Composite Scalars at LEP: Constraining Technicolor Theories

Abstract

LEPI and LEPII data can be used to constrain technicolor models with light, neutral pseudo-Nambu-Goldstone bosons, Pa. We use published limits on branching ratios and cross sections for final states with photons, large missing energy, jet pairs, and b bbar pairs to constrain the anomalous Pa Z0 Z0, Pa Z0 photon, and Pa photon photon couplings. From these results, we derive bounds on the size of the technicolor gauge group and the number of technifermion doublets in models such as Low-scale Technicolor.

27 pages (including title page), 15 figures, 6 tables. version 2: In addressing PRD referee comments, we have significantly expanded our manuscript, to include detailed discussion of limits from LEP II data, as well as expanding the number or specific models to which we apply our results. As a result, we have changed the title from "Z0 decays to composite scalars: constraining technicolor theories"

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• Physics Impact of GigaZ
• Photon Events with Missing Energy at sqrt(s) = 183 to 189 GeV
• Technihadron Production and Decay in Low-Scale Technicolor
• Multi-photon production in e+e- collisions at sqrt(s)= 189 geV
• Search for a Higgs Boson Decaying into Two Photons in e+e- Interactions at sqrt{s}=189GeV
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Cited by in corpus (8)

• Strong Dynamics and Electroweak Symmetry Breaking
• The Collider Phenomenology of Technihadrons in the Technicolor Straw Man Model
• Technipion Limits from LHC Higgs Searches
• Production of the top-pions at the THERA collider based $\gamma p$ collisions
• The Meaning of Higgs: tau^+ tau^- and gamma gamma at the Tevatron and the LHC
• Technicolor Assisted Leptogenesis with an Ultra-Heavy Higgs Doublet
• Resonant and Non-Resonant Effects in Photon-Technipion Production at Lepton Colliders
• Neutral Pion-like Resonances at Photon Colliders