LHC Predictions from a Tevatron Anomaly in the Top Quark Forward-Backward Asymmetry

Abstract

We examine the implications of the recent CDF measurement of the top-quark forward-backward asymmetry, focusing on a scenario with a new color octet vector boson at 1-3 TeV. We study several models, as well as a general effective field theory, and determine the parameter space which provides the best simultaneous fit to the CDF asymmetry, the Tevatron top pair production cross section, and the exclusion regions from LHC dijet resonance and contact interaction searches. Flavor constraints on these models are more subtle and less severe than the literature indicates. We find a large region of allowed parameter space at high axigluon mass and a smaller region at low mass; we match the latter to an SU(3)xSU(3)/SU(3) coset model with a heavy vector-like fermion. Our scenario produces discoverable effects at the LHC with only 1-2 inverse femtobarns of luminosity at 7-8 TeV. Lastly, we point out that a Tevatron measurement of the b-quark forward-backward asymmetry would be very helpful in characterizing the physics underlying the top-quark asymmetry.

35 pages, 10 figures, 4 tables

References in corpus (13)

• Parton distributions for the LHC
• Top-tagging: A Method for Identifying Boosted Hadronic Tops
• Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC
• First measurement of the forward-backward charge asymmetry in top quark pair production
• Delta F=2 Observables and Fine-Tuning in a Warped Extra Dimension with Custodial Protection
• Top pair invariant mass distribution: a window on new physics
• Colored Resonant Signals at the LHC: Largest Rate and Simplest Topology
• Top Quark Pairs at High Invariant Mass - A Model-Independent Discriminator of New Physics at the LHC
• Top production at the Tevatron/LHC and nonstandard, strongly interacting spin one particles
• Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC
• Search for ttbar resonances in the lepton plus jets final state in ppbar collisions at sqrt{s}=1.96TeV
• Chiral color symmetry and possible $G^{\prime }$-boson effects at the Tevatron and LHC
• On mass limit for chiral color symmetry $G^{\prime }$-boson from Tevatron data on $t\bar{t}$ production

Cited by in corpus (97)

