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The analogy of LV fermion-gravity and fermion-photon couplings

Aug 10, 2022, 3:30 PM
Oral report TeV物理和超出标准模型新物理 Parallel Session V (1):TeV and BSM Physics


Prof. Zhi Xiao (Department of Mathematics and Physics, North China Electric Power University)


By adopting a non-relativistic (NR) reduction method, we study the one-fermion matrix elements between the fermion-gravity and the fermion-photon interactions in the presence of the minimal Lorentz-violating (LV) fermion coefficients. We prescribed the Lense-Thirring (LT) metric with the test particle assumption, as this metric is essentially curved and may demonstrate some novel LV matter-gravity couplings beyond the conventional test of equivalence principle.
With some bold but reasonable assumptions, we get a LV spin-gravity interaction Hamiltonian,
from which we derive the LV corrected spin precession and gravitational acceleration.
With some ad hoc assumptions, we get some very rough bounds on several LV
coefficients, such as $|3\vec{\tilde{H}}-2\vec{b}|\leq1.46\times10^{-5}\mathrm{eV}$,
from those spin-gravity measurements like the Gravity Probe B (GPB).

Primary author

Prof. Zhi Xiao (Department of Mathematics and Physics, North China Electric Power University)


Mr Cheng Ye (Insistute of Theoretical Physics, CAS)

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