publication . Article . Preprint . 2018

Leptonic dark matter with scalar dilepton mediator

Ernest Ma;
Open Access
  • Published: 13 Dec 2018 Journal: Modern Physics Letters A, volume 33, page 1,850,226 (issn: 0217-7323, eissn: 1793-6632, Copyright policy)
  • Publisher: World Scientific Pub Co Pte Lt
Abstract
A simple and elegant mechanism is proposed to resolve the problem of having a light scalar mediator for self-interacting dark matter and the resulting disruption to the cosmic microwave background (CMB) at late times by the former's enhanced Sommerfeld production and decay. The crucial idea is to have Dirac neutrinos with the conservation of U(1) lepton number extended to the dark sector. The simplest scenario consists of scalar or fermion dark matter with unit lepton number accompanied by a light scalar dilepton mediator, which decays to two neutrinos.
Subjects
arXiv: High Energy Physics::ExperimentAstrophysics::Cosmology and Extragalactic AstrophysicsHigh Energy Physics::Phenomenology
free text keywords: Nuclear and High Energy Physics, Astronomy and Astrophysics, High Energy Physics - Phenomenology, Cosmic microwave background, Particle physics, Scalar (physics), Dirac (video compression format), Dark matter, Physics, Lepton number, Fermion, Neutrino

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