Heavy neutral lepton search and μ→ e γ constraints in case of type-I seesaw

2024/03/01 by Stefano Morisi, Morisi, Stefano
Computer Science · #Advanced Data Storage Technologies #Advanced Image and Video Retrieval Techniques #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Image Processing and 3D Reconstruction

paper · pdf · doi:10.48550/arxiv.2403.00983

openalex publication_date 2024/03/01 · openalex created_date 2024/03/06 · openalex updated_date 2026/07/28

Abstract

Within type-I seesaw mechanism it is possible to have large (order one) light-heavy neutrino mixing even in case of low right-handed neutrino mass scale (of the order of GeV). This implies large lepton flavor violation. As example we consider the process μ→ e γ that can have a branching up to 10^-8 within type-I seesaw (in contrast with the tiny value 10^-54 expected). Such an enhancing of lepton flavor violation can be used to constraint the parameter space of long lived particle experiments.

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