Sažetak sa skupa
Extra gauge symmetries in Poincaré gauge theory of gravity
M. Vasilić
; Department of Theoretical Physics, B. Kidrič Institute, Belgrade, Yugoslavia
Sažetak
The Poincaré gauge theory always contains a ten-parameter symmetry gauge group, but there can be some extra symmetries depending on the choice of the gravity Lagrangian. In this review I will analyse the theory with the gravity Lagrangian linear in the curvature and quadratic in the torsion (R + T²), which contains no other particles but the gravitation (1,2). In the theory with R² terms, however, there are propagating torsions and the existence of extra gauge symmetries is related to their masslessness. At the end of this review I will mention some results concerning the linearized R + T² + R³ (3,4).
Ključne riječi
Hrčak ID:
338801
URI
Datum izdavanja:
21.12.1986.
Posjeta: 196 *