Constraints on the Velocity and Spin Dependent Exotic Interaction at the Micrometer Range

Jihua Ding, Jianbo Wang, Xue Zhou, Yu Liu, Ke Sun, Adekunle Olusola Adeyeye, Huixing Fu, Xiaofang Ren, Sumin Li, Pengshun Luo, Zhongwen Lan, Shanqing Yang, and Jun Luo

Phys. Rev. Lett. 124, 161801 – Published 20 April 2020

Abstract

We report on an experimental test of the velocity and spin dependent exotic interaction that can be mediated by new light bosons. The interaction is searched by measuring the force between a gold sphere and a microfabricated magnetic structure using a cantilever. The magnetic structure consists of stripes with antiparallel electron spin polarization so that the exotic interaction between the polarized electrons in the magnetic structure and the unpolarized nucleons in the gold sphere varies periodically, which helps to suppress the spurious background signals. The experiment sets the strongest laboratory constraints on the coupling constant between electrons and nucleons at the micrometer range with $f_{⊥} < 5.3 \times 10^{- 8}$ at $λ = 5 μ m$ .

Received 29 January 2020
Revised 22 March 2020
Accepted 25 March 2020

DOI:https://doi.org/10.1103/PhysRevLett.124.161801

Physics Subject Headings (PhySH)

Hypothetical particle physics models Statistical field theory

Hypothetical gauge bosons

Precision measurements

Particles & Fields

Authors & Affiliations

Jihua Ding^1,*, Jianbo Wang^1,*, Xue Zhou², Yu Liu³, Ke Sun³, Adekunle Olusola Adeyeye^2,4, Huixing Fu¹, Xiaofang Ren¹, Sumin Li¹, Pengshun Luo ^1,†, Zhongwen Lan³, Shanqing Yang^1,5, and Jun Luo^1,5,‡

¹MOE Key Laboratory of Fundamental Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
²Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
³School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
⁴Department of Physics, Durham University, South Road, Durham DH1 3LE, United Kingdom
⁵TIANQIN Research Center for Gravitational Physics, School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082, China

^*These authors have contributed equally to this work.
^†pluo2009@hust.edu.cn
^‡junluo@mail.sysu.edu.cn

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Vol. 124, Iss. 16 — 24 April 2020

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