Zeros of the W_L Z_L -> W_L Z_L amplitude: where vector resonances stand
arXiv:1205.4682 · doi:10.1007/JHEP08(2012)080
Abstract
A Higgsless electroweak theory may be populated by spin-1 resonances around E ~ 1TeV as a consequence of a new strong interacting sector, frequently proposed as a tool to smear the high-energy behaviour of scattering amplitudes, for instance, elastic gauge boson scattering. Information on those resonances, if they exist, must be contained in the low-energy couplings of the electroweak chiral effective theory. Using the facts that: i) the scattering of longitudinal gauge bosons, W_L, Z_L, can be well described in the high-energy region E >> M_W by the scattering of the corresponding Goldstone bosons (equivalence theorem) and ii) the zeros of the scattering amplitude carry the information on the heavier spectrum that has been integrated out; we employ the O(p^4) electroweak chiral Lagrangian to identify the parameter space region of the low-energy couplings where vector resonances may arise. An estimate of their masses is also provided by our method.
10 pages, 4 figures
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Cited by in corpus (7)
- Viability of strongly-coupled scenarios with a light Higgs-like boson
- Oblique S and T Constraints on Electroweak Strongly-Coupled Models with a Light Higgs
- Unitarity and causality constraints in composite Higgs models
- Colorful Imprints of Heavy States in the Electroweak Effective Theory
- Interpreting a 2 TeV resonance in WW scattering
- A bottom-up approach within the electroweak effective theory: constraining heavy resonances
- Zeros of the amplitude: With or without a light Higgs