skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Quark–gluon plasma as the possible source of cosmological dark radiation

Abstract

The effective number of neutrinos, N eff, obtained from CMB fluctuations accounts for all effectively massless degrees of freedom present in the Universe, including but not limited to the three known neutrinos. Using a lattice-QCD derived QGP equation of state, we constrain the observed range of N eff in terms of the freeze-out of unknown degrees of freedom near to quark–gluon hadronization. We explore limits on the coupling of these particles, applying methods of kinetic theory, and discuss the implications of a connection between N eff and the QGP transformation for laboratory studies of QGP.

Authors:
 [1];  [1]
  1. Univ. of Arizona, Tucson, AZ (United States)
Publication Date:
Research Org.:
Univ. of Arizona, Tucson, AZ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1197964
Alternate Identifier(s):
OSTI ID: 1193636
Grant/Contract Number:  
FG02-04ER41318
Resource Type:
Journal Article: Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 741; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Birrell, Jeremiah, and Rafelski, Johann. Quark–gluon plasma as the possible source of cosmological dark radiation. United States: N. p., 2015. Web. doi:10.1016/j.physletb.2014.12.033.
Birrell, Jeremiah, & Rafelski, Johann. Quark–gluon plasma as the possible source of cosmological dark radiation. United States. doi:10.1016/j.physletb.2014.12.033.
Birrell, Jeremiah, and Rafelski, Johann. Sun . "Quark–gluon plasma as the possible source of cosmological dark radiation". United States. doi:10.1016/j.physletb.2014.12.033.
@article{osti_1197964,
title = {Quark–gluon plasma as the possible source of cosmological dark radiation},
author = {Birrell, Jeremiah and Rafelski, Johann},
abstractNote = {The effective number of neutrinos, Neff, obtained from CMB fluctuations accounts for all effectively massless degrees of freedom present in the Universe, including but not limited to the three known neutrinos. Using a lattice-QCD derived QGP equation of state, we constrain the observed range of Neff in terms of the freeze-out of unknown degrees of freedom near to quark–gluon hadronization. We explore limits on the coupling of these particles, applying methods of kinetic theory, and discuss the implications of a connection between Neff and the QGP transformation for laboratory studies of QGP.},
doi = {10.1016/j.physletb.2014.12.033},
journal = {Physics Letters. Section B},
number = C,
volume = 741,
place = {United States},
year = {Sun Feb 01 00:00:00 EST 2015},
month = {Sun Feb 01 00:00:00 EST 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.physletb.2014.12.033

Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

Save / Share: