2020/07/31 by Gongjun Choi, Tsutomu T. Yanagida, Norimi Yokozaki · 33 citations
Physics and Astronomy · #Anomaly (physics) #Boson #Cosmic microwave background #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gauge (firearms) #Gauge boson #Gauge theory #Higgs boson #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #Scalar (mathematics) #Scalar boson #Standard Model (mathematical formulation) #Vector boson #astro-ph.CO #hep-ph
paper · pdf · doi:10.1016/j.physletb.2020.135836
published in Physics Letters B 810, 135836 (Elsevier BV) · 5 pages, 1 figure, the way of producing the parent scalar energy density is changed, the conclusion remains unchanged
openalex created_date 2020/07/16 · arxiv created 2020/09/06 · openalex publication_date 2020/10/01 · arxiv updated 2020/10/08 · openalex updated_date 2026/08/05
The recent observation of an excess in the electronic recoil data by the XENON1T detector has drawn many attentions as a potential hint for an extension of the Standard Model (SM). Absorption of a vector boson with the mass of mA′∈(2keV,3keV) is one of the feasible explanations to the excess. In the case where the vector boson explains the dark matter (DM) population today, it is highly probable that the vector boson belongs to a class of the warm dark matter (WDM) due to its suspected mass regime. In such a scenario, providing a good fit for the excess, the kinetic mixing κ∼10−15 asks for a non-thermal origin of the vector DM. In this letter, we consider a scenario where the gauge boson is nothing but the U(1)B−L gauge boson and its non-thermal origin is attributed to the decay of the coherently oscillating scalar of which condensation induces the spontaneous breaking of U(1)B−L. We discuss implications for the early universe physics when the warm nature of the vector DM serves as a resolution to both the small scale problems that ΛCDM model encounters and the XENON1T anomaly.