DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Dibaryons cannot be the dark matter

Abstract

The hypothetical SU(3) flavor-singlet dibaryon state S with strangeness –2 has been discussed as a dark-matter candidate capable of explaining the curious 5-to-1 ratio of the mass density of dark matter to that of baryons. We study the early-universe production of dibaryons and find that irrespective of the hadron abundances produced by the QCD quark/hadron transition, rapid particle reactions thermalized the S abundance, and it tracked equilibrium until it “froze out” at a tiny value. For the plausible range of dibaryon masses (1860–1890 MeV) and generous assumptions about its interaction cross sections, S’s account for at most 10–11 of the baryon number and, thus, cannot be the dark matter. Although it is not the dark matter, if the S exists, it might be an interesting relic.

Authors:
;
Publication Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1501725
Alternate Identifier(s):
OSTI ID: 1611253
Grant/Contract Number:  
FG02-13ER41958; SC0009924
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 99 Journal Issue: 6; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics; Dark matter; Hypothetical particle physics models; Particle dark matter

Citation Formats

Kolb, Edward W., and Turner, Michael S.. Dibaryons cannot be the dark matter. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.99.063519.
Kolb, Edward W., & Turner, Michael S.. Dibaryons cannot be the dark matter. United States. https://doi.org/10.1103/PhysRevD.99.063519
Kolb, Edward W., and Turner, Michael S.. Tue . "Dibaryons cannot be the dark matter". United States. https://doi.org/10.1103/PhysRevD.99.063519.
@article{osti_1501725,
title = {Dibaryons cannot be the dark matter},
author = {Kolb, Edward W. and Turner, Michael S.},
abstractNote = {The hypothetical SU(3) flavor-singlet dibaryon state S with strangeness –2 has been discussed as a dark-matter candidate capable of explaining the curious 5-to-1 ratio of the mass density of dark matter to that of baryons. We study the early-universe production of dibaryons and find that irrespective of the hadron abundances produced by the QCD quark/hadron transition, rapid particle reactions thermalized the S abundance, and it tracked equilibrium until it “froze out” at a tiny value. For the plausible range of dibaryon masses (1860–1890 MeV) and generous assumptions about its interaction cross sections, S’s account for at most 10–11 of the baryon number and, thus, cannot be the dark matter. Although it is not the dark matter, if the S exists, it might be an interesting relic.},
doi = {10.1103/PhysRevD.99.063519},
journal = {Physical Review D},
number = 6,
volume = 99,
place = {United States},
year = {2019},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevD.99.063519

Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Non-binding of flavor-singlet hadrons to nuclei
journal, May 2003


Erratum to: “Non-binding of flavor-singlet hadrons to nuclei”
journal, November 2003


Cosmic abundances of stable particles: Improved analysis
journal, August 1991


Observation of a H Λ Λ 6 e Double Hypernucleus
journal, November 2001


Most Strange Dibaryon from Lattice QCD
journal, May 2018


Perhaps a Stable Dihyperon
journal, March 1977


Nuclear and nucleon transitions of the H dibaryon
journal, July 2004


Six flavor quark matter
journal, June 2018


Deeply bound dibaryon is incompatible with neutron stars and supernovae
journal, February 2019


Perhaps a Stable Dihyperon
journal, January 1977


Bound H Dibaryon in Flavor SU(3) Limit of Lattice QCD
journal, April 2011


Dark matter in the standard model?
journal, September 2018


Why Should Baryons and Exotic Relic Particles have Comparable Densities?
journal, January 1987


Cosmic separation of phases
journal, July 1984


p p ,   p Λ , and Λ Λ correlations studied via femtoscopy in p p reactions at s = 7 TeV
journal, February 2019