On the magnitude of baryon-to-photon ratio inhomogeneities resulting from a first-order quark-hadron transition

Details On the magnitude of baryon-to-photon ratio inhomogeneities resulting from a first-order quark-hadron transition On the magnitude of baryon-to-photon ratio inhomogeneities resulting from a first-order quark-hadron transition

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvd..37.3049t&link_type=abstract

Physical Review D (Particles and Fields), Volume 37, Issue 10, 15 May 1988, pp.3049-3051

Physics

11

Particle-Theory And Field-Theory Models Of The Early Universe, Lattice Qcd Calculations, Quark-Gluon Plasma, Origin, Formation, And Abundances Of The Elements

Scientific paper

We show that consideration of the low-lying baryon states in addition to the neutron and proton (specifically, the Λ, Σ, and Δ states) reduces the ratio of baryon-number density in the quark phase to that in the hadronic phase by more than a factor of 2. This implies that inhomogeneities in the local baryon-number-to-photon ratio produced during the quark-hadron transition are likely to be smaller than previous estimates, and therefore unless the transition temperature is less than ~150 MeV, the effects upon primordial nucleosynthesis will not be significant.

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