We outline the evaluation of the cosmological constant in the framework of the standard field-theoretical treatment of vacuum energy and discuss the relation between the vacuum energy problem and the gauge-group spontaneous symmetry breaking. We suggest possible extensions of the 't Hooft–Nobbenhuis symmetry, in particular, its complexification till duality symmetry and discuss the compatible implementation on gravity. We propose to use the discrete time-reflection transform to formulate a framework in which one can eliminate the huge contributions of vacuum energy into the effective cosmological constant and suggest that the breaking of time-reflection symmetry could be responsible for a small observable value of this constant.
A.A. Andrianov, F. Cannata, P. Giacconi, A.Y. Kamenshchik, R. Soldati (2007). Symmetries and the cosmological constant puzzle. PHYSICS LETTERS. SECTION B, 651, 306-312 [10.1016/j.physletb.2007.06.040].
Symmetries and the cosmological constant puzzle
KAMENCHTCHIK, ALEXANDR;SOLDATI, ROBERTO
2007
Abstract
We outline the evaluation of the cosmological constant in the framework of the standard field-theoretical treatment of vacuum energy and discuss the relation between the vacuum energy problem and the gauge-group spontaneous symmetry breaking. We suggest possible extensions of the 't Hooft–Nobbenhuis symmetry, in particular, its complexification till duality symmetry and discuss the compatible implementation on gravity. We propose to use the discrete time-reflection transform to formulate a framework in which one can eliminate the huge contributions of vacuum energy into the effective cosmological constant and suggest that the breaking of time-reflection symmetry could be responsible for a small observable value of this constant.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
