If no Higgs then what?

A. Falkowski, C. Grojean, A. Kamińska, S. Pokorski, A. Weiler

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


In the absence of a Higgs boson, the perturbative description of the Standard Model ceases to make sense above a TeV. Heavy spin-1 fields coupled to W and Z bosons can extend the validity of the theory up to higher scales. We carefully identify regions of parameter space where a minimal addition - a single spin-1 SU(2)custodial-triplet resonance - allows one to retain perturbative control in all channels. Elastic scattering of longitudinal W and Z bosons alone seems to permit a very large cut-off beyond the Naïve Dimensional Analysis expectation. We find however that including scattering of the spin-1 resonances then leads to an earlier onset of strong coupling. Most importantly for LHC searches, we define a self-consistent set-up with a well-defined range of validity without recourse to unitarization schemes whose physical meaning is obscure. We discuss the LHC phenomenology and the discovery reach for these electroweak resonances and mention the possibility of a nightmare scenario with no Higgs nor resonance within the LHC reach. Finally, we discuss the effects of parity breaking in the heavy resonance sector which reduces the contributions to the S parameter.

Original languageEnglish
Article number028
JournalJournal of High Energy Physics
Issue number11
StatePublished - 2011
Externally publishedYes


  • Chiral lagrangians
  • Hadronic colliders
  • Technicolor and composite models


Dive into the research topics of 'If no Higgs then what?'. Together they form a unique fingerprint.

Cite this