Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Leptogenesis in Theories with Large Extra Dimensions   We study the scenario of baryogenesis through leptogenesis in
higher-dimensional theories, in which the scale of quantum gravity is many
orders of magnitude smaller than the usual Planck mass. The minimal realization
of these theories includes an isosinglet neutrino which feels the presence of
large compact dimensions, whereas all the SM particles are localized on a
$(1+3)$-dimensional subspace. In the formulation of minimal leptogenesis
models, we pay particular attention to the existence of Majorana spinors in
higher dimensions. After compactification of the extra dimensions, we obtain a
tower of Majorana Kaluza-Klein excitations which act as an infinite series of
CP-violating resonators, and derive the necessary conditions for their
constructive interference. Based on this CP-violating mechanism, we find that
the decays of the heavy Majorana excitations can produce a leptonic asymmetry
which is reprocessed into the observed baryonic asymmetry of the Universe by
means of out-of-equilibrium sphaleron interactions, provided the reheat
temperature is above 5 GeV.

21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs