Theoretical analysis of the leptonic decays B →ℓℓℓ ν ¯ ℓ

Autor(en)

Mikhail A. Ivanov, Dmitri Melikhov

Abstrakt

We study the effects of identical leptons in the final state of the B+→ℓ+ℓ-ℓ+ν¯ℓ decay. The amplitude of the process is described by the same form factors as the amplitude of the B→ℓℓℓ′ν¯ℓ′ decay for nonidentical leptons in the final state. However, the differential distributions are strongly different, as the B+→ℓ+ℓ-ℓ+ν¯ℓ amplitude contains both the direct (Ma) and exchange (Mb) diagrams. We calculate a number of the differential distributions. In particular, we propose an interesting observable that can be readily measured experimentally: the differential distribution over the invariant mass of the pair of leptons of the same charge, ℓ+ℓ+. The good news is that the interference between Ma and Mb, dBab is found to be at the level of less than 1% in all considered differential distributions and therefore can be neglected in the full kinematical region of this decay.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

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

Journal

Physical Review D

Band

105

Anzahl der Seiten

8

ISSN

2470-0010

DOI

https://doi.org/10.1103/PhysRevD.105.094038

Publikationsdatum

05-2022

Peer-reviewed

Ja

ÖFOS 2012

103034 Teilchenphysik

ASJC Scopus Sachgebiete

Physics and Astronomy (miscellaneous)

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/theoretical-analysis-of-the-leptonic-decays-b----(d583fc75-0f84-4748-886b-956374ca973e).html