Test of relativistic time dilation with fast optical atomic clocks at different velocities

Reinhardt, S.; Saathoff, G.; Buhr, H.; Carlson, Lars A.; Wolf, A.; Schwalm, D.; Karpuk, S.; Novotny, C.; Huber, G.; Zimmermann, M.; Holzwarth, Ronald; Udem, Thomas; Hänsch, Theodor W.; Gwinner, G.

doi:10.1038/nphys778

Cited by 138 publications

(99 citation statements)

References 30 publications

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“…[10]. The difficulty of bounding κ tr in laboratory experiments is that its effects always appear in combination with a quadratic A precision measurement [11] of the electron anomalous magnetic moment a e ≡ (g e −2)/2, combined with a four-loop calculation of standard QED [12], gives an indirect bound [13] on κ tr which is approximately a factor 6 better than the direct bound (3).…”

Section: Isotropic Modified-maxwell Theory and Current Boundsmentioning

confidence: 99%

New two-sided bound on the isotropic Lorentz-violating parameter of modified Maxwell theory

2008

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There is a unique Lorentz-violating modification of the Maxwell theory of photons, which maintains gauge invariance, CPT, and renormalizability. Restricting the modified-Maxwell theory to the isotropic sector and adding a standard spin-1 2 Dirac particle p ± with minimal coupling to the nonstandard photon γ, the resulting modified-quantum-electrodynamics model involves a single dimensionless "deformation parameter," κ tr . The exact tree-level decay rates for two processes have been calculated: vacuum Cherenkov radiation p ± → p ± γ for the case of positive κ tr and photon decay γ → p + p − for the case of negative κ tr . From the inferred absence of these decays for a particular high-quality ultrahigh-energy-cosmic-ray event detected at the Pierre Auger Observatory and a well-established excess of TeV gamma-ray events observed by the High Energy Stereoscopic System telescopes, a two-sided bound on κ tr is obtained, which improves by eight orders of magnitude upon the best direct laboratory bound. The implications of this result are briefly discussed.

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Section: Isotropic Modified-maxwell Theory and Current Boundsmentioning

confidence: 99%

New two-sided bound on the isotropic Lorentz-violating parameter of modified Maxwell theory

2008

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“…Since the Standard Model is thought to be the low-energy limit of a more fundamental theory that unifies quantum physics and gravity at the Planck scale, m P ≃ 10 19 GeV, it is suggested in [2] that the violations of Lorentz and CPT symmetries predicted by the SME provide a link to Planck scale physics. Although the magnitude of LV signatures in the accessible energy limit are suppressed by a factor of order the electroweak scale divided by the Planck scale, m W /m P ∼ 10 −17 [3], these low-energy probes of new physics have been explored in many ways with current experimental technologies [4].…”

mentioning

confidence: 99%

Testing Lorentz Invariance and CPT Conservation with NuMI Neutrinos in the MINOS Near Detector

Adamson¹,

Andreopoulos²,

Arms³

et al. 2008

Phys. Rev. Lett.

101

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“…The isotropic breakdown of Lorentz invariance in the photonic sector is then controlled by the single coupling constant κ which physically parameterizes a modification of the photon phase velocity. Modern versions of the Ives-Stilwell experiment [7] allow for direct laboratory bounds on this parameter down to the 10 −10 level [8][9][10]. The parameter κ endows the vacuum with an effective index of refraction…”

Section: Introductionmentioning

confidence: 99%

Parton-model calculation of a nonstandard decay process in isotropic modified Maxwell theory

Díaz

Klinkhamer

2015

Phys. Rev. D

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We have performed a calculation in the parton-model approximation of a nonstandard decay process in isotropic modified Maxwell theory coupled to standard Dirac theory, with a single Lorentz-violating parameter κ in the photonic sector. Previous calculations of this process (vacuum Cherenkov radiation by a proton for the theory with κ > 0) were performed for pointlike particles, and an upper bound on κ at the 10 −19 level was obtained from experimental data on ultra-high-energy cosmic rays. The parton-model results change the decay rate by about an order of magnitude but give the same upper bound on κ because the threshold energy is unchanged. The previous point-particle calculation of photon decay into an electron-positron pair for the theory with κ < 0 remains valid, and experimental results on cosmic gamma rays provide a lower bound on κ at the −10 −15 level.

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Test of relativistic time dilation with fast optical atomic clocks at different velocities

Cited by 138 publications

References 30 publications

New two-sided bound on the isotropic Lorentz-violating parameter of modified Maxwell theory

New two-sided bound on the isotropic Lorentz-violating parameter of modified Maxwell theory

Testing Lorentz Invariance and CPT Conservation with NuMI Neutrinos in the MINOS Near Detector

Parton-model calculation of a nonstandard decay process in isotropic modified Maxwell theory

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