Forbidden transitions in neutral and charged current interactions between low-energy neutrinos and Argon

Abstract

Background: The study of low-energy neutrinos and their interactions with atomic nuclei is crucial to several open problems in physics, including the neutrino mass hierarchy, CP-violation, candidates of Beyond Standard Model physics and supernova dynamics. Examples of experiments include CAPTAIN at SNS as well as DUNE's planned detection program of supernova neutrinos. Purpose: We present cross section calculations for quasielastic charged current and neutral current neutrinos at low energies, with a focus on ${}^{40}$Ar. We also take a close look at pion decay-at-rest neutrino spectra, which are used in e.g. the SNS experiment at Oakridge. Method and results: We employ a Hartree Fock + Continuum Random Phase Approximations (HF+CRPA) framework, which allows us to model the responses and include the effects of long-range correlations. It is expected to provide a good framework to calculate forbidden transitions, whose contribution which we show to be non-negligible. Conclusions: Forbidden transitions can be expected to contribute sizeably to the reaction strength at typical low-energy kinematics, such as DAR neutrinos. Modeling and Monte Carlo simulations need to take all due care to account for the influence of their contributions.

arXiv comment11 pages, 16 figures; minor corrections to v2

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Cited by in corpus (12)

• Nuclear de-excitations in low-energy charged-current ${\nu }_e$ scattering on ${}^{40}$Ar
• Modeling quasielastic interactions of monoenergetic kaon decay-at-rest neutrinos
• Lepton kinematics in low energy neutrino-Argon interactions
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