Journal Article

Unraveling the Scotogenic model at muon collider

Liu, Jiao, Li, Honglei, Han, Zhi-Long, Jin, Yi

2022

Overview

A bstract The Scotogenic model extends the standard model with three singlet fermion N i and one inert doublet scalar η to address the common origin of tiny neutrino mass and dark matter. For fermion dark matter N 1 , a hierarchical Yukawa structure ∣ y 1 e ∣ ≪ ∣ y 1 μ ∣ ∼ ∣ y 1 τ ∣ ∼ O 1 is usually favored to satisfy constraints from lepton flavor violation and relic density. Such large μ -related Yukawa coupling would greatly enhance the pair production of charged scalar η ± at the muon collider. In this paper, we investigate the dilepton and mono-photon signature of the Scotogenic model at a 14 TeV muon collider. For the dimuon signature , we find that most viable samples can be probed with 200 fb − 1 data. The ditau signature is usually less promising, but it is important to probe the small |y 1 μ | region. The mono-photon signature could also probe the compressed mass region M 1 ≲ M η ± . Masses of charged scalar η ± and dark matter N 1 can be further extracted by a binned likelihood fit of the dilepton energy.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V,SpringerOpen
• Subject: Classical and Quantum Gravitation / Dark matter / Dark Matter at Colliders / Elementary Particles / Fermions / Flavor (particle physics) / High energy physics / Leptons / Muons / Neutrinos / Pair production / Particle Nature of Dark Matter / Photons / Physics / Physics and Astronomy / Quantum Field Theories / Quantum Field Theory / Quantum Physics / Regular Article - Theoretical Physics / Relativity Theory / Standard model (particle physics) / String Theory