scholarly journals Lorentz symmetry violation in QCD and the frustration of asymptotic freedom

2020 ◽  
Vol 101 (8) ◽  
Author(s):  
I. T. Drummond
Keyword(s):  
Lorentz Symmetry ◽  
Asymptotic Freedom ◽  
Symmetry Violation

scholarly journals Fermionic Casimir effect in Horava–Lifshitz theories

2019 ◽  
Vol 34 (20) ◽  
pp. 1950107
Author(s):  
Dêivid R. da Silva ◽  
M. B. Cruz ◽  
E. R. Bezerra de Mello
Keyword(s):  
Boundary Condition ◽  
Casimir Effect ◽  
Lorentz Symmetry ◽  
Casimir Energy ◽  
Quantum Field ◽  
Parallel Plates ◽  
Symmetry Violation ◽  
Massless Quantum

In this paper, we analyze the fermionic Casimir effects associated with a massless quantum field in the context of Lorentz symmetry violation approach based on Horava–Lifshitz methodology. In order to obtain these observables, we impose the standard MIT bag boundary condition on the fields on two large and parallel plates. Our main objectives are to investigate how the Casimir energy and pressure depend on the parameter associated with the breaking of Lorentz symmetry.

scholarly journals Lorentz symmetry violation, dark matter and dark energy

2010 ◽  
Author(s):  
Luis Gonzalez-Mestres ◽  
Jean-Michel Alimi ◽  
André Fuözfa
Keyword(s):  
Dark Matter ◽  
Dark Energy ◽  
Lorentz Symmetry ◽  
Symmetry Violation

On the effects of the Lorentz symmetry violation in a magnetic medium at a low energy scenario

2018 ◽  
Vol 33 (36) ◽  
pp. 1850216
Author(s):  
K. Bakke ◽  
C. Salvador ◽  
H. Belich
Keyword(s):  
Magnetic Field ◽  
Scalar Field ◽  
Electric Field ◽  
Anharmonic Oscillator ◽  
Lorentz Symmetry ◽  
Low Energy ◽  
Symmetry Violation ◽  
Magnetic Medium ◽  
Energy Scenario ◽  
The Magnetic Field

It is analyzed the influence of a fixed background that breaks the Lorentz symmetry on the scalar field in the nonrelativistic regime. It is considered a medium with a nonuniform magnetization and the presence of an induced electric field. Then, due to the effects of the Lorentz symmetry violation, it is shown that the interaction of the scalar field with the magnetic field (produced by the nonuniform magnetization) and the induced electric field yields an effective potential analogous to the double anharmonic oscillator. Thereby, a discrete spectrum of energy can stem from the effects of the violation of the Lorentz symmetry on the scalar field.

scholarly journals Testing CPT Symmetry with Neutral K Mesons: A Review

Symmetry ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2063
Author(s):  
Antonio Di Domenico
Keyword(s):  
Quantum Gravity ◽  
Phenomenological Models ◽  
Discrete Symmetry ◽  
Neutral Kaon ◽  
Lorentz Symmetry ◽  
Cpt Symmetry ◽  
Symmetry Violation ◽  
Gravity Effects ◽  
K Mesons

The neutral kaon system is a very peculiar system that offers unique possibilities to perform precise tests of the CPT symmetry. The entanglement of neutral kaon pairs that are produced at a ϕ-factory opens up new ways and scenarios in order to test this fundamental discrete symmetry. In this paper, the results of the most recent and significant CPT tests are reviewed. Experiments have set stringent limits on the CPT-violating parameters of different phenomenological models, some of them associated to possible decoherence mechanisms or Lorentz symmetry violation which might be justified in a quantum gravity framework. The present results show no violation of CPT symmetry, while their accuracy in some cases reaches the interesting level at which–in the most optimistic scenarios–quantum gravity effects might show up.

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