Supernova 1987A

Branch, David; Wheeler, J. C.

doi:10.1007/978-3-662-55054-0_11

Cited by 1 publication

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“…In a typical supernova, about 10 58 neutrinos are released in a burst lasting tens of seconds. Although the first observation of supernova neutrinos by the Kamiokande-II [1], Baksan [2], and IMB [3] detectors in 1987 yielded a total of only two dozen events, the scientific impact of this dataset has been tremendous, leading to numerous publications on a wide variety of subjects [4][5][6][7][8][9]. In the years since first detection, a worldwide network of large neutrino experiments, most built primarily for other applications, stands ready to perform a second, high-statistics measurement if a core-collapse supernova should occur within our galaxy [10].…”

Section: Introductionmentioning

confidence: 99%

Nuclear de-excitations in low-energy charged-current $ν_e$ scattering on $^{40}$Ar

Gardiner

2020

Preprint

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Background: Large argon-based neutrino detectors, such as those planned for the Deep Underground Neutrino Experiment (DUNE), have the potential to provide unique sensitivity to low-energy (∼10 MeV) electron neutrinos produced by core-collapse supernovae. Despite their importance for neutrino energy reconstruction, nuclear deexcitations following charged-current νe 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 Ar(νe, e − ) 40 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 γ-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 γ-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 νe 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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Section: Introductionmentioning

confidence: 99%

Nuclear de-excitations in low-energy charged-current $ν_e$ scattering on $^{40}$Ar

Gardiner

2020

Preprint

View full text Add to dashboard Cite

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Supernova 1987A

Cited by 1 publication

References 144 publications

Nuclear de-excitations in low-energy charged-current $ν_e$ scattering on $^{40}$Ar

Nuclear de-excitations in low-energy charged-current $ν_e$ scattering on $^{40}$Ar

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