Color Unifed Dynamical Axion

Abstract

We consider an enlarged color sector which solves the strong CP problem via new massless fermions. The spontaneous breaking of a unified color group into QCD and another confining group provides a source of naturally large axion mass $m_a$ due to small size instantons. This extra source of axion mass respects automatically the alignment of the vacuum, ensuring a low-energy CP-conserving vacuum. The mechanism does not appeal to a $Z_2$ 'mirror' copy of the SM, nor does it require any fine-tuning of the axion-related couplings at the unification scale. There is no light axion and uncharacteristically the lighter spectrum contains instead sterile fermions. The axion scale $f_a$ can be naturally brought down to a few TeV, with an exotic spectrum of colored pseudoscalars lighter than this scale, observable at colliders exclusively via strong interactions. The $\{m_a,f_a\}$ parameter space which allows a solution of the strong CP problem is thus enlarged well beyond that of invisible axion models.

31 pages and 6 figures

References in corpus (19)

• Planck-Scale Physics and the Peccei-Quinn Mechanism
• Solutions to the strong CP problem in a world with gravity
• Strong CP problem and mirror world: the Weinberg Wilczek axion revisited
• Grand unification and heavy axion
• Anomalous solutions to the strong CP problem
• Factoring the Strong CP Problem
• A Model of Visible QCD Axion
• A Visible QCD Axion from an Enlarged Color Group
• IS THERE A DOMAIN WALL PROBLEM?
• Composite Accidental Axions
• The strong CP problem versus Planck scale physics
• Di-boson signatures as Standard Candles for Partial Compositeness
• Sgluon Pair Production to Next-to-Leading Order
• Electroweak instantons/sphalerons at VLHC?
• 750 GeV diphoton resonance in a visible heavy QCD axion model
• New Solutions to the Strong CP Problem
• Automated next-to-leading order predictions for new physics at the LHC: the case of colored scalar pair production
• Instanton Effects in Three Flavor QCD
• The Axion Mass in Modular Invariant Supergravity

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