Constraints on the quantum gravity scale from κ-Minkowski spacetime
Institute for Theoretical Physics, University of Wroclaw - pl. Maxa Borna 9, 50-204 Wroclaw, Poland, EU
2 Theory Division, Saha Institute of Nuclear Physics - 1/AF Bidhannagar, Calcutta 700064, India
3 Rudjer Bošković Institute - Bijenička c.54, HR-10002 Zagreb, Croatia
Accepted: 6 October 2010
We compare two versions of deformed dispersion relations (energy vs. momenta and momenta vs. energy) and the corresponding time delay up to the second-order accuracy in the quantum gravity scale (deformation parameter). A general framework describing modified dispersion relations and time delay with respect to different noncommutative κ-Minkowski spacetime realizations is firstly proposed here and it covers all the cases introduced in the literature. It is shown that some of the realizations provide certain bounds on quadratic corrections, i.e. on quantum gravity scale, but it is not excluded in our framework that the quantum gravity scale is the Planck scale. We also show how the coefficients in the dispersion relations can be obtained through a multiparameter fit of the gamma-ray burst (GRB) data.
PACS: 04.60.Bc – Phenomenology of quantum gravity / 02.40.Gh – Noncommutative geometry / 95.55.Ka – X- and γ-ray telescopes and instrumentation
© EPLA, 2010