Journal article
Semivisible dark photon phenomenology at the GeV scale
Physical review. D, Vol.108(1), 015032
07/25/2023
DOI: 10.1103/PhysRevD.108.015032
Abstract
In rich dark sector models, dark photons heavier than tens of MeV can behave as semivisible particles; their decays contain both visible and invisible final states. We present models containing multiple dark fermions which allow for such decays and inscribe them in the context of inelastic dark matter and heavy neutral leptons scenarios. Our models represent a generalization of the traditional inelastic dark matter model by means of a charge conjugation symmetry. We revisit constraints on dark photons from e+e- colliders and fixed-target experiments, including the effect of analysis vetoes on semivisible decays, A' & RARR; & psi;i(& psi;j & RARR; & psi;kl+l-). We find that in some cases the BABAR and NA64 experiments no longer exclude large kinetic mixing, & epsilon; & SIM; 10-2, and, specifically, the related explanation of the discrepancy in the muon (g - 2). This reopens an interesting window in parameter space for dark photons with exciting discovery prospects. We point out that a modified missing-energy search at NA64 can target short-lived A' decays and directly probe the newly-open parameter space.
Details
- Title: Subtitle
- Semivisible dark photon phenomenology at the GeV scale
- Creators
- Asli M. Abdullahi - Fermi National Accelerator LaboratoryMatheus Hostert - University of MinnesotaDaniele Massaro - Osservatorio astronomico di BolognaSilvia Pascoli - Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
- Resource Type
- Journal article
- Publication Details
- Physical review. D, Vol.108(1), 015032
- DOI
- 10.1103/PhysRevD.108.015032
- ISSN
- 2470-0010
- eISSN
- 2470-0029
- Publisher
- Amer Physical Soc
- Number of pages
- 39
- Grant note
- DE-AC02-07CH11359 / U.S. Department of Energy; United States Department of Energy (DOE) H2020-MSCA-ITN-2019/860881-HIDDeN; 101086085ASYMMETRY / European Union; European Union (EU) Government of Canada through the Department of Innovation, Science and Economic Development Province of Ontario through the Ministry of Colleges and Universities Fermi National Accelerator Laboratory; United States Department of Energy (DOE); University of Chicago
- Language
- English
- Date published
- 07/25/2023
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984945916702771
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