Unitarity Bounds for New Physics from Axial Coupling at LHC

Abstract

If a new massive vector boson with nonzero axial couplings to fermions will be observed at LHC, then an upper limit on the scale of new physics could be derived from unitarity of $\mathcal{S}$-matrix. The new physics will involve either new massive fermions, or scalars, or even a strongly coupled sector. We derive a model independent bound on the scale of new physics. If $M_G/g_A<3$ TeV and the fermion is a top quark, the upper limit is 78 TeV.

7 pages, 6 figures

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Cited by in corpus (7)

• Implications of unitarity and gauge invariance for simplified dark matter models
• Review of new physics effects in t-tbar production
• Searching for Secluded Dark Matter with H.E.S.S., Fermi-LAT, and Planck
• The Dark Sequential Z' Portal: Collider and Direct Detection Experiments
• Perturbative unitarity constraints on general W' models and collider implications
• How heavy can dark matter be? Constraining colourful unitarity with SARAH
• Properties of the Top Quark