Flipping t tbar asymmetries at the Tevatron and the LHC

Abstract

We show that the charge asymmetry in t tbar production at the LHC, A_C, and the forward-backward asymmetry at the Tevatron, A_FB, are in general not tightly correlated. They can even have opposite signs, if the underlying new physics (NP) model is general enough. We demonstrate this using two examples of NP: a light axigluon, and a vector that is a color octet and electroweak triplet. The small value of A_C measured at the LHC is thus shown not to exclude a NP interpretation of the anomalously large A_FB at the Tevatron. We identify two observables where significant NP effects are still expected at the Tevatron and the LHC, the b bbar production forward-backward asymmetry and spin polarizations of the pair-produced tops and anti-tops.

5 pages, 5 figures

References in corpus (8)

• PYTHIA 6.4 Physics and Manual
• FeynRules - Feynman rules made easy
• Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
• Axigluons cannot explain the observed top quark forward-backward asymmetry
• Application of the Principle of Maximum Conformality to the Top-Quark Forward-Backward Asymmetry at the Tevatron
• QCD Coherence and the Top Quark Asymmetry
• Discerning New Physics in Top-Antitop Production using Top Spin Observables at Hadron Colliders
• Gluon excitations in t tbar production at hadron colliders

Cited by in corpus (28)

• Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties
• Top quark and leptonic charge asymmetries for the Tevatron and LHC
• Inclusive and differential measurements of the t t-bar charge asymmetry in proton-proton collisions at sqrt(s) = 7 TeV
• Zero and one jet combined NLO analysis of the top quark forward-backward asymmetry
• Asymmetries in top quark pair production at hadron colliders
• Discerning New Physics in Top-Antitop Production using Top Spin Observables at Hadron Colliders
• Measurement of the leptonic asymmetry in ttbar events produced in ppbar collisions at sqrt(s)=1.96 TeV
• Higgs Uncovering Light Scalar Remnants of High Scale Matter Unification
• Shedding light on the $t\bar{t}$ asymmetry: the photon handle
• Leptonic Monotops at LHC
• Data driving the top quark forward--backward asymmetry with a lepton-based handle
• Light axigluon explanation of the Tevatron ttbar asymmetry and multijet signals at the LHC
• Forward Tevatron Tops and Backward LHC Tops with Associates
• Bottom-Quark Forward-Backward Asymmetry in the Standard Model and Beyond
• Looking for bSM physics using top-quark polarization and decay-lepton kinematic asymmetries
• Collider-independent top quark forward-backward asymmetries: standard model predictions
• Beauty-quark and charm-quark pair production asymmetries at LHCb
• Bottom-Quark Forward-Backward and Charge Asymmetries at Hadron Colliders
• 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
• Asymmetric heavy-quark hadroproduction at LHCb: Predictions and applications
• Light Axigluon Contributions to b-bbar and c-cbar Asymmetry and Constraints on Flavor Changing Axigluon Currents
• Enhancing the sensitivity to New Physics in the top-antitop invariant mass distribution
• Light axigluon and single top production at the LHC
• 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
• Single lepton charge asymmetries in $t\bar{t}$ and $t\bar{t}\gamma$ production at the LHC
• Top-quark Polarization and Asymmetries at the LHC in the Effective Description of Squark Interactions