New Experimental Limits on Exotic Spin-Spin-Velocity-Dependent Interactions by Using SmCo5 Spin Sources

Ji, Wei (Department of Physics, Tsinghua University, Beijing, 100084, China) ; Chen, Yao (School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing, 100191, China) ; Fu, Changbo (INPAC and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai 200240, China) ; Ding, Ming (School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing, 100191, China) ; Fang, Jiancheng (School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing, 100191, China) ; Xiao, Zhigang (Department of Physics, Tsinghua University, Beijing, 100084, China) ; Wei, Kai (School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing, 100191, China) ; Yan, Haiyang (Key Laboratory of Neutron Physics, Institute of Nuclear Physics and Chemistry, CAEP, Mianyang, Sichuan 621900, China)

28 December 2018

Abstract: Despite the great success of the standard model (SM), there still exist mysteries like the nature of dark matter, the strong CP problems, etc. To solve them, many theories proposed new bosons beyond the SM that can mediate new forces. Here, we report the latest results of searching for possible new long-range spin-spin-velocity-dependent forces (SSVDFs), based on specially designed iron-shielded SmCo5 spin sources and a spin exchange relaxation free comagnetometer. With help from the similarity analysis method, new constraints on some forms of SSVDFs between electrons have been obtained, which represent up to more than 11 orders of magnitude tighter limits than previous experiments for the force range of 5 cm–1 km.


Published in: Physical Review Letters 121 (2018)
Published by: APS
DOI: 10.1103/PhysRevLett.121.261803
arXiv: 1803.02813
License: CC-BY-4.0



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