Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-03-31
Phys.Rev.D62:063515,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 1 figure
Scientific paper
10.1103/PhysRevD.62.063515
We propose a new scenario of baryogenesis in the context of theories with large extra dimensions. The baryon number is almost conserved at zero temperature by means of a localization mechanism recently analyzed by Arkani-Hamed and Schmaltz: leptons and quarks are located at two slightly displaced positions in the extra space, and this naturally suppresses the interactions which ``convert'' the latter in the former. We show that this is expected to be no longer true when finite temperature effects are taken into account. The whole scenario is first presented in its generality, without referring to the bulk geometry or to the specific mechanism which may generate the baryon asymmetry. As an example, we then focus on a baryogenesis model reminiscent of GUT baryogenesis. The Sakharov out of equilibrium condition is satisfied by assuming nonthermal production of the bosons that induce baryon number violation.
Masiero Antonio
Peloso Marco
Sorbo Lorenzo
Tabbash Rula
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