Gluon excitations in t tbar production at hadron colliders
arXiv:1105.3333 · doi:10.1103/PhysRevD.84.014024
Abstract
We argue that a relatively light massive gluon with mass <= 1 TeV, small purely axial couplings to light quarks and sizable vector and axial couplings to the top quark can reproduce the large forward-backward asymmetry observed at the Tevatron without conflicting with the t tbar and the dijet invariant mass distributions measured at the Tevatron and the LHC. We show that realistic Higgsless models with warped extra dimensions naturally fulfil all the necessary ingredients to realize this scenario. While current data is unable to discover or exclude these heavy gluons with masses 850 GeV, they should be observed at the (7 TeV) LHC with a luminosity of the order of 300 pb^{-1}.
16 pages, 6 figures
References in corpus (16)
- PYTHIA 6.4 Physics and Manual
- First measurement of the forward-backward charge asymmetry in top quark pair production
- Top Quarks, Axigluons and Charge Asymmetries at Hadron Colliders
- Constraining heavy colored resonances from top-antitop quark events
- Probing the Tevatron t tbar asymmetry at LHC
- A New Custodian for a Realistic Higgsless Model
- Collider Phenomenology of Gauge-Higgs Unification Scenarios in Warped Extra Dimensions
- Axigluons cannot explain the observed top quark forward-backward asymmetry
- Top production at the Tevatron/LHC and nonstandard, strongly interacting spin one particles
- No like-sign tops at Tevatron: Constraints on extended models and implications for the t tbar asymmetry
- Top-Quark Forward-Backward Asymmetry in Randall-Sundrum Models Beyond the Leading Order
- One-Loop Corrections to the S and T Parameters in a Three Site Higgsless Model
- New Strongly Coupled Sector at the Tevatron and the LHC
- The Three Site Model at One-Loop
- Chiral-logarithmic Corrections to the S and T Parameters in Higgsless Models
- Z to b bbar and Chiral Currents in Higgsless Models