利用旋转扭摆测试手征质量等效原理。

Test of the Equivalence Principle with Chiral Masses Using a Rotating Torsion Pendulum.

机构信息

MOE Key Laboratory of Fundamental Physical Quantities Measurements & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.

TianQin Research Center for Gravitational Physics and School of Physics and Astronomy, Sun Yat-sen University (Zhuhai Campus), Zhuhai 519082, People's Republic of China.

出版信息

Phys Rev Lett. 2018 Dec 28;121(26):261101. doi: 10.1103/PhysRevLett.121.261101.

DOI:10.1103/PhysRevLett.121.261101

PMID:30636147

Abstract

Here we present a new test of the equivalence principle designed to search for the possible violation of gravitational parity using test bodies with different chiralities. The test bodies are a pair of left- and right-handed quartz crystals, whose gravitational acceleration difference is measured by a rotating torsion pendulum. The result shows that the acceleration difference towards Earth Δa_{left-right}=[-1.7±4.1(stat)±4.4(syst)]×10^{-15} m s^{-2} (1-σ statistical uncertainty), correspondingly the Eötvös parameter η=[-1.2±2.8(stat)±3.0(syst)]×10^{-13}. This is the first reported experimental test of the equivalence principle for chiral masses and opens a new way to the search for the possible parity-violating gravitation.

摘要

在这里，我们提出了一个新的等效原理检验，旨在利用具有不同手性的测试体来寻找可能的引力宇称破坏。测试体是一对左旋和右旋石英晶体，其引力加速度差通过旋转扭摆来测量。结果表明，朝向地球的加速度差 Δa_{left-right}=[-1.7±4.1(stat)±4.4(syst)]×10^{-15} m s^{-2} (1-σ 统计不确定度)，相应的艾托夫参数 η=[-1.2±2.8(stat)±3.0(syst)]×10^{-13}。这是首次报道的手性质量等效原理实验检验，为寻找可能的宇称破坏引力开辟了新途径。