Revisiting nonfactorizable charm-loop effects in exclusive FCNC Β-decays
- Autor(en)
- Anastasiia Kozachuk, Dmitri Melikhov
- Abstrakt
We revisit the calculation of nonfactorizable corrections induced by charm-quark loops in exclusive FCNC B-decays. For the sake of clarity, we make use of a field theory with scalar particles: this allows us to focus on the conceptual issues and to avoid technical complications related to particle spins in QCD. We perform a straightforward calculation of the appropriate correlation function and show that it requires the knowledge of the full generic three-particle distribution amplitude with non-aligned arguments, 〈0|s¯(y)Gμν(x)b(0)|B(p)〉. Moreover, the dependence of this quantity on the variable (x−y)2 is essential for a proper account of the (ΛQCDmb/m2/c)n terms in the amplitudes of FCNC B-decays.
- Organisation(en)
- Externe Organisation(en)
- Lomonosov Moscow State University (MSU), Österreichische Akademie der Wissenschaften (ÖAW), Universität Wien
- Journal
- Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- Band
- 786
- Seiten
- 378-381
- Anzahl der Seiten
- 4
- ISSN
- 0370-2693
- DOI
- https://doi.org/10.1016/j.physletb.2018.10.026
- Publikationsdatum
- 11-2018
- 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/revisiting-nonfactorizable-charmloop-effects-in-exclusive-fcnc-decays(fa3cf167-8573-449c-9692-dc47497b4686).html