Vector Resonances from a Strong Electroweak Sector at Linear Colliders

Abstract

We explore the usefulness of very energetic linear $e^{+}{e}^{-}$ colliders in the $TeV$ range in studying an alternative scheme of electroweak symmetry breaking based on a strong interacting sector. The calculations are performed within the BESS model which contains new vector resonances. If the mass $M_V$ of the new boson multiplet lies not far from the maximum machine energy, or if it is lower, such a resonant contribution would be quite manifest. A result of our analysis is that also virtual effects are important. It appears that annihilation into a fermion pair in such machines, at the considered luminosities, would improve only marginally on existing limits if polarized beams are available and left-right asymmetries are measured. On the other hand, the process of $W$-pair production by $e^{+}{e}^{-}$ annihilation would allow for sensitive tests of the hypothesized strong sector, especially if the $W$ polarizations are reconstructed from their decay distributions, and the more so the higher the energy of the machine. An $e^{+}{e}^{-}$ collider with c.m. energy $\sqrt{s}=500GeV$ could improve the limits on the model for the range $500<M_V(GeV)<1000$ when $W$ polarization is not reconstructed. If $W$ polarizations are reconstructed, then the bounds improve for the entire expected range of $M_V$. These bounds become more stringent for larger energy of the collider. We have also studied the detectability of the new resonances through the fusion subprocesses, but this channel does not seem to be interesting even for a collider with a c.m. energy $\sqrt{s}=2TeV$.

21 pages, 13 figures (not included, but available on request), TeX, UGVA-DPT 1993/02-805, February 1993

Cited by in corpus (16)

• Strong Dynamics and Electroweak Symmetry Breaking
• The Phenomenology of Extra Neutral Gauge Bosons
• Degenerate BESS Model: The possibility of a low energy strong electroweak sector
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• Low Energy Effective Lagrangian of the Bess Model
• Tests for a Strong Electroweak Sector at Future e^+e^- High Energy Colliders
• Higgs Boson Phenomenology in a Simple Model with Vector Resonances
• Indirect effects of new resonances at future linear colliders
• Observing the technieta at a photon linear collider
• Lepton Spectra from e^+ e^- \to W^+ W^- in the BESS model
• Top-BESS model and its phenomenology
• Pseudo Goldstones at Future Colliders from the Extended Bess Model
• An alternative model for the electroweak symmetry breaking sector and its signature in future e-gamma colliders
• Energy Spectrum of Leptons from $e^{+}{e}^{-}\to W^{+}{W}^{-}$ in the Presence of Strong W^+_LW^-_L Interaction
• Sum rules for asymptotic form factors in $e^{+}{e}^{-}->W^{+}{W}^{-}$ scattering
• Multi-boson splashes at future colliders from electroweak compositeness