Constraining Spacetime Nonmetricity with Neutron Spin Rotation in Liquid He-4

Abstract

General spacetime nonmetricity coupled to neutrons is studied. In this context, it is shown that certain nonmetricity components can generate a rotation of the neutron's spin. Available data on this effect obtained from slow-neutron propagation in liquid helium are used to constrain isotropic nonmetricity components at the level of $10^{-22}$GeV. These results represent the first limit on the nonmetricity ${\zeta }_2^{(6)}{S}_{000}$ parameter as well as the first measurement of nonmetricity inside matter.

5 pages, accepted for publication in Physics Letters B

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Cited by in corpus (4)

• Searches for beyond-Riemann gravity
• Searching for CPT Violation with Neutral-Meson Oscillations
• Beta-Decay Spectrum and Lorentz Violation
• Experimental Upper Bound and Theoretical Expectations for Parity-Violating Neutron Spin Rotation in 4He