DOE OSTI · 2480744
Insights from binary pulsars and laboratories into baryon number violation: Implications for GeV dark matter
Abstract
Rare processes in laboratory and within astrophysical environments can be highly sensitive probes of baryon-number-violating interactions at the TeV scale. We demonstrate the power of neutron stars to constrain baryon-number violation by considering a minimal extension of the standard model involving a TeV-mass scalar mediator and a GeV scale Majorana fermion ψ . We find that a Δ B = 2 mass-loss process in binary pulsar systems via n → γ ψ and the subsequent scattering ψ n → π − K + places stringent constraints on the model parameter space. These limits will become much stronger, due to the possibility of Λ → γ ψ decays at the tree level, if the neutron star equation of state is hyperonic. We compare these constraints with ongoing and future collider experiments, n − n ¯ oscillations, and dinucleon decay searches at future large-scale neutrino experiments, finding that the binary pulsars bounds on couplings are significantly tighter for specific flavor combinations. Published by the American Physical Society 2024
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Allahverdi, Rouzbeh (ORCID:0000000271343989), Thompson, Adrian (ORCID:0000000292350846), Zakeri, Mohammadreza (ORCID:0000000265105343). 2024-12-10. Insights from binary pulsars and laboratories into baryon number violation: Implications for GeV dark matter. https://doi.org/10.1103/physrevd.110.115010
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