012 Hochenergiephysik
- ASJC Scopus Sachgebiete
- General
- Link zum Portal
- https://ucris.univie.ac.at/portal/de/publications/nonfactorizable-charmloop-effects-in-exclusive-fcnc-bdecays(907c9556-9773-4a2c-8cde-cfcffe41005f).html