Infrared and ultraviolet cutoffs of quantum field theory

Details Infrared and ultraviolet cutoffs of quantum field theory Infrared and ultraviolet cutoffs of quantum field theory

2000-12-05

arxiv.org/abs/hep-th/0012028v2

Phys.Rev. D65 (2002) 025006

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, no figures; general discussion improved, main results unchanged. Version to appear in PRD

Scientific paper

10.1103/PhysRevD.65.025006

Quantum gravity arguments and the entropy bound for effective field theories proposed in PRL 82, 4971 (1999) lead to consider two correlated scales which parametrize departures from relativistic quantum field theory at low and high energies. A simple estimate of their possible phenomenological implications leads to identify a scale of around 100 TeV as an upper limit on the domain of validity of a quantum field theory description of Nature. This fact agrees with recent theoretical developments in large extra dimensions. Phenomenological consequences in the beta-decay spectrum and cosmic ray physics associated to possible Lorentz invariance violations induced by the infrared scale are discussed. It is also suggested that this scale might produce new unexpected effects at the quantum level.

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