Sneutrino condensate source for density perturbations, leptogenesis and low reheat temperature

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dc.creatorMazumdar, Anupam
dc.creatorPérez-Lorenzana, A.
dc.date2003-11-08
dc.date2004-05-16
dc.date.accessioned2026-07-07T11:09:27Z
dc.date.available2026-07-07T11:09:27Z
dc.descriptionWe bring together some known ingredients beyond the Standard Model physics which can explain the hot Big Bang model with the observed baryon asymmetry and also the fluctuations in the cosmic microwave background radiation with a minimal set of assumptions. We propose an interesting scenario where the inflaton energy density is dumped into an infinitely large extra dimension. Instead of the inflaton it is the right handed sneutrino condensate, which is acquiring non-zero vacuum expectation value during inflation, whose fluctuations are responsible for the density perturbations seen in the cosmic microwave background radiation with a spectral index $n_s\approx 1$. The decay of the condensate is explaining the reheating of the Universe with a temperature, $T_{rh}\leq 10^{9}$ GeV, and the baryon asymmetry of order one part in $10^{10}$ with no baryon-isocurvature fluctuations.
dc.description4 pages, Title has been modified, trivial changes to match accepted version in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/hep-ph/0311106
dc.identifierhttp://arxiv.org/abs/hep-ph/0311106
dc.identifierPhys.Rev.Lett.92:251301,2004
dc.identifierdoi:10.1103/PhysRevLett.92.251301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190474
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleSneutrino condensate source for density perturbations, leptogenesis and low reheat temperature
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