10 papers · 1 filter
Neutrino energy loss rate in a stellar plasma
S. Esposito, G. Mangano, G. Miele +2
We review the purely leptonic neutrino emission processes, contributing to the energy loss rate of the stellar plasma. We perform a complete analysis up to the first order in the e…
Radiative corrections to neutrino energy loss rate in stellar interiors
S. Esposito, G. Mangano, G. Miele +2
We consider radiative electromagnetic corrections, at order α, to the process at finite density and temperature. This process represents one of the main contri…
Early-universe constraints on a time-varying fine structure constant
P. P. Avelino, S. Esposito, G. Mangano +6
Higher-dimensional theories have the remarkable feature of predicting a time (and hence redshift) dependence of the `fundamental' four dimensional constants on cosmological timesca…
Testing Standard and Degenerate Big Bang Nucleosynthesis with BOOMERanG and MAXIMA-1
S. Esposito, G. Mangano, A. Melchiorri +2
We test different Big Bang Nucleosynthesis scenarios using the recent results on the Cosmic Microwave Background Anisotropies provided by the BOOMERanG and MAXIMA-1 experiments ver…
Non equilibrium spectra of degenerate relic neutrinos
S. Esposito, G. Miele, S. Pastor +2
We calculate the exact kinetic evolution of cosmic neutrinos until complete decoupling, in the case when a large neutrino asymmetry exists. While not excluded by present observatio…
The standard and degenerate primordial nucleosynthesis versus recent experimental data
S. Esposito, G. Mangano, G. Miele +1
We report the results on Big Bang Nucleosynthesis (BBN) based on an updated code, with accuracy of the order of 0.1% on He4 abundance, compared with the predictions of other recent…