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82 papers
Probing Lorentz invariance via diphoton decays of the Higgs boson
Alan Kostelecky, Connor A. Petway, Nathaniel Sherrill
The prospects for observing small departures from Lorentz invariance are studied using effective interactions of the Higgs boson with photons. A single operator of mass-dimension f…
Progress in Lorentz and CPT Violation
Alan Kostelecky
This talk at the CPT'25 meeting presents an overview of some recent results in Lorentz and CPT violation. Topics covered include the geometry of Finsler spaces associated with Lore…
Lorentz violation and momentum-space geometric phases
Alan Kostelecky, Ralf Lehnert, Marco Schreck +1
Geometric phases can manifest when a relativistic quantum particle moves cyclically along a loop in parameter space. The phase can be affected by the presence of a background field…
Relativistic spin precession in homogeneous background fields
Yunhua Ding, Alan Kostelecky, Arnaldo J. Vargas
The Bargmann-Michel-Telegdi equation, which describes the precession of the spin of a charged Dirac particle moving in a homogeneous electromagnetic field, is generalized to includ…
Characteristic tensors for almost Finsler manifolds
James F. Davis, Benjamin R. Edwards, Alan Kostelecky
Almost Finsler manifolds and partial Finsler manifolds are introduced, extending the standard definition of a Finsler manifold to allow for a nontrivial slit containing points fixe…
Nonperturbative Lorentz Violation and Field Quantization
Alan Kostelecky, Ralf Lehnert, Marco Schreck +1
Regimes of Lorentz-violating effective field theories are studied in which departures from Lorentz symmetry are nonperturbative. Within a free toy theory exhibiting Lorentz breakdo…