Neutron Stars Exclude Light Dark Baryons

Physical Review Letters
David McKeenDake Zhou

Abstract

Exotic particles carrying baryon number and with a mass of the order of 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 a mass greater than 0.7  M_{⊙} 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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Citations

Sep 17, 2019·Physical Review Letters·Benjamín GrinsteinNiklas Grønlund Nielsen
Aug 25, 2018·Physical Review Letters·Gordon BaymJessie Shelton
Dec 19, 2020·Physical Review Letters·David McKeenNirmal Raj
Mar 3, 2021·The Review of Scientific Instruments·Z TangR W Pattie
May 8, 2021·Physical Review Letters·Rebecca K Leane, Juri Smirnov
Aug 24, 2021·Physical Review Letters·David McKeenNirmal Raj

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