47 citations · 53 across the 4 of their papers we have counts for
4 papers
Lepton Number and Expansion of the Universe
Cheng Tao Yang, Jeremiah Birrell, Johann Rafelski
We show that the non-integer effective number of neutrinos can be understood as an effect of lepton asymmetry in the early Universe carried by the Dirac ne…
Non-Equilibrium Aspects of Relic Neutrinos: From Freeze-out to the Present Day
Jeremiah Birrell
In this dissertation, we study the evolution and properties of the relic (or cosmic) neutrino distribution from neutrino freeze-out at MeV through the free-streaming era u…
Relic Neutrino Freeze-out: Dependence on Natural Constants
Jeremiah Birrell, Cheng-Tao Yang, Johann Rafelski
Analysis of cosmic microwave background radiation fluctuations favors an effective number of neutrinos, . This motivates a reinvestigation of the neutrino freeze-out process…
Possibility of Electroweak Phase Transition at Low Temperature
Jeremiah Birrell, Johann Rafelski
We study models of strong first order `low' temperature electroweak phase transition. To achieve this we propose a class of Higgs effective potential models which preserve the know…