Limits on violations of Lorentz symmetry from Gravity Probe B

Bailey, Quentin G.; Everett, R.; Overduin, James

doi:10.1103/physrevd.88.102001

Cited by 61 publications

(81 citation statements)

References 40 publications

(67 reference statements)

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“…The limit in Eq. (35) is about 500 times better than the current best (yet unique) limit from the GPB experiment [25].…”

Section: Ttmentioning

confidence: 78%

“…This component hardly plays an role in gravity experiments hence it is difficult to be constrained [24]. Only until recently, Bailey et al obtained the first empirical limit of |s TT | < 3.8 × 10 −3 (68% CL) from the GPB experiment [25]. Thes TT coefficient has no effect at leading order on the orbital dynamics of binary pulsars if we ignore the relative velocity of the binary to the PF [24].…”

Section: Introductionmentioning

confidence: 99%

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New pulsar limit on local Lorentz invariance violation of gravity in the standard-model extension

Shao

2014

Phys. Rev. D

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In the pure-gravity sector of the minimal standard-model extension, nine Lorentz-violating coefficients of a vacuum-condensed tensor field describe dominant observable deviations from general relativity, out of which eight were already severely constrained by precision experiments with lunar laser ranging, atom interferometry, and pulsars. However, the time-time component of the tensor field,s TT , dose not enter into these experiments, and was only very recently constrained by Gravity Probe B. Here we propose a novel idea of using the Lorentz boost between different frames to mix different components of the tensor field, and thereby obtain a stringent limit ofs TT from binary pulsars. We perform various tests with the state-of-the-art white dwarf optical spectroscopy and pulsar radio timing observations, in order to get new robust limits ofs TT . With the isotropic cosmic microwave background as a preferred frame, we get |s TT | < 1.6 × 10 −5 (95% CL), and without assuming the existence of a preferred frame, we get |s TT | < 2.8 × 10 −4 (95% CL). These two limits are respectively about 500 times and 30 times better than the current best limit.

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“…The limit in Eq. (35) is about 500 times better than the current best (yet unique) limit from the GPB experiment [25].…”

Section: Ttmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

New pulsar limit on local Lorentz invariance violation of gravity in the standard-model extension

Shao

2014

Phys. Rev. D

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“…It would be of interest to calculate such terms to determine their possible effects on gravitational waves but this lies beyond the scope of the present work. It suffices here to note that when inserted into (10) …”

Section: Radiation Effectsmentioning

confidence: 99%

Anisotropic cubic curvature couplings

Bailey

2016

Phys. Rev. D

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To complement recent work on tests of spacetime symmetry in gravity, cubic curvature couplings are studied using an effective field theory description of spacetime-symmetry breaking. The associated mass dimension 8 coefficients for Lorentz violation studied do not result in any linearized gravity modifications and instead are revealed in the first nonlinear terms in an expansion of spacetime around a flat background. We consider effects on gravitational radiation through the energy loss of a binary system and we study two-body orbital perturbations using the post-Newtonian metric. Some effects depend on the internal structure of the source and test bodies, thereby breaking the Weak Equivalence Principle for self-gravitating bodies. These coefficients can be measured in solar-system tests, while binary-pulsar systems and short-range gravity tests are particularly sensitive.

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“…We also extend the analysis to incorporate the 2002 dataset obtained with the apparatus located in Boulder, CO [9]. Note that existing searches for pure-gravity local Lorentz violation within this framework have been restricted to the context of a Lorentz-violating inversesquare law [11][12][13][14][15][16][17][18]. A few other short-range experiments [19][20][21][22] may have potential sensitivity to the modifications (1), while some experiments optimized for nonperturbative corrections to Newton's law could conceivably be adjusted to study perturbative effects [23][24][25][26].…”

mentioning

confidence: 99%