Probing the Tevatron t tbar asymmetry at LHC

Abstract

We use an effective operator framework to study the contributions to the Tevatron t tbar asymmetry from arbitrary vector bosons and scalars, and compare with their effect on the t tbar tail at LHC. Our study shows, for example, that models reproducing the t tbar asymmetry by exchange of Z' and W' bosons or colour-triplet scalars lead to a large enhancement in the t tbar tail at LHC. This fact can be used to exclude these models as the sole explanation for the asymmetry, using the data already collected by CMS and ATLAS. Our analysis is model independent in the sense that we scan over all possible extra particles contributing to the asymmetry, and allow for general couplings. We also explore a class of Standard Model extensions which can accommodate the Tevatron asymmetry without contributing to the total t tbar cross section at first order, so that the enhancement of the tail at Tevatron and LHC is moderate.

arXiv commentLaTeX 21 pages. Added several references and comments, and an appendix to study the validity of the effective operator approximation and efficiency issues

References in corpus (40)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• An update on vector boson pair production at hadron colliders
• First measurement of the forward-backward charge asymmetry in top quark pair production
• Forward-Backward Asymmetry in Top Quark Production in ppbar Collisions at sqrt{s}=1.96 TeV
• 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
• Axigluon as Possible Explanation for $p\bar{p}\to t\bar{t}$ Forward-Backward Asymmetry
• Non-resonant New Physics in Top Pair Production at Hadron Colliders
• Single top quark production at LHC with anomalous Wtb couplings
• Top Quark Forward-Backward Asymmetry
• Explorations of the Top Quark Forward-Backward Asymmetry at the Tevatron
• Effective four-fermion operators in top physics: a roadmap
• Light colored scalars from grand unification and the forward-backward asymmetry in top quark pair production
• Forward-Backward Asymmetry of Top Quark Pair Production
• Constraining heavy colored resonances from top-antitop quark events
• The forward-backward asymmetry of top quark production at the Tevatron in warped extra dimensional models
• 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
• LHC Predictions from a Tevatron Anomaly in the Top Quark Forward-Backward Asymmetry
• Top quark asymmetry from a non-Abelian horizontal symmetry
• Top quark forward-backward asymmetry at the Tevatron: a comparative study in different new physics models
• Massive color-octet bosons and the charge asymmetries of top quarks at hadron colliders
• Forward-backward asymmetry of top quark in diquark models
• On Models of New Physics for the Tevatron Top A_FB
• Axigluons cannot explain the observed top quark forward-backward asymmetry
• Explaining the t tbar forward-backward asymmetry without dijet or flavor anomalies
• Forward-backward asymmetry in top quark production from light colored scalars in SO(10) model
• Top polarization, forward-backward asymmetry and new physics
• Top Quark Forward-Backward Asymmetry in the Large Invariant Mass Region
• Tevatron Asymmetry of Tops in a W',Z' Model
• Forward-backward asymmetry of top quark in unparticle physics
• Longitudinal top polarization as a probe of a possible origin of forward-backward asymmetry of the top quark at the Tevatron
• Top quark forward-backward asymmetry at Tevatron and its implications at the LHC
• A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
• Searching for Top Flavor Violating Resonances
• Implications of the CDF t\bar{t} Forward-Backward Asymmetry for Boosted Top Physics
• New Strongly Coupled Sector at the Tevatron and the LHC
• Forward-Backward t tbar Asymmetry from Anomalous Stop Pair Production
• Effective operators in top physics

Cited by in corpus (90)

