On preserving a B + L asymmetry produced in the early universe
نویسندگان
چکیده
منابع مشابه
On Preserving a B + L Asymmetry Produced in the Early Universe
One of the most efficient mechanisms for producing the baryon asymmetry of the Universe is the decay of scalar condensates in a SUSY GUT as was first suggested by Affleck and Dine. We show that given a large enough asymmetry, the baryon number will be preserved down to low temperatures even if B − L = 0, because the baryon number carrying scalars form bose condensates that give the W a mass. We...
متن کاملNeutrino-antineutrino Asymmetry in the Early Universe
In this talk I discuss the use of a relic neutrino-antineutrino asymmetry in suppressing active-sterile neutrino oscillations in the early universe. This phenomenon can serve to greatly loosen the well known Big Bang Nucleosynthesis constraints on active-sterile neutrino mixing, and is thus important in some proposed solutions to the solar and atmospheric neutrino anomalies which employ large-a...
متن کاملLepton asymmetry creation in the Early Universe
Oscillations of active to sterile neutrinos with a small mixing angle sin 2θ < 10 −2 could generate a large lepton asymmetry in the Early Universe. The final order of magnitude of the lepton asymmetry η is mainly determined by its growth in the last stage of evolution, the so called power-law regime. There exist two contradictory results in the literature, η ∝ T −1 and η ∝ T −4 , where T is the...
متن کاملOscillation induced neutrino asymmetry growth in the early Universe
We study the dynamics of active-sterile neutrino oscillations in the early universe using full momentum-dependent quantum-kinetic equations. These equations are too complicated to allow for an analytical treatment, and numerical solution is greatly complicated due to very pronounced and narrow structures in the momentum variable introduced by resonances. Here we introduce a novel dynamical disc...
متن کاملEntropy of Gravitons Produced in the Early Universe
Gravitons produced from quantum vacuum fluctuations during an inflationary stage in the early Universe have zero entropy as far as they reflect the time evolution (squeezing) of a pure state, their large occupation number notwithstanding. A non-zero entropy of the gravitons (classical gravitational waves (GW) after decoherence) can be obtained through coarse graining. The latter has to be physi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 1994
ISSN: 0370-2693
DOI: 10.1016/0370-2693(94)91490-7