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