Diffuse neutrino background from magnetorotational stellar core collapses
Year: 2024
Type: article
Abstract: A statistically significant detection of the diffuse supernova neutrino background (DSNB) is around the corner. To this purpose, we assess the contribution to the DSNB of magnetorotational collapses of massive stars, relying on a suite of state-of-the-art three-dimensional neutrino-magnetohydrodynamic simulations. We find that neutrinos from magnetorotational core collapses boost the high-energy tail of the DSNB spectrum, similar to what is expected from neutrino-driven black hole-forming collapses. The latest data from the Super-Kamiokande Collaboration can already exclude that more than 13% of all collapsing massive stars undergo magnetorotational collapses under optimistic assumptions. A DSNB detection at $3\ensuremath{\sigma}$ could take place up to 4 yr earlier at Super-Kamiokande-Gadolinium or JUNO if the fraction of magnetorotational collapses should be larger than 10%. Fascinatingly, if the fraction of magnetorotational stellar collapses should be larger than 19% (13%), Hyper-Kamiokande could measure such a fraction at $3\ensuremath{\sigma}$ after (10 yr) 20 yr of DSNB data taking. The combination of DSNB and electromagnetic data has the potential to resolve the degenerate contributions from magnetorotational and neutrino-driven black hole-forming collapses, providing crucial insight on the properties of the population of collapsing massive stars.
Institutions: University of Copenhagen, Universitat de València
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, Aspen Center for Physics, Villum Fonden, European Commission, Deutsche Forschungsgemeinschaft, Københavns Universitet, Carlsbergfondet, Generalitat Valenciana, Universitat de València, Danmarks Frie Forskningsfond, Barcelona Supercomputing Center, Agencia Estatal de Investigación, High Energy Physics, European Social Fund, NextGenerationEU
Awards: G1047231290, G1175115578, G120905174, G1272927172, G1422035950, G1530851820, G210041235, G2262748287, G2478736931, G2595738051, G2601397997, G2723795428, G300979063, G34346518, G3480869486, G357246561, G3657264681, G3681454997, G3862154466, G3973965102, G4042783231, G4090823411, G425668148, G4442677895, G4526231891, G4733308909, G4935651347, G4994891542, G5080475149, G531036588, G5929851543, G6218905885, G6238473090, G7084143925, G7434936867, Programs on Critical Problems in Physics, Astrophysics and Biophysics at the Aspen Center for Physics, G792975244, G8471505197, G952626980, G957857756
OpenAlex ID: W4404567644