Naslov
Constraints on the quantum gravity scale from kappa - Minkowski spacetime

Autori
Borowiec, Andrzej ; Gupta, Kumar S. ; Meljanac, Stjepan ; Pachoł, Anna

Izvornik
Europhysics letters (0295-5075) 92 (2010), 2; 20006-20011

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
kappa-deformed space ; quantum gravity scale ; deformed dispersion relations ; time delay

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA