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## DSpace/Manakin Repository

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• (Elsevier, 2012)
Bipartite Riemann–Finsler geometries with complementary Finsler structures are constructed. Calculable examples are presented based on a bilinear-form coefficient for explicit Lorentz violation.
• (Elsevier, 2010)
Classical point-particle relativistic lagrangians are constructed that generate the momentum–velocity and dispersion relations for quantum wave packets in Lorentz-violating effective field theory.
• (IOP Publishing, 2008)
A general framework for tests of Lorentz invariance with electromagnetic waves is presented, allowing for operators of arbitrary mass dimension. Signatures of Lorentz violations include vacuum birefringence, vacuum dispersion, ...
• (Elsevier, 2005)
Gauge-noninvariant vector field theories with superficially nonrenormalizable nonpolynomial interactions are studied. We show that nontrivial relevant and stable theories have spontaneous Lorentz violation, and we present ...
• (American Physical Society, 2000)
A search for sidereal variations in the frequency difference between co-located $^{129}\text{Xe}$ and $^{3}\text{He}$ Zeeman masers sets the most stringent limit to date on leading-order Lorentz and $CPT$ violation involving ...
• (American Physical Society, 2012)
Using data collected with the D0 detector at the Fermilab Tevatron Collider, corresponding to $5.3 \text{fb}^{−1}$ of integrated luminosity, we search for violation of Lorentz invariance by examining the $t\bar{t}$ production ...
• (American Physical Society, 2008)
Exceptional sensitivity to spacetime torsion can be achieved by searching for its couplings to fermions. Recent experimental searches for Lorentz violation are exploited to extract new constraints involving 19 of the 24 ...
• (American Physical Society, 2014)
The prospects are explored for testing Lorentz and $CPT$ symmetry in the muon sector via the spectroscopy of muonium and various muonic atoms, and via measurements of the anomalous magnetic moments of the muon and antimuon. ...
• (American Physical Society, 2015)
Comparatively few searches have been performed for violations of local Lorentz invariance in the pure-gravity sector. We show that tests of short-range gravity are sensitive to a broad class of unconstrained and novel ...
• (American Physical Society, 2014)
The recent observation of high-energy astrophysical neutrinos can be used to constrain violations of Lorentz invariance emerging from a quantum theory of gravity. We perform threshold and Čerenkov analyses that improve ...
• (American Physical Society, 2013)
In some quantum theories of gravity, deviations from the laws of relativity could be comparatively large while escaping detection to date. In the neutrino sector, precision experiments with beta decay yield new and improved ...
• (American Physical Society, 2011)
The gravitational couplings of matter are studied in the presence of Lorentz and $CPT$ violation. At leading order in the coefficients for Lorentz violation, the relativistic quantum Hamiltonian is derived from the ...
• (American Physical Society, 2010)
Recent evidence for anomalous $CP$ violation in $B$-meson oscillations can be interpreted as resulting from $CPT$ violation. This yields the first sensitivity to $CPT$ violation in the $B^{0}_{s}$ system, with the relevant ...
• (American Physical Society, 2009)
Deviations from relativity are tightly constrained by numerous experiments. A class of unmeasured and potentially large violations is presented that can be tested in the laboratory only via weak-gravity couplings. Specialized ...
• (American Physical Society, 2009)
We investigate a class of theories involving a symmetric two-tensor field in Minkowski spacetime with a potential triggering spontaneous violation of Lorentz symmetry. The resulting massless Nambu-Goldstone modes are shown ...
• (American Physical Society, 2011)
This work tabulates measured and derived values of coefficients for Lorentz and $CPT$ violation in the standard-model extension. Summary tables are extracted listing maximal attained sensitivities in the matter, photon, ...
• (American Physical Society, 2006)
We show that the recent measurements of linear polarization in gamma rays from GRB 930131 and GRB 960924 constrain certain types of relativity violations in photons to less than parts in $10^{37}$, representing an improvement ...
• (American Physical Society, 2004)
We consider neutrino oscillations in the minimal Standard-Model Extension describing general Lorentz and $CPT$ violation. Among the models without neutrino mass differences is one with two degrees of freedom that reproduces ...
• (American Physical Society, 2006)
The pure-gravity sector of the minimal standard-model extension is studied in the limit of Riemann spacetime. A method is developed to extract the modified Einstein field equations in the limit of small metric fluctuations ...
• (American Physical Society, 2003)
Space-based experiments offer sensitivity to numerous unmeasured effects involving Lorentz and $CPT$ violation. We provide a classification of clock sensitivities and present explicit expressions for time variations arising ...