Probing Topcolor-Assisted Technicolor from Like-sign Top Pair Production at LHC

Abstract

The topcolor-assisted technicolor (TC2) theory predicts tree-level flavor-changing neutral-current (FCNC) top quark Yukawa couplings with top-pions. Such FCNC interactions will induce like-sign top quark pair productions at CERN Large Hadron Collider (LHC). While these rare productions are far below the observable level in the Standard Model and other popular new physics models such as the Minimal Supersymmetric Model, we find that in a sound part of parameter space the TC2 model can enhance the production cross sections to several tens of fb and thus may be observable at the LHC due to rather low backgrounds. Searching for these productions at the LHC will serve as an excellent probe for the TC2 model.

10 pages, 6 figs

References in corpus (2)

• A Precision Measurement of the Mass of the Top Quark
• $t\to cV$ via SUSY FCNC couplings in the unconstrained MSSM

Cited by in corpus (26)

• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Top quark forward-backward asymmetry at the Tevatron: a comparative study in different new physics models
• Top quark forward-backward asymmetry, FCNC decays and like-sign pair production as a joint probe of new physics
• The "Top Priority" at the LHC
• Measurement of the charge asymmetry in dileptonic decays of top quark pairs in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector
• Top-quark FCNC Productions at LHC in Topcolor-assisted Technicolor Model
• R-parity violating effects in top quark FCNC productions at LHC
• Next-to-leading order QCD corrections to the single top quark production via model-independent t-q-g flavor-changing neutral-current couplings at hadron colliders
• Top quark FCNC decays and productions at LHC in littlest Higgs model with T-parity
• In search of an unbiased temperature estimator for statistically poor X-ray spectra
• Studying top quark decay into the polarized W-boson in the TC2 model
• The flavor-changing single-top quark production in the littlest Higgs model with T parity at the LHC
• Top-Quark FCNC Decay t->cgg in Topcolor-assisted Technicolor Model
• Associated production of the top-pions and single top at hadron colliders
• Next-to-leading order QCD corrections to the top quark associated with $\gamma$ production via model-independent flavor-changing neutral-current couplings at hadron colliders
• Top quark three-body decays in the R-parity violating MSSM
• Same-sign top pair production in an extra-dimension model of flavor at the CERN Large Hadron Collider
• Top quark decay t -> cb\bar{b} in topcolor-assisted technicolor models
• Same-sign top pair plus $W$ production in flavor changing vector and scalar models
• Single top or bottom production associated with a scalar in γp collision as a probe of topcolor-assisted technicolor
• Spontaneous CP Symmetry Breaking at the Electroweak Scale
• Single top production associated with a neutral scalar at LHC in topcolor-assisted technicolor
• PGB pair production at LHC and ILC as a probe of the topcolor-assisted technicolor models
• The flavor-changing bottom-strange quark production in the littlest Higgs model with T parity at the ILC
• Technicolor corrections to b\bar{b} -> W^{\pm}π^{\mp}_t at the CERN Large Hadron Collider
• The charged top-pion production associated with the bottom quark pair as a probe of the topcolor-assisted technicolor model at the LHC