Speaker
Description
The fifth force may arise due to “new physics” beyond the Standard Model. We focus on the spin-dependent fifth forces that are mediated by new particles, such as spin-0 particles (axion and axion-like particles) and spin-1 particles (e.g., light Z’ particle or massless paraphoton). These new ultralight particles are also candidates for dark matter and dark energy, and may also break fundamental symmetries. Spin-dependent interactions between fermions have been extensively searched for in experiments, employing methods such as comagnetometers, nitrogen-vacancy spin sensors, and precision measurements of atomic and molecular spectra [1, 2, 3]. Our research involves a theoretical reassessment of exotic spin-dependent forces [4]. It produces a systematic and complete set of interaction potentials expressed in terms of reduced coupling constants. We conduct an extensive analysis of the existing body of experimental literature on spin-dependent fifth forces, which produces systematic exclusion plots. This leads to a comprehensive understanding of the current research landscape and provide insights for further research.
+conglei1@uni-mainz.de, #wei.ji.physics@gmail.com; *Equal contribution.
References:
[1] Wei Ji, Weipeng Li, Pavel Fadeev, Filip Ficek, Jianan Qin, Kai Wei, Yong-Chun Liu, & Dmitry Budker (2023). Constraints on Spin-Spin Velocity-Dependent Interactions. Physical Review Letters, 130(13), 133202.
[2] Xing Rong, Mengqi Wang, Jianpei Geng, Xi Qin, Maosen Guo, Man Jiao, Yijin Xie, Pengfei Wang, Pu Huang, Fazhan Shi, Yi-Fu Cai, Chongwen Zou, and Jiangfeng Du (2018). Searching for an exotic spin-dependent interaction with a single electron-spin quantum sensor. Nature Communications, 9(1), 739.
[3] Filip Ficek, Pavel Fadeev, Victor V. Flambaum, Derek F. Jackson Kimball, Mikhail G. Kozlov, Yevgeny V. Stadnik, and Dmitry Budker (2018). Constraints on exotic spin-dependent interactions between matter and antimatter from antiprotonic helium spectroscopy. Physical Review Letters, 120(18), 183002.
[4] Pavel Fadeev, Yevgeny V. Stadnik, Filip Ficek, Mikhail G. Kozlov, Victor V. Flambaum, and Dmitry Budker (2019). Revisiting spin-dependent forces mediated by new bosons: Potentials in the coordinate-space representation for macroscopic-and atomic-scale experiments. Physical Review A, 99(2), 022113.
