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#### Gravitational-Wave Implications for the Parity Symmetry of Gravity at GeV Scale

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2002.05668.pdf

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##### Citation

Wang, Y.-F., Niu, R., Zhu, T., & Zhao, W. (2021). Gravitational-Wave Implications
for the Parity Symmetry of Gravity at GeV Scale.* The Astrophysical Journal,* *908*(1):
58. doi:10.3847/1538-4357/abd7a6.

Cite as: https://hdl.handle.net/21.11116/0000-0005-B032-B

##### Abstract

Gravitational waves generated by the coalescence of compact binary open a new

window to test the fundamental properties of gravity in the strong-field and

dynamical regime. In this work, we focus on the parity symmetry of gravity

which, if broken, can leave imprints on the waveform of gravitational wave. We

construct generalized waveforms with amplitude and velocity birefringence due

to parity violation in the effect field theory formalism, then analyze the open

data of the ten binary black-hole merger events and the two binary neutron-star

merger events detected by LIGO and Virgo collaboration. We do not find any

signatures of violation of gravitational parity conservation, thereby setting

the lower bound of the parity-violating energy scale to be $0.07$ GeV. This

presents the first observational evidence of the parity conservation of gravity

at high energy scale, about 17 orders of magnitude tighter than the constraints

from the Solar system tests and binary pulsar observation. The third-generation

gravitational-wave detector is capable of probing the parity-violating energy

scale at $\mathcal{O}(10^2)$ GeV.

window to test the fundamental properties of gravity in the strong-field and

dynamical regime. In this work, we focus on the parity symmetry of gravity

which, if broken, can leave imprints on the waveform of gravitational wave. We

construct generalized waveforms with amplitude and velocity birefringence due

to parity violation in the effect field theory formalism, then analyze the open

data of the ten binary black-hole merger events and the two binary neutron-star

merger events detected by LIGO and Virgo collaboration. We do not find any

signatures of violation of gravitational parity conservation, thereby setting

the lower bound of the parity-violating energy scale to be $0.07$ GeV. This

presents the first observational evidence of the parity conservation of gravity

at high energy scale, about 17 orders of magnitude tighter than the constraints

from the Solar system tests and binary pulsar observation. The third-generation

gravitational-wave detector is capable of probing the parity-violating energy

scale at $\mathcal{O}(10^2)$ GeV.