Stabilizing the gravitational action and Coleman's solution to the cosmological constant problem

Alberto Carlini, Maurizio Martellini

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

We use the fifth-time action formalism introduced by Halpern and Greensite to stabilize the unbounded euclidean 4D gravity in two simple minisuperspace models. In particular, we show that, at the semiclassical level (h {combining short solidus overlay}→0), we still have as a leading saddle point the S4 solution and the Coleman peak at zero cosmological constant, for a fixed De Witt supermetric. At the quantum (one-loop) level the scalar gravitational modes give a positive semidefinite hessian contribution to the 5D partition function, thus removing the Polchinski phase ambiguity.

Lingua originaleInglese
pagine (da-a)36-40
Numero di pagine5
RivistaPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume276
Numero di pubblicazione1-2
DOI
Stato di pubblicazionePubblicato - 6 feb 1992
Pubblicato esternamente

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