Physics of deformed special relativity: relativity principle revisited
AUTOR(ES)
Girelli, Florian, Livine, Etera R.
FONTE
Brazilian Journal of Physics
DATA DE PUBLICAÇÃO
2005-06
RESUMO
In many different ways, Deformed Special Relativity (DSR) has been argued to provide an effective limit of quantum gravity in almost-flat regime. Unfortunately, DSR is up to now plagued by many conceptual problems (in particular how it describes macroscopic objects) which forbids a definitive physical interpretation and clear predictions. Here we propose a consistent framework to interpret DSR. We extend the principle of relativity: the same way that Special Relativity showed us that the definition of a reference frame requires to specify its speed, we show that DSR implies that we must also take into account its mass. We further advocate a 5- dimensional point of view on DSR physics and the extension of the kinematical symmetry from the Poincar´e group to the Poincaré-de Sitter group (ISO(4; 1)). This leads us to introduce the concept of a pentamomentum and to take into account the renormalization of the DSR deformation parameter kappa. This allows the resolution of the "soccer ball problem" (definition of many-particle-states) and provides a physical interpretation of the non-commutativity and non-associativity of the addition the relativistic quadrimomentum.
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