Quantum gravity corrections to particle interactions

Details Quantum gravity corrections to particle interactions Quantum gravity corrections to particle interactions

2002-05-24

arxiv.org/abs/gr-qc/0205103v1

Mod.Phys.Lett. A17 (2002) 943-954

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, no figures, MPL LaTeX style; Invited talk at the " First IUCAA Meeting on the Interface of Gravitational and Quantum

Scientific paper

10.1142/S0217732302007648

An heuristic semiclassical procedure that incorporates quantum gravity induced corrections in the description of photons and spin 1/2 fermions is reviewed. Such modifications are calculated in the framework of loop quantum gravity and they arise from the granular structure of space at short distances. The resulting effective theories are described by power counting nonrenormalizable actions which exhibit Lorentz violations at Planck length scale. The modified Maxwell and Dirac equations lead to corrections of the energy momentum relations for the corresponding particle at such scale. An action for the relativistic point particle exhibiting such modified dispersion relations is constructed and the first steps towards the study of a consistent coupling between these effective theories are presented.

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