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