Resonant CP violation in rare τ± decays

A bstract In this work, we study the lepton number violating tau decays via intermediate on-shell Majorana neutrinos N j into two scalar mesons and a lepton τ ± → M 1 ± N j → M 1 ± M 2 ± ℓ ∓ . We calculate the Branching ratios Br ( τ ± ) and the CP asymmetry (Γ( τ + ) − Γ( τ − )) / (Γ( τ + ) + Γ...

Full description

Saved in:

Bibliographic Details
Published in:	The journal of high energy physics Vol. 2017; no. 5; pp. 1 - 17
Main Author:	Zamora-Saa, Jilberto
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Springer Berlin Heidelberg 01-05-2017 SpringerOpen
Subjects:	Beyond Standard Model Classical and Quantum Gravitation CP violation Elementary Particles Neutrino Physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Theoretical Physics Relativity Theory String Theory Neutrino Physics CP violation Beyond Standard Model
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	A bstract In this work, we study the lepton number violating tau decays via intermediate on-shell Majorana neutrinos N j into two scalar mesons and a lepton τ ± → M 1 ± N j → M 1 ± M 2 ± ℓ ∓ . We calculate the Branching ratios Br ( τ ± ) and the CP asymmetry (Γ( τ + ) − Γ( τ − )) / (Γ( τ + ) + Γ( τ − )) for such decays, in a scenario that contains at least two heavy Majorana neutrinos. The results show that the CP asymmetry is small, but becomes comparable with the branching ratio Br( τ ± ) when their mass difference is similar with their decay width Δ M N ∼ Γ N . We also present regions of the heavy-light neutrino mixing elements, in which the CP asymmetry could be explored in future tau factories.
ISSN:	1029-8479 1029-8479
DOI:	10.1007/JHEP05(2017)110