Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Right-handed neutrino production rate at T > 160 GeV   The production rate of right-handed neutrinos from a Standard Model plasma at
a temperature above a hundred GeV has previously been evaluated up to NLO in
Standard Model couplings (g ~ 2/3) in relativistic (M ~ pi T) and
non-relativistic regimes (M >> pi T), and up to LO in an ultrarelativistic
regime (M < gT). The last result necessitates an all-orders resummation of the
loop expansion, accounting for multiple soft scatterings of the nearly
light-like particles participating in 1 <-> 2 reactions. In this paper we
suggest how the regimes can be interpolated into a result applicable for any
right-handed neutrino mass and at all temperatures above 160 GeV. The results
can also be used for determining the lepton number washout rate in models
containing right-handed neutrinos. Numerical results are given in a tabulated
form permitting for their incorporation into leptogenesis codes. We note that
due to effects from soft Higgs bosons there is a narrow intermediate regime
around M ~ g^{1/2} T in which our interpolation is phenomenological and a more
precise study would be welcome.

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The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
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The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga