Impact of cross-section uncertainties on supernova neutrino spectral parameter fitting in the Deep Underground Neutrino Experiment
Impact of cross-section uncertainties on supernova neutrino spectral parameter fitting in the Deep Underground Neutrino Experiment
复制标题
深部中微子实验中截面不确定性对超新星中微子谱参数拟合的影响
DOI：
10.1103/physrevd.107.112012
复制
发表时间：
2023
影响因子：
5
通讯作者：
Adriano, C.
中科院分区：
文献类型：
--
作者：
Abed Abud, A.;Abi, B.;Acciarri, R.;Acero, M. A.;Adames, M. R.;Adamov, G.;Adamowski, M.;Adams, D.;Adinolfi, M.;Adriano, C.
即将进行的深层地下中微子实验（DUNE）的主要目标是测量银河系核心坍缩超新星产生的中微子，如果在实验的生命周期内发生的话。计划用于DUNE的液氩探测器预计将对超新星通量的成分具有独特的敏感性，从而能够进行各种物理和天体物理测量。正确解释这些测量结果的一个关键要求是很好地理解氩上带电电流吸收的能量依赖性总截面。在从玩具分析中模拟提取超新星光谱参数的背景下，我们首次研究了模型不确定性对DUNE超新星中微子物理灵敏度的影响。我们发现，目前大的理论上的不确定性必须大大减少之前theflux参数可以可靠地提取，在没有外部约束的情况下，测量的集成中微子光度小于10%的偏差与DUNE requiresto已知约5%。中微子的光谱形状参数可以被称为优于10%的不确定性的横截面尺度上的20%，虽然他们将是敏感的形状的不确定性。低能氩散射的直接测量对于将理论精度提高到所需水平是非常宝贵的。
A primary goal of the upcoming Deep Underground Neutrino Experiment (DUNE) is to measure theneutrinos produced by a Galactic core-collapse supernova if one should occur during the lifetime of the experiment. The liquid-argon-based detectors planned for DUNE are expected to be uniquely sensitive to thecomponent of the supernova flux, enabling a wide variety of physics and astrophysics measurements. A key requirement for a correct interpretation of these measurements is a good understanding of the energy-dependent total cross sectionfor charged-currentabsorption on argon. In the context of a simulated extraction of supernovaspectral parameters from a toy analysis, we investigate the impact ofmodeling uncertainties on DUNE’s supernova neutrino physics sensitivity for the first time. We find that the currently large theoretical uncertainties onmust be substantially reduced before theflux parameters can be extracted reliably; in the absence of external constraints, a measurement of the integrated neutrino luminosity with less than 10% bias with DUNE requiresto be known to about 5%. The neutrino spectral shape parameters can be known to better than 10% for a 20% uncertainty on the cross-section scale, although they will be sensitive to uncertainties on the shape of. A direct measurement of low-energy-argon scattering would be invaluable for improving the theoretical precision to the needed level.