Deeply bound dibaryon is incompatible with neutron stars and supernovae

McDermott, Samuel D.; Reddy, Sanjay; Sen, Srimoyee

doi:10.1103/PhysRevD.99.035013

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

Journal Article · Tue Feb 12 00:00:00 EST 2019 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.99.035013· OSTI ID:1494378

McDermott, Samuel D.; Reddy, Sanjay; Sen, Srimoyee

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.

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Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359; FG02-00ER41132

OSTI ID:: 1494378

Alternate ID(s):: OSTI ID: 1495366

Report Number(s):: arXiv:1809.06765; FERMILAB-PUB-18-490-A; PRVDAQ; 035013

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 99 Journal Issue: 3; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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