Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Baryogenesis from Hierarchical Dirac Neutrinos   We present here a novel and testable mechanism for leptogenesis, which is
characterized by a purely thermal generation of lepton asymmetry via scalar
decay. Guided by the thermal mass matrix diagonalization in the
finite-temperature regime, we propose a scenario in which the baryon asymmetry
is formulated in terms of the masses and mixing from hierarchical Dirac
neutrinos, as well as a vacuum scale accountable for the sub-eV neutrino
masses. This allows a natural and direct link between the high-scale
\textit{CP} asymmetry and the low-energy Dirac \textit{CP}-violating phase
without involved model structures, and thus circumvents the haunting problem
encountered in general leptogenesis scenarios. The mechanism can also be
applied as a prototype for solving the baryon asymmetry problem to a broad
class of well-motivated model buildings.

3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int