Doubly-Special Relativity: Facts, Myths and Some Key Open IssuesReportar como inadecuado




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Dipartimento di Fisica, Università di Roma -La Sapienza- and Sez. Roma1 INFN, P.le A. Moro 2, 00185 Roma, Italy





Abstract I report, emphasizing some key open issues and some aspects that are particularly relevant for phenomenology, on the status of the development of -doubly-special- relativistic -DSR- theories with both an observer-independent high-velocity scale and an observer-independent small-length-large-momentum scale, possibly relevant for the Planck-scale-quantum-gravity realm. I also give a true-false characterization of the structure of these theories. In particular, I discuss a DSR scenario without modification of the energy-momentum dispersion relation and without the қ-Poincaré Hopf algebra, a scenario with deformed Poincaré symmetries which is not a DSR scenario, some scenarios with both an invariant length scale and an invariant velocity scale which are not DSR scenarios, and a DSR scenario in which it is easy to verify that some observable relativistic but non-special-relativistic features are insensitive to possible nonlinear redefinitions of symmetry generators.

Keywords: Poincaré symmetries; quantum spacetime; quantum gravity Poincaré symmetries; quantum spacetime; quantum gravity





Autor: Giovanni Amelino-Camelia

Fuente: http://mdpi.com/



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