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Title: Deeply bound dibaryon is incompatible with neutron stars and supernovae

Abstract

We study the effect of a dibaryon S in the mass range 1860 < m S < 2054 MeV, which is heavy enough not to disturb the stability of nuclei and light enough to possibly be cosmologically metastable. Such a deeply bound state can act as a baryon sink in regions of high baryon density and temperature. We find that the ambient conditions encountered inside a newly born neutron star are likely to sustain a sufficient population of hyperons to ensure that a population of S dibaryons can equilibrate in less than a few seconds. This would be catastrophic for the stability of neutron stars and the observation of neutrino emission from the proto-neutron star of Supernova 1987A over ~O(10) s. As a result, a deeply bound dibaryon is therefore incompatible with the observed supernova explosion, unless the cross section for S production is severely suppressed.

Authors:
 [1];  [2];  [2]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Univ. of Washington, Seattle, WA (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1494378
Alternate Identifier(s):
OSTI ID: 1495366
Report Number(s):
arXiv:1809.06765; FERMILAB-PUB-18-490-A
Journal ID: ISSN 2470-0010; PRVDAQ; 1694470
Grant/Contract Number:  
AC02-07CH11359; FG02-00ER41132
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 99; Journal Issue: 3; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

McDermott, Samuel D., Reddy, Sanjay, and Sen, Srimoyee. Deeply bound dibaryon is incompatible with neutron stars and supernovae. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.99.035013.
McDermott, Samuel D., Reddy, Sanjay, & Sen, Srimoyee. Deeply bound dibaryon is incompatible with neutron stars and supernovae. United States. doi:10.1103/PhysRevD.99.035013.
McDermott, Samuel D., Reddy, Sanjay, and Sen, Srimoyee. Tue . "Deeply bound dibaryon is incompatible with neutron stars and supernovae". United States. doi:10.1103/PhysRevD.99.035013.
@article{osti_1494378,
title = {Deeply bound dibaryon is incompatible with neutron stars and supernovae},
author = {McDermott, Samuel D. and Reddy, Sanjay and Sen, Srimoyee},
abstractNote = {We study the effect of a dibaryon S in the mass range 1860 < mS < 2054 MeV, which is heavy enough not to disturb the stability of nuclei and light enough to possibly be cosmologically metastable. Such a deeply bound state can act as a baryon sink in regions of high baryon density and temperature. We find that the ambient conditions encountered inside a newly born neutron star are likely to sustain a sufficient population of hyperons to ensure that a population of S dibaryons can equilibrate in less than a few seconds. This would be catastrophic for the stability of neutron stars and the observation of neutrino emission from the proto-neutron star of Supernova 1987A over ~O(10) s. As a result, a deeply bound dibaryon is therefore incompatible with the observed supernova explosion, unless the cross section for S production is severely suppressed.},
doi = {10.1103/PhysRevD.99.035013},
journal = {Physical Review D},
issn = {2470-0010},
number = 3,
volume = 99,
place = {United States},
year = {2019},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.99.035013

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