2,091 research outputs found
Classical kinematics and Finsler structures for nonminimal Lorentz-violating fermions
In the current paper the Lagrangian of a classical, relativistic point
particle is obtained whose conjugate momentum satisfies the dispersion relation
of a quantum wave packet that is subject to Lorentz violation based on a
particular coefficient of the nonminimal Standard-Model Extension (SME). The
properties of this Lagrangian are analyzed and two corresponding Finsler
structures are obtained. One structure describes a scaled Euclidean geometry,
whereas the other is neither a Riemann nor a Randers or Kropina structure. The
results of the article provide some initial understanding of classical
Lagrangians of the nonminimal SME fermion sector.Comment: 26 pages, 5 figure
Obtaining bounds from ultra-high energy cosmic rays in isotropic modified Maxwell theory
This article reviews the methods used to obtain a two-sided bound on
isotropic modified Maxwell theory from experimental data of ultra high-energy
cosmic rays in 2008. The bound is updated with results from the HEGRA
experiment.Comment: 4 pages, presented at the Sixth Meeting on CPT and Lorentz symmetry;
June 17 - 21, 2013; Bloomington, Indiana (USA
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