The Sphaleron in a Magnetic Field and Electroweak Baryogenesis

Details The Sphaleron in a Magnetic Field and Electroweak Baryogenesis The Sphaleron in a Magnetic Field and Electroweak Baryogenesis

1999-03-02

arxiv.org/abs/hep-ph/9903227v1

Phys.Lett. B458 (1999) 304-309

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures

Scientific paper

10.1016/S0370-2693(99)00381-0

The presence of a primordial magnetic field in the early universe affects the dynamic of the electroweak phase transition enhancing its strength. This effect may enlarge the window for electroweak baryogenesis in the minimal supersymmetric extension of the standard model or even resurrect the electroweak baryogenesis scenario in the standard model. We compute the sphaleron energy in the background of the magnetic field and show that, due to the sphaleron dipole moment, the barrier between topologically inequivalent vacua is lowered. Therefore, the preservation of the baryon asymmetry calls for a much stronger phase transition than required in the absence of a magnetic field. We show that this effect overwhelms the gain in the phase transition strength, and conclude that magnetic fields do not help electroweak baryogenesis.

Affiliated with

Also associated with

No associations

Rating

The Sphaleron in a Magnetic Field and Electroweak Baryogenesis 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 The Sphaleron in a Magnetic Field and Electroweak Baryogenesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Sphaleron in a Magnetic Field and Electroweak Baryogenesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-290588