论文标题
弥漫性超新星中微子背景的三角形
Flavor Triangle of the Diffuse Supernova Neutrino Background
论文作者
论文摘要
尽管银河系循环超新星（SNE）每一世纪仅发生几次，但每个小时都会在整个宇宙中发生大量爆炸，以中微子的形式发出能量，从而导致弥漫性超新星中微子背景（DSNB）。尚未检测到DSNB，但预计用Gadolinium掺杂的Super-Kamiokande将在未来几年内产生第一个具有统计学意义的观察结果。由于在核心崩溃时产生的中微子在传播到地球期间会经历混合，因此检测时的风味含量是振荡物理学的测试。在本文中，我们估计了沙丘，Hyper-K和Juno实验中预期的DSNB数据，这些数据在组合时对所有不同的中微子口味敏感。对于Mikheyev-Smirnov-Wolfenstein（MSW）场景以及中微子decay的情况，我们确定了DSNB的风味含量将来会重建的效果。将排除很大一部分风味空间，但是重型莱普顿中微子通量仍然是一个挑战。
Although Galactic core-collapse supernovae (SNe) only happen a few times per century, every hour a vast number of explosions happen in the whole universe, emitting energy in the form of neutrinos, resulting in the diffuse supernova neutrino background (DSNB). The DSNB has not yet been detected, but Super-Kamiokande doped with gadolinium is expected to yield the first statistically significant observation within the next several years. Since the neutrinos produced at the core collapse undergo mixing during their propagation to Earth, the flavor content at detection is a test of oscillation physics. In this paper, we estimate the expected DSNB data at the DUNE, Hyper-K and JUNO experiments which when combined are sensitive to all different neutrino flavors. We determine how well the flavor content of the DSNB will be reconstructed in the future, for a Mikheyev-Smirnov-Wolfenstein (MSW) scenario as well as a neutrino decay scenario. A large fraction of the flavor space will be excluded, but the heavy-lepton neutrino flux remains a challenge.
