No like-sign tops at Tevatron: Constraints on extended models and implications for the t tbar asymmetry

Abstract

We use a recent upper limit from CDF on like-sign top pair production to place constraints on general new vector bosons and scalars mediating u u -> t t. The possible vector bosons comprise neutral colour singlets or octets, and charge 4/3 colour triplets or sextets, whereas the new scalars can be neutral colour singlets or octets and charge 4/3 colour sextets. We also estimate the expected bounds from like-sign top pair production at LHC in the near future. Then, we address the implications of these limits for the forward-backward asymmetry in t tbar production measured at Tevatron. In particular, we find that models explaining the observed asymmetry by the exchange of a single t-channel heavy Z' boson are already excluded. On the other hand, light Z' bosons with a mass M_Z' ~ 150 GeV, which could also account for a recent CDF dijet excess in W+jet production, are barely allowed.

LaTeX 17 pages. Additional references and comments, matching PLB version

References in corpus (18)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Flavor Changing Effects in Theories with a Heavy Z' Boson with Family Non-Universal Couplings
• Phenomenology of Two Higgs Doublet Models with Flavor Changing Neutral Currents
• Effective-Field-Theory Approach to Top-Quark Production and Decay
• Top quark forward-backward asymmetry from new t-channel physics
• Electroweak Limits on General New Vector Bosons
• Non-resonant New Physics in Top Pair Production at Hadron Colliders
• Invariant Mass Distribution of Jet Pairs Produced in Association with a W boson in ppbar Collisions at sqrt(s) = 1.96 TeV
• Effective four-fermion operators in top physics: a roadmap
• Probing the Tevatron t tbar asymmetry at LHC
• Top Quark Forward-Backward Asymmetry and Same-Sign Top Quark Pairs
• Model independent analysis of the forward-backward asymmetry of top quark production at the Tevatron
• Top quark forward-backward asymmetry at the Tevatron: a comparative study in different new physics models
• Color Sextet Scalars in Early LHC Experiments
• Supermodels for early LHC
• Color Sextet Vector Bosons and Same-Sign Top Quark Pairs at the LHC
• Search for Maximal Flavor Violating Scalars in Same-Charge Lepton Pairs in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV

Cited by in corpus (63)

• Observable Effects of General New Scalar Particles
• An Effective Z'
• A Polarized View of the Top Asymmetry
• Analysis of events with $b$-jets and a pair of leptons of the same charge in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Asymmetries in t tbar production: LHC versus Tevatron
• Asymmetries in top quark pair production at hadron colliders
• Simple models for the top asymmetry: constraints and predictions
• Discerning New Physics in Top-Antitop Production using Top Spin Observables at Hadron Colliders
• Top-flavored dark matter and the forward-backward asymmetry
• Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
• Search for same-sign top-quark production and fourth-generation down-type quarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Boosting the t tbar charge asymmetry
• Scalar-mediated $t\bar{t}$ forward-backward asymmetry
• Search for anomalous production of prompt like-sign muon pairs and constraints on physics beyond the Standard Model with the ATLAS detector
• Relating direct CP violation in D decays and the forward-backward asymmetry in $t\bar{t}$ production
• Quirks at the Tevatron and Beyond
• An effective approach to same sign top pair production at the LHC and the forward-backward asymmetry at the Tevatron
• Top condensation as a motivated explanation of the top forward-backward asymmetry
• Testing new physics models by top charge asymmetry and polarization at the LHC
• Z'-gauge Bosons as Harbingers of Low Mass Strings
• Exploring top quark FCNC within 2HDM type III in association with flavor physics
• Constraining the flavor changing Higgs couplings to the top-quark at the LHC
• Chiral U(1) flavor models and flavored Higgs doublets: the top FB asymmetry and the Wjj
• Collider-independent t tbar forward-backward asymmetries
• The Top Forward Backward Asymmetry with general Z ' couplings
• Gluon excitations in t tbar production at hadron colliders
• Top quark asymmetry and dijet resonances
• A charged Z' to conciliate the apparent disagreement between top-antitop Tevatron forward-backward asymmetry and LHC charge asymmetry
• Top A_FB at the Tevatron vs. charge asymmetry at the LHC in chiral U(1) flavor models with flavored Higgs doublets
• Search for anomalous production of prompt like-sign lepton pairs at sqrt(s) = 7 TeV with the ATLAS detector
• Probing topcolor-assisted technicolor from top charge asymmetry and triple-top production at the LHC
• Possible Common Origin of the Top Forward-backward Asymmetry and the CDF Dijet Resonance
• Model independent analysis of top quark forward-backward asymmetry at the Tevatron up to $\mathcal{O}(\as^2/Λ^2)$
• Top quark forward-backward asymmetry and charge asymmetry in left-right twin Higgs model
• Perturbative unitarity constraints on general W' models and collider implications
• Dijet resonance from leptophobic Z' and light baryonic cold dark matter
• Collider-independent top quark forward-backward asymmetries: standard model predictions
• Top couplings and top partners
• Top quark forward-backward asymmetry and W^prime bosons
• New color-octet axial vector boson revisited
• Same-sign Tops: A Powerful Diagnostic Test for Models of New Physics
• Next-to-leading order QCD effect of $W^{\prime }$ on top quark Forward-Backward Asymmetry
• Interpretations and Implications of the Top Quark Rapidity Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell }$
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences
• Impact of extra particles on indirect Z' limits
• New physics contributions to the forward-backward asymmetry at the Tevatron
• From Tevatron's top and lepton-based asymmetries to the LHC
• A light charged Higgs boson in two-Higgs doublet model for CDF $Wjj$ anomaly
• Top Quark Forward-Backward Asymmetry and Anomalous Right-Handed Charge Currents
• Two-Higgs-doublet model with a color-triplet scalar: a joint explanation for top quark forward-backward asymmetry and Higgs decay to diphoton
• Measuring the Bottom-Quark Forward-Central Asymmetry at the LHC
• R parity violating supersymmetric explanation for the CDF Wjj excess
• NLO QCD corrections to tW' and tZ' production in forward-backward asymmetry models
• The Forward-Backward Top Asymmetry in a Singlet extension of the MSSM
• What the top asymmetries tell us about single top production and Higgs decays
• Implications of effective axial-vector coupling of gluon for $t\bar{t}$ spin polarizations at the LHC
• Constraining Unparticles from Top Physics at TeVatron
• Dissecting the Wjj Anomaly: Diagnostic Tests of a Leptophobic Z'
• Tevatron Top Quark Forward-Backward Asymmetry -- Implications for Same-sign Top Quark Pair Production
• Multi-Higgs doublet models with local $U(1{)}_H$ gauge symmetry and neutrino physics therein
• Top-quark forward-backward asymmetry from a color-octet t-channel resonance
• Anomaly Puzzle, Curved-Spacetime Spinor Hamiltonian, and String Phenomenology
• Top Forward-backward asymmetry at the Tevatron vs. Charge asymmetry at the LHC in chiral $U(1{)}^{\prime }$ models with flavored Higgs fields