Models of baryogenesis via spontaneous Lorentz violation
Oct, 2005
25 pages
Published in:
- Phys.Rev.D 73 (2006) 103515
e-Print:
- hep-ph/0510081 [hep-ph]
Report number:
- EFI-2005-17
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Abstract:
In the presence of background fields that spontaneously violate Lorentz invariance, a matter-antimatter asymmetry can be generated even in thermal equilibrium. In this paper we systematically investigate models of this type, showing that either high-energy or electroweak versions of baryogenesis are possible, depending on the dynamics of the Lorentz-violating fields. In addition to the previously-studied models of spontaneous baryogenesis and quintessential baryogenesis, we identify two scenarios of interest: baryogenesis from a pseudo-Nambu-Goldstone boson with weak-scale mass and intermediate-scale baryon-number violation, and sphaleron-induced baryogenesis driven by a constant-magnitude vector with a late-time phase transition.- 98.80.Cq
- baryon: production
- baryon: asymmetry
- violation: Lorentz
- spontaneous symmetry breaking
- background field: vector
- baryon number: violation
- Goldstone particle
- sphaleron: effect
- critical phenomena
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