A Higgs Impostor in Low-Scale Technicolor

Abstract

We propose a "Higgs impostor" model for the 125 GeV boson, $X$, recently discovered at the LHC. It is a technipion, ${\eta }_T$, with $I^G{J}^{PC}=0^{-}{0}^{-+}$ expected in this mass region in low-scale technicolor. Its coupling to pairs of standard-model gauge bosons are dimension-five operators whose strengths are determined within the model. It is easy for the gluon fusion rate $\sigma B(gg\to {\eta }_T\to \gamma \gamma )$ to agree with the measured one, but ${\eta }_T\to Z{Z}^{\ast },W{W}^{\ast }$ are greatly suppressed relative to the standard-model Higgs rates. This is a crucial test of our proposal. In this regard, we assess the most recent data on $X$ decay modes, with a critical discussion of $X\to Z{Z}^{\ast }\to 4\ell$. In our model the ${\eta }_T$ mixes almost completely with the isovector ${\pi }_T^0$, giving two similar states, ${\eta }_L$ at 125 Gev and ${\eta }_H$ higher, possibly in the range 170--190 Gev. Important consequences of this mixing are (1) the only associated production of et al is via $\to \to W{\eta }_L$, and this could be sizable; (2) ${\eta }_H$ may soon be accessible in $gg\to {\eta }_H\to \gamma \gamma$; and (3) LSTC phenomenology at the LHC is substantially modified.

25 pages, 9 figures, references added. Our discussion of the 125 GeV boson discovered at CERN is updated to include the latest ATLAS and CMS data. We critically examine the crucial ZZ* -> 4l data and argue that it does not justify identifying this boson as a Higgs. In addition, several minor corrections have been made

References in corpus (32)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Topcolor Assisted Technicolor
• Light scalar at LHC: the Higgs or the dilaton?
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• Light Composite Higgs from Higher Representations versus Electroweak Precision Measurements -- Predictions for LHC
• Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron
• A Higgslike Dilaton
• Invariant Mass Distribution of Jet Pairs Produced in Association with a W boson in ppbar Collisions at sqrt(s) = 1.96 TeV
• Search for signatures of extra dimensions in the diphoton mass spectrum at the Large Hadron Collider
• Could the excess seen at 124-126 GeV be due to the Randall-Sundrum Radion?
• Search for high-mass resonances decaying to dilepton final states in pp collisions at a center-of-mass energy of 7 TeV with the ATLAS detector
• The Collider Phenomenology of Technihadrons in the Technicolor Straw Man Model
• Standard Model Gauging of the WZW Term: Anomalies, Global Currents and pseudo-Chern-Simons Interactions
• The decay constant of the holographic techni-dilaton and the 125 GeV boson
• Technicolor at the Tevatron
• Can the 126 GeV boson be a pseudoscalar?
• Discovering 125 GeV techni-dilaton at LHC
• Singlet scalars as Higgs imposters at the Large Hadron Collider
• Techni-dilaton at 125 GeV
• Is the LHC Observing the Pseudo-scalar State of a Two-Higgs Doublet Model ?
• Search for the standard model Higgs boson decaying to a bb pair in events with one charged lepton and large missing transverse energy using the full CDF data set
• Search for a W' or techni-rho decaying into WZ in pp collisions at sqrt(s) = 7 TeV
• An Effective Lagrangian for Low-Scale Technicolor
• Study of the dijet mass spectrum in pp to W + jets events at sqrt(s) = 7 TeV
• Discovering Strong Top Dynamics at the LHC
• A Light Scalar in Low-Scale Technicolor
• A pseudoscalar at the LHC: technicolor vs a fourth family
• Testing the Technicolor Interpretation of the CDF Dijet Excess at the 8-TeV LHC
• Discovering a Light Scalar or Pseudoscalar at The Large Hadron Collider

Cited by in corpus (10)

• The Dilaton Potential and Lattice Data
• Multiscale confining dynamics from holographic RG flows
• Towards top-down holographic composite Higgs: minimal coset from maximal supergravity
• The Coulomb branch of N=4 SYM and dilatonic scions in supergravity
• The Quark-Level Linear σ Model
• Dilatonic states near holographic phase transitions
• Glueball Spectrum in a Gauge Theory with Two Dynamical Scales
• Dimuon enhancement at 28 GeV and tentative (pseudo)scalar partner of the Z boson at 57.5 GeV
• Quarkonium Resonance Model of the 125 GeV Boson
• Technicolor with Scalar Doublet After the Discovery of Higgs Boson