Vacuum fluctuations of the supersymmetric field in curved background
Autor: | Bilic, Neven, Domazet, Silvije, Guberina, Branko |
---|---|
Rok vydání: | 2011 |
Předmět: | |
Zdroj: | Physics Letters B 707 (2012) 221-227 |
Druh dokumentu: | Working Paper |
DOI: | 10.1016/j.physletb.2011.12.025 |
Popis: | We study a supersymmetric model in curved background spacetime. We calculate the effective action and the vacuum expectation value of the energy momentum tensor using a covariant regularization procedure. A soft supersymmetry breaking induces a nonzero contribution to the vacuum energy density and pressure. Assuming the presence of a cosmic fluid in addition to the vacuum fluctuations of the supersymmetric field an effective equation of state is derived in a self-consistent approach at one loop order. The net effect of the vacuum fluctuations of the supersymmetric fields in the leading adiabatic order is a renormalization of the Newton and cosmological constants. Comment: 14 pages, references added, revised argument on vacuum energy subtraction in section 1, discussion expanded, results unchanged |
Databáze: | arXiv |
Externí odkaz: |