Speaker
Description
In core-collapse supernova explosions, the energy transfer from neutrinos to matter (neutrino heating) is considered a key ingredient of the explosion mechanism. However, even after taking into account multidimensional hydrodynamics, magnetic fields, turbulence, and realistic nuclear equations of state, reproducing robust explosions over a wide range of progenitors remains challenging.
Janka and Müller showed that even a modest increase in neutrino heating efficiency can significantly enhance the explosion energy [1]. This suggests that relatively small corrections to neutrino energy deposition may have important consequences for the explosion dynamics. In our previous study, we investigated the energy and momentum transfer through elastic neutrino scattering with nucleons, nuclei, electrons, and bulk nuclear matter, and suggested that these processes may provide an additional heating source of the magnitude required for successful explosions [2].
In the present study, the recoil-induced energy transfer is reevaluated systematically using the dynamic structure factor of the medium. Quantitative contributions from coherent elastic neutrino–nucleus scattering (CEvNS), neutrino–electron scattering, and other elastic scattering processes to neutrino heating will be discussed.
[1] H.-T. Janka and E. Müller, Astron. Astrophys. 306 (1996) 167–198.
[2] T. Shima, Phys. Lett. B872 (2026) 140135
| Category | Theory |
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