Ultraviolet modifications of dispersion relations in effective field theory

Details Ultraviolet modifications of dispersion relations in effective field theory Ultraviolet modifications of dispersion relations in effective field theory

2003-01-17

arxiv.org/abs/hep-ph/0301124v2

Phys.Rev.Lett. 90 (2003) 211601

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version to appear in Phys.Rev.Lett

Scientific paper

10.1103/PhysRevLett.90.211601

The existence of a fundamental ultraviolet scale, such as the Planck scale, may lead to modifications of the dispersion relations for particles at high energies, in some scenarios of quantum gravity. We apply effective field theory to this problem and identify dimension 5 operators that do not mix with dimensions 3 and 4 and lead to cubic modifications of dispersion relations for scalars, fermions, and vector particles. Further we show that, for electrons, photons and light quarks, clock comparison experiments bound these operators at 10^{-5}/Mpl.

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