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Title: Testing Dark Decays of Baryons in Neutron Stars

Abstract

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

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF)
OSTI Identifier:
1463059
Alternate Identifier(s):
OSTI ID: 1498967
Grant/Contract Number:  
SC0017840; PHY-1506416; PHY- 1714042
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 121 Journal Issue: 6; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Baym, Gordon, Beck, D. H., Geltenbort, Peter, and Shelton, Jessie. Testing Dark Decays of Baryons in Neutron Stars. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.121.061801.
Baym, Gordon, Beck, D. H., Geltenbort, Peter, & Shelton, Jessie. Testing Dark Decays of Baryons in Neutron Stars. United States. doi:10.1103/PhysRevLett.121.061801.
Baym, Gordon, Beck, D. H., Geltenbort, Peter, and Shelton, Jessie. Mon . "Testing Dark Decays of Baryons in Neutron Stars". United States. doi:10.1103/PhysRevLett.121.061801.
@article{osti_1463059,
title = {Testing Dark Decays of Baryons in Neutron Stars},
author = {Baym, Gordon and Beck, D. H. and Geltenbort, Peter and Shelton, Jessie},
abstractNote = {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},
doi = {10.1103/PhysRevLett.121.061801},
journal = {Physical Review Letters},
number = 6,
volume = 121,
place = {United States},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevLett.121.061801

Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1. FIG. 1. : Baryon (or neutron) chemical potential (including rest mass) in MeV vs the baryon density in units of nuclear matter density, $n$0 = 0.16 fm−3, for the quark-hadron crossover equation of state, QHC18(0.8,1.5) [20], for the stiffer APR equation of state [21], and for noninteracting (free) neutrons. Thismore » figure shows how much more expensive it would be for a baryon to remain at high densities instead of turning into a weakly interacting dark matter particle with $m$$χ$ < $μ$$b$.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.