Physics – High Energy Physics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1206..170n&link_type=abstract
ASTROPHYSICS AND COSMOLOGY AFTER GAMOW: Proceedings of the 4th Gamow International Conference on Astrophysics and Cosmology Afte
Physics
High Energy Physics
General Relativity, Yang-Mills Theory, Universe, Classical General Relativity, Unified Field Theories And Models, Particle-Theory And Field-Theory Models Of The Early Universe
Scientific paper
Modifications of general relativity have been considered as one of the possible ways of addressing some of the outstanding problems related to the large scale gravitational physics. In this contribution we review some of the recent results which are due to the inclusion of dynamical torsion. More specifically we shall discuss the propagation of massive spin-2 particles in flat and curved space times. We shall show that, contrary to what is generally believed, spinning matter is not the sole source of torsion field. A symmetric energy momentum tensor can also couple to torsion degrees of freedom. The massive and massless spin-2 particles mix giving rise to an infrared modification of gravity.
Nair V. P.
Nikiforova V.
Randjbar-Daemi Seif
Rubakov Valery
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