Effective Action, Conformal Anomaly and the Issue of Quadratic Divergences

MPI für Gravitationsphysik / Quantum Gravity and Unified Theories
Effective Action, Conformal Anomaly and the Issue of Quadratic Divergences
Authors:	Canals Gustavo A.
Date of Publication (YYYY-MM-DD):	2008-02
Title of Journal:	Physics Letters B
Volume:	660
Issue / Number:	3
Start Page:	260
End Page:	266
Review Status:	not specified
Abstract / Description:	For massless $\phi^4$ theory, we explicitly compute the lowest order non-local contributions to the one-loop effective action required for the determination of the trace anomaly. Imposing exact conformal invariance of the local part of the effective action, we argue that the issue of quadratic divergences does not arise in a theory where exact conformal symmetry is only broken by quantum effects. Conformal symmetry can thus replace low energy supersymmetry as a possible guide towards stabilizing the weak scale and solving the hierarchy problem, if there are no intermediate scales between the weak scale and the Planck scale.
External Publication Status:	published
Document Type:	Article
Communicated by:	Hermann Nicolai
Affiliations:	MPI für Gravitationsphysik/Quantum Gravity and Unified Theories
Identifiers:	LOCALID:arXiv:0710.7560v1 ISSN:0370-2693 DOI:10.1016/j.physletb.2008.05.035
Full Text: You have privileges to view the following file(s): [171,00 Kb] [Comment:arXiv:0710.2840v1] Canals Gustavo Adolfo Dr.Física Teórica; Ph.D.math. MPI für Gravitationsphysik adolfocanals@educ.ar