Baryon number non-conservation and phase transitions at preheating

Details Baryon number non-conservation and phase transitions at preheating Baryon number non-conservation and phase transitions at preheating

2000-01-07

arxiv.org/abs/hep-ph/0001058v2

Phys.Rev. D61 (2000) 103510

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 7 figures included, revtex, epsf, references added

Scientific paper

10.1103/PhysRevD.61.103510

Certain inflation models undergo pre-heating, in which inflaton oscillations can drive parametric resonance instabilities. We discuss several phenomena stemming from such instabilities, especially in weak-scale models; generically, these involve energizing a resonant system so that it can evade tunneling by crossing barriers classically. One possibility is a spontaneous change of phase from a lower-energy vacuum state to one of higher energy, as exemplified by an asymmetric double-well potential with different masses in each well. If the lower well is in resonance with oscillations of the potential, a system can be driven resonantly to the upper well and stay there (except for tunneling) if the upper well is not resonant. Another example occurs in hybrid inflation models where the Higgs field is resonant; the Higgs oscillations can be transferred to electroweak (EW) gauge potentials, leading to rapid transitions over sphaleron barriers and consequent B+L violation. Given an appropriate CP-violating seed, we find that preheating can drive a time-varying condensate of Chern-Simons number over large spatial scales; this condensate evolves by oscillation as well as decay into modes with shorter spatial gradients, eventually ending up as a condensate of sphalerons. We study these examples numerically and to some extent analytically. The emphasis in the present paper is on the generic mechanisms, and not on specific preheating models; these will be discussed in a later paper.

Affiliated with

Also associated with

No associations

Rating

Baryon number non-conservation and phase transitions at preheating 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 Baryon number non-conservation and phase transitions at preheating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Baryon number non-conservation and phase transitions at preheating will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-186458