arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1002.2943hep-phastro-ph.SR
收藏

中微子质量等级和超新星中微子的三味谱分裂

Neutrino mass hierarchy and three-flavor spectral splits of supernova neutrinos

Basudeb Dasgupta, Alessandro Mirizzi, Irene Tamborra, Ricard Tomas

摘要:

最近人们意识到,三味效应可以特别地修改由集体振荡引起的光谱分裂的发展,对于在质子中子星冷却阶段发射的超新星中微子。我们系统地探讨这种情况下,解释如何影响这些三味效应取决于中微子质量的排序。在倒置的质量等级中,太阳质量分裂引起(反)中微子能谱区域的不稳定性,而这些区域在由大气质量分裂和1-3混合角控制的主导双味演化下是稳定的。结果,在电子(反)中微子光谱中发现的高能光谱分裂消失了,并转移到其他口味。不完美的绝热性导致光谱交换特征的拖尾。在正常的质量等级中,三味和双味不稳定性作用在中微子能谱的同一区域,导致只有轻微偏离双味处理。

英文摘要:

It was recently realized that three-flavor effects could peculiarly modify the development of spectral splits induced by collective oscillations, for supernova neutrinos emitted during the cooling phase of a protoneutron star. We systematically explore this case, explaining how the impact of these three-flavor effects depends on the ordering of the neutrino masses. In inverted mass hierarchy, the solar mass splitting gives rise to instabilities in regions of the (anti)neutrino energy spectra that were otherwise stable under the leading two-flavor evolution governed by the atmospheric mass splitting and by the 1-3 mixing angle. As a consequence, the high-energy spectral splits found in the electron (anti)neutrino spectra disappear, and are transferred to other flavors. Imperfect adiabaticity leads to smearing of spectral swap features. In normal mass hierarchy, the three-flavor and the two-flavor instabilities act in the same region of the neutrino energy spectrum, leading to only minor departures from the two-flavor treatment.

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。

↑