Results 71 to 80 of about 25,203 (212)
Massless and Massive Vector Goldstone Bosons in Nonlinear Quantum Electrodynamics [PDF]
, 2006 The spontaneous Lorentz invariance violation (SLIV) developing in QED type theories with the nonlinear four-vector field constraint $A_{\mu}^{2}=M^{2}$ (where $M$ is a proposed scale of the Lorentz violation) is considered in the case when the internal U(
Chkareuli, J. L., Kepuladze, Z. R.
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Lorentz Violation in Extra Dimensions
, 2005 In theories with extra dimensions it is well known that the Lorentz invariance of the $D=4+n$-dimensional spacetime is lost due to the compactified nature of the $n$ dimensions leaving invariance only in 4d.
Anapole moments for SM fermions have been considered by many authors see +18 more
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Nanophotonics, Volume 15, Issue 8, 24 April 2026.A pattern‐free nonreciprocal emitter is demonstrated, exhibiting strong nonreciprocity (η > 0.6 or 0.8) across an unprecedented angular range (Δθ = 75° or 60°) at the target wavelength with monochromaticity of Δλ/λ₀ < 0.54%. The wavelength is tunable without compromising the rainbow‐free or ultrawide angular response, establishing a generalizable ...
Kaixia Xu +4 more
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Lorentz Invariance Violation from Gamma-Ray Bursts
The Astrophysical JournalLorentz invariance violation (LV) is examined through the time delay between high-energy and low-energy photons in gamma-ray bursts (GRBs). Previous studies determined the LV energy scale as E _LV ≃ 3.60 × 10 ^17 GeV using Fermi Gamma-ray Space Telescope
Hanlin Song, Bo-Qiang Ma
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Neutrino Lorentz invariance violation from cosmic fields
Physics Letters BFrom a cosmological perspective, scalar fields are well-motivated dark matter and dark energy candidates. Several possibilities of neutrino couplings with a time-varying cosmic field have been investigated in the literature.
Rubén Cordero, Luis A. Delgadillo
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Tests of Lorentz Symmetry in Single Beta Decay
Advances in High Energy Physics, 2014 Low-energy experiments studying single beta decay can serve as sensitive probes of Lorentz invariance that can complement interferometric searches for deviations from this spacetime symmetry.
Jorge S. Díaz
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Contributions to Pion Decay from Lorentz Violation in the Weak Sector [PDF]
, 2013 Lorentz violation in the weak sector would affect the beta-decay lifetimes of pions. The decay amplitude may be rendered anisotropic, but only an isotropic violation of boost invariance can affect the net lifetime in the center of mass frame.
Altschul, Brett
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Fortschritte der Physik, Volume 74, Issue 4, April 2026.Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
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Momentum-resolved probing of Lorentz-violating dispersion relations via Unruh-DeWitt detector
Physics Letters BInspired by quantum gravity frameworks predicting Planck-scale deviations from Lorentz invariance, we probe Lorentz symmetry violation via modified dispersion relations ω|k|.
Hao Xu
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Testing Lorentz invariance in β decay
EPJ Web of Conferences, 2014 In theories aiming to unify the Standard Model with gravity, Lorentz invariance may be broken. Although Lorentz symmetry appears to hold well, few experiments have been performed that consider its violation in the weak interaction.
Sytema A.
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