a New Conformal Window Bound from the a theorem

Preprint number: CP3-Origins-2013-4 DNRF90 and DIAS-2013-4
Authors: Oleg Antipin (CP3-Origins & DIAS), Marc Gillioz (CP3-Origins & DIAS), and Francesco Sannino (CP3-Origins & DIAS)
External link: arXiv.org

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We propose a novel constraint on the gauge dynamics of strongly interacting gauge theories stemming from the a theorem. The inequality we suggest is used to provide a lower bound on the conformal window of four dimensional gauge theories.