Baryon and lepton number transport in electroweak phase transition

Details Baryon and lepton number transport in electroweak phase transition Baryon and lepton number transport in electroweak phase transition

1994-05-25

arxiv.org/abs/hep-ph/9405378v1

Phys.Lett. B337 (1994) 122-127

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages + 2 figures available on request, HU-TFT-94-15, TURKU-FL-P11

Scientific paper

10.1016/0370-2693(94)91454-0

We consider the baryon number generation by charge transport mechanism in the electroweak phase transition taking properly into account thermal fluxes through the wall separating true and false vacuum in the spatial space. We show that the diffusion from the true vacuum to the false one has a large diminishing effect on the baryon number unless the wall velocity is near to, but less than, the speed of sound in the medium and the ratio between the collision rate and wall thickness is about 0.3. The maximum net baryon density generated is $\rho_B/s\simeq 0.2\times 10^{-10}$, where $s$ is the entropy density of the Universe. If the wall proceeds as a detonation, no baryon number is produced.

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