Production of Free Quarks in the Early Universe

Wagoner, Robert V.; Steigman, Gary

doi:10.1103/PhysRevD.20.825

Production of Free Quarks in the Early Universe

Robert V. Wagoner
(
- Stanford U., ITP
)
,
Gary Steigman
(
- Stanford U., Inst. Plasma Physics and
- SLAC
)

Apr, 1979

15 pages

Published in:

Phys.Rev.D 20 (1979) 825

DOI:

10.1103/PhysRevD.20.825

Report number:

ITP-633-STANFORD

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Abstract: (APS)

A model of the q−q¯ interaction which avoids complete confinement is employed to calculate the number of free quarks which survive from the early universe. For a free-quark mass M≲10 GeV, our results are similar to those of previous calculations. But for M≳10 GeV, the number per nucleon is given by ln(qN)=ln(q¯N)=−MkT*+2ln(MkT*)+C, where the constant C≃20. Quarks of such mass freeze out of equilibrium during the quark-hadron transition at a temperature 0.2≲T*≲0.4 GeV/k, which for instance predicts 15≲M≲30 GeV if (q+q¯)N∼10−20.

ASTROPHYSICS
QUARK: PRODUCTION
PRODUCTION: QUARK
QUARK ANTIQUARK: INTERACTION
INTERACTION: QUARK ANTIQUARK
QUARK: CONFINEMENT
QUARK: MASS
MASS: QUARK
THERMODYNAMICS
NUMERICAL CALCULATIONS

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