arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.1830hep-phastro-phhep-ex
收藏

超新星中微子流的自感光谱分裂

Self-induced spectral splits in supernova neutrino fluxes

Georg G. Raffelt, Alexei Yu. Smirnov

摘要:

在超新星中微子球上方的密中微子区(r > 400 km),中微子-中微子折射会引起集体的味道转变。它们可以导致“光谱分裂”,其中能量E_分裂将变换的光谱急剧分裂成几乎纯但不同风味的部分。除非在密中微子区存在普通的MSW共振,否则E_split仅由味轻子数守恒决定。光谱分裂是由大中微子密度区和小中微子密度区之间的绝热跃迁产生的。我们明确地解决了绝热极限的运动方程,并提供了一个通用的例子的解析表达式。

英文摘要:

In the dense-neutrino region above the neutrino sphere of a supernova (r > 400 km), neutrino-neutrino refraction causes collective flavor transformations. They can lead to "spectral splits" where an energy E_split splits the transformed spectrum sharply into parts of almost pure but different flavors. Unless there is an ordinary MSW resonance in the dense-neutrino region, E_split is determined by flavor-lepton number conservation alone. Spectral splits are created by an adiabatic transition between regions of large and small neutrino density. We solve the equations of motion in the adiabatic limit explicitly and provide analytic expressions for a generic example.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