Neutrinos and Nuclear Astrophysics at LUNA

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• 作者：Carlo Gustavino ; for the LUNA collaboration
• 关键词：BBN ; neutrino ; Nuclear astrophysics
• 刊名：Nuclear and Particle Physics Proceedings
• 出版年：2016
• 出版时间：April-June 2016
• 年：2016
• 卷：273-275
• 期：Complete
• 页码：1807-1813
• 全文大小：1189 K

文摘

Nuclear astrophysics plays an important role in understanding open issues of neutrino physics. As an example, the two key reactions of the solar p-p chain ³He(³He, 2p)⁴He and ³He(⁴He, γ)⁷Be have been studied at low energy with LUNA, providing an accurate experimental footing for the Standard Solar Model and consequently to study the neutrino mixing parameters. The LUNA collaboration is now studying the D(p, γ)³He reaction at Big Bang Nucleosynthesis (BBN) energies. The poor knowledge of this reaction is the main source of the uncertainty of the primordial abundance of deuterium in BBN calculations. In turn, the abundance of deuterium depends on the number of relativistic species existing in the early Universe, making the comparison between observed an calculated abundance of deuterium a powerful tool to constrain the existence of light sterile neutrinos or any other type of “dark radiation”.