skip to main content

DOE PAGESDOE PAGES

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

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