International Conference on Precision Physics and Fundamental Physical Constants (FFK-2019)

Rotating-torsion-balance test of the weak equivalence principle - CANCELLED

Not scheduled

30m

Balaton Limnological Research Institute of the Hungarian Academy of Sciences

Session 10: Gravity, new measurements

Speaker

Lin Zhu (Sun Yat-sen University (Zhuhai Campus), Zhuhai)

Description

Rotating-torsion-balance test of the weak equivalence principle

Lin Zhu,1, 2 Qi Liu,1, 2 Hui-Hui Zhao,2 Shan-Qing Yang,2, 1 Cheng-Gang Shao,2, 1 Liang-Cheng Tu,2, 1 and Jun Luo3, 2

1 TianQin Research Center for Gravitational Physics and School of Physics and Astronomy, Sun Yat-sen University (Zhuhai Campus), Zhuhai 519082, Peoples Republic of China
2 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, Peoples Republic of China
3 Sun Yat-sen University, Guangzhou 510275, Peoples Republic of China

The equivalence principle (EP) is the foundation of a wide class of gravitational theories including Einstein’s theory of general relativity. However, the EP is suggested to be violated in most attempts to connect general relativity with the standard model. Here we present a test of the equivalence principle for the left and right-handed quartz crystals using a rotating a torsion balance. The result shows that their gravitational acceleration difference towards Earth
∆aleft-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 ± 4.1) × 10 −13 .