Work

Impact of CPV phases on flavour violating H and Z decays

Year: 2024

Type: conference-paper

Abstract: Standard Model extensions via heavy neutral leptons lead to modifications in the lepton mixing matrix, including new Dirac and Majorana CP violating phases. Here we consider the role of the Majorana fermions and of the new CP violating phases in Higgs and $Z$-boson lepton flavour violating decays, as well as in the corresponding CP-asymmetries. We confirm that these decays are sensitive to the presence of additional sterile states and show that the new CP violating phases may lead to both destructive and constructive interferences in the decay rates. Interestingly the $Z\to \mu^\pm\tau^\mp$ rates are within FCC-ee reach, with associated CP-asymmetries that can potentially reach up to 30%.

Source: International Conference on B-Physics at Frontier Machines (BEAUTY)

DOI: 10.22323/1.443.0061

Authors: Emanuelle Pinsard, Asmaa Abada, Jonathan Kriewald, Salvador Rosauro-Alcaraz, Ana M. Teixeira

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: European Commission, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules

Awards: Hunting Invisibles: Dark sectors, Dark matter and Neutrinos, G434337789

OpenAlex ID: W4404149909

FWCI:

Cites:

Cited by:

Related to: 10