https://doi.org/10.1140/epjc/s10052-021-09392-2
Regular Article - Theoretical Physics
Bounds on gravitational parity violation using a rotating torsion pendulum with chiral masses
Departamento de Física Aplicada, Universidad de Alicante, Campus de San Vicente del Raspeig, 03690, Alicante, Spain
Received:
22
February
2021
Accepted:
27
June
2021
Published online:
3
July
2021
In this letter we employ recent results on gravitationally induced parity violation with a rotating torsion pendulum whose test bodies are quartz enantiomers (Zhu et al. in Phys Rev Lett 121:261101, 2018) in order to estimate, using a simple model, Hari Dass’s 
constant which parametrizes the strength of parity violation in the gravitational interaction. The result here obtained, 
, is in agreement with estimations based on high resolution experiments performed using chiral molecules, showing that the Hari-Dass’s framework for spin-dependent gravity, together with our simple model, are versatile enough in order to be applied to the analysis of other experimental results involving spin-dependent gravitational effects. Interestingly, it can also be used to constrain indirectly parity-violating effects in macroscopic samples of quartz crystals due to electron–nucleon interactions.
© The Author(s) 2021
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