The Deuterium to Hydrogen ratio: A gateway to new Physics

氘与氢的比例：通向新物理学的大门

• 批准号: 0908825
• 负责人: David Tytler
• 金额: $ 61.73万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0908825&HistoricalAwards=false
• 关键词: Deuterium; Hydrogen; ratio; gateway; new

Dr. Tytler and his team will make new high accuracy measurements, using quasar absorption lines, of the primordial ratio of Deuterium to Hydrogen with the goal of finding new physics beyond the standard model of particle physics. Using a baryon density derived from the WMAP satellite, Big Bang Nucleosynthesis (BBN) for the first time predicts the D/H ratio with no free parameters. This program will test whether the D/H measurements agree with this prediction, either validating our current understanding of BBN, or uncovering new physics. The D/H measurements could reveal a wide variety of new physics, including new types of particles (sterile neutrinos), a difference in the numbers of neutrinos and antineutrinos, long lived decaying particles and deviations from general relativity. The primary broader impact of this proposal is training of undergraduate students in research.

泰特勒博士和他的团队将利用类星体吸收线对氘与氢的原始比率进行新的高精度测量，目标是寻找超越粒子物理学标准模型的新物理学。使用源自 WMAP 卫星的重子密度，大爆炸核合成 (BBN) 首次在没有自由参数的情况下预测了 D/H 比。 该程序将测试 D/H 测量结果是否与这一预测相符，从而验证我们目前对 BBN 的理解，或者揭示新的物理现象。 D/H 测量可以揭示各种新物理学，包括新型粒子（惰性中微子）、中微子和反中微子数量的差异、长寿命衰变粒子以及与广义相对论的偏差。该提案最广泛的影响是对本科生进行研究培训。