Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-06-26
Astropart.Phys.4:293-308,1996
Physics
High Energy Physics
High Energy Physics - Phenomenology
Two figures: fig1.metafile and fig2.metafile. Just print them as usual file.ps
Scientific paper
10.1016/0927-6505(95)00047-X
We investigate the role played by subcritical bubbles at the onset of the electroweak phase transition. Treating the configuration modelling the thermal fluctuations around the homogeneous zero configuration of the Higgs field as a stochastic variable, we describe its dynamics by a phenomenological Langevin equation. This approach allows to properly take into account both the effects of the thermal bath on the system: a systematic dyssipative force, which tends to erase out any initial subcritical configuration, and a random stochastic force responsible for the fluctuations. We show that the contribution to the variance $\lgh\phi^2(t)\rg_V$ in a given volume $V$ from any initial subcritical configuration is quickly damped away and that, in the limit of long times, $\lgh\phi^2(t)\rg_V$ approaches its equilibrium value provided by the stochastic force and independent from the viscosity coefficient, as predicted by the fluctuation-dissipation theorem. In agreement with some recent claims, we conclude that thermal fluctuations do not affect the nucleation of critical bubbles at the onset of the electroweak phase transition making electroweak baryogenesis scenarios still a viable possibility to explain the primordial baryon asymmetry in the Universe.
Illuminati Fabrizio
Riotto Antonio
No associations
LandOfFree
A Stochastic Approach to Thermal Fluctuations during a First Order Electroweak Phase Transition does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Stochastic Approach to Thermal Fluctuations during a First Order Electroweak Phase Transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Stochastic Approach to Thermal Fluctuations during a First Order Electroweak Phase Transition will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-393349