BBN deuterium abundances exclude baryon-to-photon inhomogeneities above roughly 26-28% RMS, probing physics at temperatures up to a few TeV.
On Constraining Electroweak-Baryogenesis with Inhomogeneous Primordial Nucleosynthesis
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Primordial nucleosynthesis calculations are shown to be able to provide constraints on electroweak baryogenesis which produce a highly inhomogeneous distribution of the baryon-to-photon ratio. Such baryogenesis scenarios overproduce 4He and/or 7Li and can be ruled out whenever a fraction f<3*10e-6(100 GeV/T)^3 of nucleated bubbles of broken-symmetry phase contributes > 10% of the baryon number within the horizon volume.
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The Bearable Inhomogeneity of the Baryon Asymmetry
BBN deuterium abundances exclude baryon-to-photon inhomogeneities above roughly 26-28% RMS, probing physics at temperatures up to a few TeV.