Shell-model computed cross sections for charged-current scattering of astrophysical neutrinos off 40Ar
Kostensalo, J., Suhonen, J., & Zuber, K. (2018). Shell-model computed cross sections for charged-current scattering of astrophysical neutrinos off 40Ar. Physical Review C, 97 (3), 034309. doi:10.1103/PhysRevC.97.034309
Julkaistu sarjassaPhysical Review C
© 2018 American Physical Society. Published in this repository with the kind permission of the publisher.
Charged-current (anti)neutrino- 40 Ar cross sections for astrophysical neutrinos have been calculated. The initial and final nuclear states were calculated using the nuclear shell model. The folded solar-neutrino scattering cross section was found to be 1.78 ( 23 ) × 10 − 42 cm 2 , which is higher than what the previous papers have reported. The contributions from the 1 − and 2 − multipoles were found to be significant at supernova-neutrino energies, confirming the random-phase approximation (RPA) result of a previous study. The effects of neutrino flavor conversions in dense stellar matter (matter oscillations) were found to enhance the neutrino-scattering cross sections significantly for both the normal and inverted mass hierarchies. For the antineutrino scattering, only a small difference between the nonoscillating and inverted-hierarchy cross sections was found, while the normal-hierarchy cross section was 2–3 times larger than that of the nonoscillating cross section, depending on the adopted parametrization of the Fermi-Dirac distribution. This property of the supernova-antineutrino signal could probably be used to distinguish between the two hierarchies in megaton LAr detectors. ...