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  Effective Action, Conformal Anomaly and the Issue of Quadratic Divergences

Meissner, K. A., & Nicolai, H. (2008). Effective Action, Conformal Anomaly and the Issue of Quadratic Divergences. Physics Letters B, 660(3).

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PhyLetB66-3-260.pdf (Publisher version), 158KB
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Meissner, Krzysztof A.1, Author
Nicolai, Hermann2, Author
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1External Organizations, , , ou_persistent22              
2Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24014              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2008-02
 Publication Status: Issued
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Title: Physics Letters B
Source Genre: Journal
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Pages: - Volume / Issue: 660 (3) Sequence Number: - Start / End Page: - Identifier: ISSN: 0370-2693
DOI: 10.1016/j.physletb.2007.12.035
eDoc: 321602