Speaker
Dmitri Melikhov
(HEPHY)
Description
We revisit the calculation of nonfactorizable corrections induced by charm-quark loops in exclusive FCNC $B$-decays. We demonstrate that the calculation of the corresponding correlation function requires the knowledge of the full generic three-particle quark-antiquark-gluon distribution amplitude of the B-meson with non-aligned arguments, $\langle 0| \bar q(x) G_{\mu\nu}(y)b(0)|B\rangle$. The dependence of this quantity on $(x − y)^2$ is essential for a proper account of large $(\Lambda_{QCD}m_b/m_c^2)^n$ terms in the amplitudes of exclusive FCNC $B$-decays.
Authors
Anastasiia Kozachuk
(Lomonosov Moscow State University)
Dmitri Melikhov
(HEPHY)
