Nonfactorizable charming loops in FCNC B decays versus B -decay semileptonic form factors

Autor(en)

Dmitri Melikhov

Abstrakt

We compare a nonfactorizable charming-loop correction to an exclusive FCNC B decay given in terms of the three-particle Bethe-Salpeter amplitude (3BS) of the B meson, «0|q¯(x)Gμν(z)b(0)|B(p)», with the corresponding correction to the B-meson semileptonic form factor. In spite of certain similarities, these two corrections are shown to have substantial differences: the form-factor correction is dominated by the collinear light-cone configuration of 3BS (zμ=uxμ, 0<u<1, x2=0); in contrast, the FCNC amplitude is dominated by a different configuration with noncollinear arguments [x2=0, z2=0, but (x-z)2≠0 (i.e., zμ≠uxμ)].

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Lomonosov Moscow State University (MSU), Universität Wien, Joint Institute for Nuclear Research

Journal

Physical Review D

Band

106

Anzahl der Seiten

9

ISSN

2470-0010

DOI

https://doi.org/10.1103/PhysRevD.106.054022

Publikationsdatum

09-2022

Peer-reviewed

Ja

ÖFOS 2012

103034 Teilchenphysik

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/nonfactorizable-charming-loops-in-fcnc-b-decays-versus-b-decay-semileptonic-form-factors(89762e34-e485-4efb-89b0-80fdb6acdade).html