Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8192131 | Physics Letters B | 2011 | 4 Pages |
Abstract
We consider mass-deformed conformal gauge theories (mCGT) and investigate the scaling behaviour of hadronic observables as a function of the fermion mass. Applying renormalization group arguments directly to matrix elements, we find mHâ¼m1/(1+γâ) and Fâ¼mηF(γâ) for given ηF(γâ), for the hadronic masses and the decay constants respectively, thereby generalizing our results from a previous paper to the entire spectrum. Applying the Hellmann-Feynman theorem to the trace anomaly we obtain the hadron mass scaling independent of renormalization group arguments. From the trace anomaly we obtain a relation reminiscent of the Gell-Mann-Oakes-Renner relation in QCD. Using the new results we discuss the scaling of the S-parameter inside the conformal window. Finally, we discuss how spectral representations can be used to relate the mass and decay constant trajectories.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Luigi Del Debbio, Roman Zwicky,