PoS - Proceedings of Science
Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Flavour Physics and CP Violation
Nonfactorizable charm-loop effects in exclusive FCNC B-decays
D. Melikhov,* A. Kozachuk
*corresponding author
Full text: Not available
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 $B$-meson, $\langle 0|\bar q(x)G_{\mu\nu}(y)b(0)|B(p)\rangle$, 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 $O\left(\left(\Lambda_{QCD}m_b/m_c^2\right)^n\right)$ in the amplitudes of FCNC $B$-decays.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.