2025-07-14 カリフォルニア大学サンディエゴ校(UCSD)
Left Panel: When neutrinos scatter with themselves via standard model interactions the collapsing core of the massive star is relatively cold, and the neutrinos are mostly all electron flavor. In this scenario we may get a supernova explosion leaving, usually, a neutron star remnant.
＜関連情報＞
- https://today.ucsd.edu/story/secret-life-of-neutrinos
- https://journals.aps.org/prl/abstract/10.1103/gnp5-4y8k
ニュートリノ領域におけるレプトン数の非保存がコア崩壊型超新星爆発の可能性を変えるかもしれない Nonconservation of Lepton Numbers in the Neutrino Sector Could Change the Prospects for Core Collapse Supernova Explosions
Anna M. Suliga, Patrick Chi-Kit Cheong (張志杰), Julien Froustey, George M. Fuller, Lukáš Gráf, Kyle Kehrer, Oliver Scholer, and Shashank Shalgar
Physical Review Letters Published: 18 June, 2025
DOI: https://doi.org/10.1103/gnp5-4y8k
Abstract
We show that interactions violating the conservation of lepton numbers in the neutrino sector could significantly alter the standard low entropy picture for the presupernova collapsing core of a massive star. A rapid neutrino-antineutrino equilibration leads to entropy generation and enhanced electron capture and, hence, a lower electron fraction than in the standard model. This would affect the downstream core evolution, the prospects for a supernova explosion, and the emergent neutrino signal. If realized by lepton-number-violating neutrino self-interactions (LNV SI), the relevant mediator mass and coupling ranges can be probed by future accelerator-based experiments.
