Beyond Minimal Lepton Flavored Dark Matter
Mu-Chun Chen, Jinrui Huang, Volodymyr Takhistov

TL;DR
This paper explores a novel class of flavored dark matter models interacting with leptons, allowing for complex flavor structures beyond minimal flavor violation, with implications for collider searches and dark matter stability.
Contribution
It introduces a beyond MFV framework for lepton-flavored dark matter, analyzing flavor-changing effects, stability conditions, and collider signatures in a comprehensive manner.
Findings
Large flavor-changing couplings are possible within the model.
Dark matter mass can be below the TeV scale.
Potential collider signatures at lepton and hadron colliders.
Abstract
We consider a class of flavored dark matter (DM) theories where dark matter interacts with the Standard Model lepton fields at the renormalizable level. We allow for a general coupling matrix between the dark matter and leptons whose structure is beyond the one permitted by the minimal flavor violation (MFV) assumption. It is assumed that this is the only new source of flavor violation in addition to the Standard Model (SM) Yukawa interactions. The setup can be described by augmenting the SM flavor symmetry by an additional , under which the dark matter transforms. This framework is especially phenomenologically rich, due to possible novel flavor-changing interactions which are not present within the more restrictive MFV framework. As a representative case study of this setting, which we call "beyond MFV" (BMFV), we consider Dirac fermion dark matter which…
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