Quark–gluon plasma as the possible source of cosmological dark radiation
Journal Article
·
· Physics Letters B
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.
- Research Organization:
- Univ. of Arizona, Tucson, AZ (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- FG02-04ER41318
- OSTI ID:
- 1197964
- Alternate ID(s):
- OSTI ID: 1193636
- Journal Information:
- Physics Letters B, Journal Name: Physics Letters B Vol. 741 Journal Issue: C; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
Cited by: 5 works
Citation information provided by
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