Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: R-parity Violating Right-Handed Neutrino in Gravitino Dark Matter
  Scenario   A decay of the gravitino dark matter is an attractive candidate to explain
the current excesses of the PAMELA/ATIC cosmic-ray data. However, R-parity
violations are required to be very tiny in low-energy scale. We suggest a
R-parity violation in the right-handed neutrino sector. The violation is
suppressed by a see-saw mechanism. Although a reheating temperature is
constrained from above, the thermal leptogenesis is found to work successfully
with a help of the R-parity violating right-handed neutrino.

3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom