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Neutron stars exclude light dark baryons

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arxiv 1802.08244 v1 pith:RG6PIOB3 submitted 2018-02-22 hep-ph astro-ph.COnucl-exnucl-th

Neutron stars exclude light dark baryons

classification hep-ph astro-ph.COnucl-exnucl-th
keywords massneutrondarkparticlesstarsbaryogenesisbaryonbaryons
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Exotic new particles carrying baryon number and with mass of order the nucleon mass have been proposed for various reasons including baryogenesis, dark matter, mirror worlds, and the neutron lifetime puzzle. We show that the existence of neutron stars with mass greater than 0.7 $M_\odot$ places severe constraints on such particles, requiring them to be heavier than 1.2 GeV or to have strongly repulsive self-interactions.

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Cited by 3 Pith papers

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    Introduces echo signatures from vector long-lived particles in nucleon decay, showing high geometric acceptance up to 80% in Super-K, Hyper-K and JUNO for a range of decay lengths.

  3. Bulk viscosity from neutron decays to dark baryons in neutron star matter

    astro-ph.HE 2025-09 conditional novelty 5.0

    Neutron dark decays modify the equation of state and either mildly suppress or strongly enhance bulk viscosity in neutron star merger conditions, depending on the in-medium decay rate.