We consider a scalar-metric gauge theory of gravity with an independent, metric, connection, and dilaton. The role of the dilaton is to provide the scale of all masses, via its vacuum expectation value. In this theory, we study the renormalization-group flow of the dilaton potential, taking into account threshold effects at the Planck scale. Because of the running of the VEV of the dilaton all particles that would naively seem to have masses larger than Planck's mass may actually not propagate. This could solve the problem of unitarity in these theories. © 1995 The American Physical Society.
Renormalization-group flow of the dilaton potential / Floreanini, R; Percacci, Roberto. - In: PHYSICAL REVIEW D. - ISSN 0556-2821. - 52:2(1995), pp. 896-911. [10.1103/PhysRevD.52.896]
Renormalization-group flow of the dilaton potential
Percacci, Roberto
1995-01-01
Abstract
We consider a scalar-metric gauge theory of gravity with an independent, metric, connection, and dilaton. The role of the dilaton is to provide the scale of all masses, via its vacuum expectation value. In this theory, we study the renormalization-group flow of the dilaton potential, taking into account threshold effects at the Planck scale. Because of the running of the VEV of the dilaton all particles that would naively seem to have masses larger than Planck's mass may actually not propagate. This could solve the problem of unitarity in these theories. © 1995 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
