Theoretical analysis of the leptonic decays B →ℓℓℓ ν ¯ ℓ
- Author(s)
- Mikhail A. Ivanov, Dmitri Melikhov
- Abstract
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(s)
- Particle Physics
- External organisation(s)
- Anuchin Research Institute and Museum of Anthropology, Universität Wien, Joint Institute for Nuclear Research
- Journal
- Physical Review D
- Volume
- 105
- No. of pages
- 8
- ISSN
- 2470-0010
- DOI
- https://doi.org/10.1103/PhysRevD.105.094038
- Publication date
- 05-2022
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103034 Particle physics
- ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/theoretical-analysis-of-the-leptonic-decays-b----(d583fc75-0f84-4748-886b-956374ca973e).html