Testing Dark Decays of Baryons in Neutron Stars

Gordon Baym, D. H. Beck, Peter Geltenbort, Jessie Shelton

Research output: Contribution to journalArticlepeer-review


The observation of neutron stars with masses greater than one solar mass places severe demands on any exotic neutron decay mode that could explain the discrepancy between beam and bottle measurements of the neutron lifetime. If the neutron can decay to a stable, feebly interacting dark fermion, the maximum possible mass of a neutron star is 0.7M, while all well-measured neutron star masses exceed one M. The existence of 2M neutron stars further indicates that any explanation beyond the standard model for the neutron lifetime puzzle requires dark matter to be part of a multiparticle dark sector with highly constrained interactions. Beyond the neutron lifetime puzzle, our results indicate that neutron stars provide unique and useful probes of GeV-scale dark sectors coupled to the standard model via baryon-number-violating interactions.

Original languageEnglish (US)
Article number061801
JournalPhysical review letters
Issue number6
StatePublished - Aug 6 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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