Solar Neutrino Flux Variability

太阳中微子通量变化

• 批准号: 0097128
• 负责人: Peter Sturrock
• 金额: $ 18万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0097128&HistoricalAwards=false
• 关键词: Solar; Neutrino; Flux; Variability

Sturrock, Peter" Solar Neutrino Flux Variability "AST- 0097128The deficiency of observed neutrinos emanating from the Sun has been one of the most intriguing problems of solar astrophysics in recent years. Most researchers now believe that this is more a consequence of neutrino physics and explain the deficiency as a consequence of the transformation of electron neutrinos into muon or tau neutrinos as they fly out of the center of the Sun. Since the Sun's structure is very stable, the flux of neutrinos should be constant. But in arguments that are addressed in this award, the PI and his collaborators believe that magnetic fields may play an important part. In recent papers, they point out that, if the neutrino has a very small magnetic moment, then the magnetic field of the sun, which is not distributed isotropically, could modulate the neutron flux by converting left-handed neutrinos into right-handed neutrinos which would not be registered by terrestrial detectors. The PI and his team support their theory by claiming that the neutrino flux from the Sun varies with a period close to the rotation period of the deep convection zone. The evidence comes from a sophisticated analysis of existing Homestake and GALLEX-GNO data. There are many critics of this analysis. The principal effort made in this award will be to address the critics by reviewing previous analyses and to make preparations for the study of the Super-Kamiokande data and other data sets, as they become available.***

“太阳中微子通量变率”AST-0097128观测到的从太阳发出的中微子的不足一直是近年来太阳天体物理学最有趣的问题之一。大多数研究人员现在认为，这在更大程度上是中微子物理的结果，并解释了这种缺陷是因为电子中微子飞出太阳中心时转化为Muon或tau中微子的结果。由于太阳的结构非常稳定，中微子的通量应该是恒定的。但在这个奖项中涉及的争论中，PI和他的合作者认为磁场可能起到重要作用。在最近的论文中，他们指出，如果中微子有一个非常小的磁矩，那么太阳的磁场不是各向同性分布的，可以通过将左手中微子转化为右手中微子来调制中子通量，而地球探测器不会记录这些中微子。PI和他的团队支持他们的理论，声称来自太阳的中微子通量随着靠近深对流区自转周期的周期而变化。证据来自对现有Homestake和GALLEX-GNO数据的复杂分析。这一分析有很多批评者。该奖项的主要工作将是通过审查以前的分析来解决批评者的问题，并为研究超级神冈数据和其他可用的数据集做准备。