Lorentz Symmetry Violation and Superluminal Particles at Future Colliders

Details Lorentz Symmetry Violation and Superluminal Particles at Future Colliders Lorentz Symmetry Violation and Superluminal Particles at Future Colliders

1997-08-25

arxiv.org/abs/physics/9708028v2

Physics

General Physics

Contributed Paper 438 to the EPS-HEP97 Conference, Jerusalem August 19 - 26, 1997 ; 6 pages, LaTex

Scientific paper

If textbook Lorentz invariance is actually a property of the equations describing a sector of the excitations of vacuum above some critical distance scale, several sectors of matter with different critical speeds in vacuum can coexist and an absolute rest frame (the vacuum rest frame) may exist without contradicting the apparent Lorentz invariance felt by "ordinary" particles (particles with critical speed in vacuum equal to $c$, the speed of light). Sectorial Lorentz invariance, reflected by the fact that all particles of a given dynamical sector have the same critical speed in vacuum, will then be an expression of a fundamental sectorial symmetry (e.g. preonic grand unification or extended supersymmetry) protecting a parameter of the equations of motion. Furthermore, the sectorial Lorentz symmetry may be only a low-energy limit, in the same way as the relation $\omega $ (frequency) = $c_s$ (speed of sound) $k$ (wave vector) holds for low-energy phonons in a crystal. In this context, phenomena such as the absence of Greisen-Zatsepin-Kuzmin cutoff and the stability of unstable particles at very high energy are basic properties of a wide class of noncausal models where local Lorentz invariance is broken introducing a fundamental length. Observable phenomena from Lorentz symmetry violation and superluminal sectors of matter are expected at very short wavelength scales, even if Lorentz symmetry violation remains invisible to standard low-energy tests. We discuss signatures of this new physics at LHC and at other possible future colliders.

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