Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear de-excitations in low-energy charged-current $\nu_e$ scattering
  on $^{40}$Ar   Background: Large argon-based neutrino detectors, such as those planned for
the Deep Underground Neutrino Experiment, have the potential to provide unique
sensitivity to low-energy (few to tens of MeV) electron neutrinos produced by
core-collapse supernovae. Despite their importance for neutrino energy
reconstruction, nuclear de-excitations following charged-current $\nu_e$
absorption on $^{40}$Ar have never been studied in detail at supernova
energies.
  Purpose: I develop a model of nuclear de-excitations that occur following the
$^{40}\mathrm{Ar}(\nu_e,e^{-})^{40}\mathrm{K}^*$ reaction. This model is
applied to the calculation of exclusive cross sections.
  Methods: A simple expression for the inclusive differential cross section is
derived under the allowed approximation. Nuclear de-excitations are described
using a combination of measured $\gamma$-ray decay schemes and the
Hauser-Feshbach statistical model. All calculations are carried out using a
novel Monte Carlo event generator called MARLEY (Model of Argon Reaction Low
Energy Yields).
  Results: Various total and differential cross sections are presented. Two
de-excitation modes, one involving only $\gamma$-rays and the other including
single neutron emission, are found to be dominant at few tens-of-MeV energies.
  Conclusions: Nuclear de-excitations have a strong impact on the achievable
energy resolution for supernova $\nu_e$ detection in liquid argon. Tagging
events involving neutron emission, though difficult, could substantially
improve energy reconstruction. Given a suitable calculation of the inclusive
cross section, the MARLEY nuclear de-excitation model may readily be applied to
other scattering processes.

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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: q-fin