2010/06/30 by Giovanni Amelino-Camelia, Marco Matassa, Flavio Mercati +1 · 3 citations
Physics and Astronomy · #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevlett.106.071301
published as Phys.Rev.Lett.106:071301,2011 · results generalized to 3+1D case; presentation streamlined
arxiv created 2012/02/17 · arxiv updated 2012/02/20
We report a general analysis of worldlines for theories with deformed relativistic symmetries and momentum dependence of the speed of photons. Our formalization is faithful to Einstein's program, with spacetime points viewed as an abstraction of physical events. The emerging picture imposes the renunciation of the idealization of absolutely coincident events, but is free from some pathologies which had been previously conjectured.