• Effective description of general extensions of the Standard Model: the complete tree-level dictionary
• The electroweak contribution to the top quark forward-backward asymmetry at the Tevatron
• On the Validity of the Effective Field Theory Approach to SM Precision Tests
• Constraining top quark effective theory in the LHC Run II era
• Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
• Observable Effects of General New Scalar Particles
• Searches for new physics using the ttbar invariant mass distribution in pp collisions at sqrt(s)=8 TeV
• Search for anomalous t t-bar production in the highly-boosted all-hadronic final state
• Measurement of the charge asymmetry in top-quark pair production in proton-proton collisions at sqrt(s) = 7 TeV
• Top quark asymmetry from a non-Abelian horizontal symmetry
• On Models of New Physics for the Tevatron Top A_FB
• Explaining the t-tbar asymmetry with a light axigluon
• Explaining the t tbar forward-backward asymmetry without dijet or flavor anomalies
• A Polarized View of the Top Asymmetry
• Massive Color-Octet Bosons: Bounds on Effects in Top-Quark Pair Production
• Field redefinitions in effective theories at higher orders
• No like-sign tops at Tevatron: Constraints on extended models and implications for the t tbar asymmetry
• Asymmetries in t tbar production: LHC versus Tevatron
• Measurement of the top quark pair production charge asymmetry in proton-proton collisions at 7 TeV using the ATLAS detector
• Asymmetries in top quark pair production at hadron colliders
• A set of top quark spin correlation and polarization observables for the LHC: Standard Model predictions and new physics contributions
• Shaping the top asymmetry
• Simple models for the top asymmetry: constraints and predictions
• Stealth gluons at hadron colliders
• 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
• 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
• Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in $pp$ collision data at $\sqrt{s}=8$ TeV with the ATLAS detector
• Boosting the t tbar charge asymmetry
• Flavor Symmetric Sectors and Collider Physics
• Scalar-mediated $t\bar{t}$ forward-backward asymmetry
• $A_{FB}^t$ Meets 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
• Relating direct CP violation in D decays and the forward-backward asymmetry in $t\bar{t}$ production
• Top condensation as a motivated explanation of the top forward-backward asymmetry
• A unified, flavor symmetric explanation for the t-tbar asymmetry and Wjj excess at CDF
• An effective approach to same sign top pair production at the LHC and the forward-backward asymmetry at the Tevatron
• The Axigluon, a Four-Site Model and the Top Quark Forward-Backward Asymmetry at the Tevatron
• 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
• Chiral U(1) flavor models and flavored Higgs doublets: the top FB asymmetry and the Wjj
• Collider-independent t tbar forward-backward asymmetries
• Shedding light on the $t\bar{t}$ asymmetry: the photon handle
• 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
• Reconstructing the heavy resonance at hadron colliders
• Four tops and the t tbar forward-backward asymmetry
• 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
• Measuring Boosted Tops in Semi-leptonic $t\bar{t}$ Events for the Standard Model and Beyond
• Model-independent measurement of the top quark polarisation
• Forward Tevatron Tops and Backward LHC Tops with Associates
• Top asymmetry and the search for a light hadronic resonance in association with single top
• Diagnosing the top-quark angular asymmetry using LHC intrinsic charge asymmetries
• 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
• Top Quark Pair Production and Asymmetry at the Tevatron and LHC in Left-Right Models
• New Physics from High Energy Tops
• Top couplings and top partners
• Renormalization Group Constraints on New Top Interactions from Electroweak Precision Data
• Improving the Top Quark Forward-Backward Asymmetry Measurement at the LHC
• Same-sign Tops: A Powerful Diagnostic Test for Models of New Physics
• Interpretations and Implications of the Top Quark Rapidity Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell }$
• Next-to-leading order QCD effect of $W^{\prime }$ on top quark Forward-Backward Asymmetry
• Stealth QCD-like Strong Interactions and the t-tbar Asymmetry
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences
• Impact of extra particles on indirect Z' limits
• Comment on measuring the t-tbar forward-backward asymmetry at ATLAS and CMS
• New physics contributions to the forward-backward asymmetry at the Tevatron
• Quantum coherence, top transverse polarisation and the Tevatron asymmetry $A_{FB}^{\ell }$
• Portrait of a colour octet
• Predictions from Heavy New Physics Interpretation of the Top Forward-Backward Asymmetry
• Probing the Colour Structure of the Top Quark Forward-Backward Asymmetry
• Top Quark Charge Asymmetry: Searching for Light Axigluons in top pair + jet Production at the LHC
• What the top asymmetries tell us about single top production and Higgs decays
• Evidence for the charge asymmetry in $pp\to t\bar{t}$ production at $\sqrt{s}=13$ TeV with the ATLAS detector
• The Forward-Backward Top Asymmetry in a Singlet extension of the MSSM
• Top quark forward-backward asymmetry in R-parity violating supersymmetry
• Top-Quark Asymmetry -- A New Physics Overview
• Tevatron Top Quark Forward-Backward Asymmetry -- Implications for Same-sign Top Quark Pair Production
• Top quark physics in the Large Hadron Collider era
• Top-quark forward-backward asymmetry from a color-octet t-channel resonance
• Diquark contributions to Top quark charge asymmetry at the Tevatron and LHC
• LHC Dijet Signals in New Physics Models for Top Forward-Backward Asymmetry
• Top-quark Polarization and Asymmetries at the LHC in the Effective Description of Squark Interactions