• Probing the Tevatron t tbar asymmetry at LHC
• Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry
• Search for anomalous t t-bar production in the highly-boosted all-hadronic final state
• Top Quark Forward-Backward Asymmetry and Same-Sign Top Quark Pairs
• Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at sqrt(s) = 7 TeV
• The top-pair forward-backward asymmetry beyond NLO
• On Models of New Physics for the Tevatron Top A_FB
• Explaining the t-tbar asymmetry with a light axigluon
• Light Z' Bosons at the Tevatron
• Explaining the t tbar forward-backward asymmetry without dijet or flavor anomalies
• Massive Color-Octet Bosons: Bounds on Effects in Top-Quark Pair Production
• A Polarized View of the Top Asymmetry
• Asymmetries in t tbar production: LHC versus Tevatron
• Asymmetries in top quark pair production at hadron colliders
• Zero and one jet combined NLO analysis of the top quark forward-backward asymmetry
• Shaping the top asymmetry
• Stealth gluons at hadron colliders
• Simple models for the top asymmetry: constraints and predictions
• Review of new physics effects in t-tbar production
• Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies
• Single Vectorlike Quark Production at the LHC
• Discerning New Physics in Top-Antitop Production using Top Spin Observables at Hadron Colliders
• Top-flavored dark matter and the forward-backward asymmetry
• Top quark forward-backward asymmetry at Tevatron and its implications at the LHC
• Search for same-sign top-quark pair production at sqrt(s) = 7 TeV and limits on flavour changing neutral currents in the top sector
• Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
• Searching for Top Flavor Violating Resonances
• Implications of the CDF t\bar{t} Forward-Backward Asymmetry for Boosted Top Physics
• Search for resonant t t-bar production in lepton+jets events in pp collisions at sqrt(s) = 7 TeV
• Boosting the t tbar charge asymmetry
• Flavor Symmetric Sectors and Collider Physics
• Implications of the CDF t \bar t Forward-Backward Asymmetry for Hard Top Physics
• $A_{FB}^t$ Meets LHC
• Top condensation as a motivated explanation of the top forward-backward asymmetry
• LHC diphoton Higgs signal and top quark forward-backward asymmetry in quasi-inert Higgs doublet model
• The Axigluon, a Four-Site Model and the Top Quark Forward-Backward Asymmetry at the Tevatron
• Search for Resonant Top-antitop Production in the Semi-leptonic Decay Mode Using the Full CDF Data Set
• Testing new physics models by top charge asymmetry and polarization at the LHC
• Effective axial-vector coupling of gluon as an explanation to the top quark asymmetry
• Resolving the Flavor Structure in the MFV-SMEFT
• Collider-independent t tbar forward-backward asymmetries
• A Flavorful Top-Coloron Model
• The Top Forward Backward Asymmetry with general Z ' couplings
• Gluon excitations in t tbar production at hadron colliders
• A Revisit to Top Quark Forward-Backward Asymmetry
• Discriminating Top-Antitop Resonances using Azimuthal Decay Correlations
• Tevatron Top $A_{FB}$ Versus LHC Top Physics
• Four tops and the t tbar forward-backward asymmetry
• Reconstructing the heavy resonance at hadron colliders
• Data driving the top quark forward--backward asymmetry with a lepton-based handle
• A charged Z' to conciliate the apparent disagreement between top-antitop Tevatron forward-backward asymmetry and LHC charge asymmetry
• Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at $\sqrt{s}=$ 13 TeV
• Top quark forward-backward asymmetry from SU(N_c) color
• Very Light Axigluons and the Top Asymmetry
• Transverse Top Quark Polarization and the ttbar Forward-Backward Asymmetry
• Identifying the colour of TeV-scale resonances
• Spinning the Top
• Top quark forward-backward asymmetry and charge asymmetry in left-right twin Higgs model
• Diagnosing the top-quark angular asymmetry using LHC intrinsic charge asymmetries
• Bottom-Quark Forward-Backward Asymmetry in the Standard Model and Beyond
• Top Quark Pair Production and Asymmetry at the Tevatron and LHC in Left-Right Models
• The Color Discriminant Variable and Scalar Diquarks at the LHC
• Collider-independent top quark forward-backward asymmetries: standard model predictions
• Distinguishing Color-Octet and Color-Singlet Resonances at the Large Hadron Collider
• Beauty-quark and charm-quark pair production asymmetries at LHCb
• Bottom-Quark Forward-Backward and Charge Asymmetries at Hadron Colliders
• Top quark forward-backward asymmetry and W^prime bosons
• Top Pair Forward-Backward Asymmetry from Loops of New Strongly Coupled Quarks
• New color-octet axial vector boson revisited
• A hybrid 4${}^{\text{th}}$ generation: Technicolor with top-seesaw
• Interpretations and Implications of the Top Quark Rapidity Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell }$
• Distinguishing Flavor Non-universal Colorons from Z' Bosons at the LHC
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences
• Comment on measuring the t-tbar forward-backward asymmetry at ATLAS and CMS
• Quantum coherence, top transverse polarisation and the Tevatron asymmetry $A_{FB}^{\ell }$
• Dijet resonances, widths and all that
• Precise QCD predictions on top quark pair production mediated by massive color octet vector boson at hadron colliders
• Portrait of a colour octet
• Measuring the Bottom-Quark Forward-Central Asymmetry at the LHC
• Probing Color Octet Couplings at the Large Hadron Collider
• Top quark physics in the Vector Color-Octet Model
• Constraining flavoured contact interactions at the LHC
• Asymmetric heavy-quark hadroproduction at LHCb: Predictions and applications
• R-Parity Violating Supersymmetry Explanation for Large t tbar Forward-Backward Asymmetry
• Anomalous Wtb coupling and forward-backward asymmetry of top quark production at the Tevatron
• Implications of effective axial-vector coupling of gluon for $t\bar{t}$ spin polarizations at the LHC
• Light axigluon and single top production at the LHC
• Summary of Lepton Photon 2011
• Top quark forward-backward asymmetry in R-parity violating supersymmetry
• Constraining Unparticles from Top Physics at TeVatron
• One-loop Helicity Amplitudes for Top Quark Pair Production in Randall-Sundrum Model
• Measurements of the Production, Decay and Properties of the Top Quark: A Review
• Collider constraints and new tests of color octet vectors
• Parity Nonconservation in Strong Interactions
• Top-quark forward-backward asymmetry from a color-octet t-channel resonance
• Colored bosons on top FBA and angular cross section for $t\bar{t}$ production
• Constraining parameter space of the Little Higgs model by data of tera-Z factory and ILC