Predictions from Heavy New Physics Interpretation of the Top Forward-Backward Asymmetry

Abstract

We derive generic predictions at hadron colliders from the large forward-backward asymmetry observed at the Tevatron, assuming the latter arises from heavy new physics beyond the Standard Model. We use an effective field theory approach to characterize the associated unknown dynamics. By fitting the Tevatron t \bar t data we derive constraints on the form of the new physics. Furthermore, we show that heavy new physics explaining the Tevatron data generically enhances at high invariant masses both the top pair production cross section and the charge asymmetry at the LHC. This enhancement can be within the sensitivity of the 8 TeV run, such that the 2012 LHC data should be able to exclude a large class of models of heavy new physics or provide hints for its presence. The same new physics implies a contribution to the forward-backward asymmetry in bottom pair production at low invariant masses of order a permil at most.

arXiv comment11 pages, 6 figures. v2: added remarks on EFT validity range, dijet bounds and UV completions; matches published version

References in corpus (18)

• Parton distributions for the LHC
• Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to q qbar -> t tbar + X
• Electroweak symmetry breaking after LEP1 and LEP2
• Renormalization-Group Improved Predictions for Top-Quark Pair Production at Hadron Colliders
• Charge asymmetries of top quarks at hadron colliders revisited
• Jet mass and substructure of inclusive jets in sqrt(s) = 7 TeV pp collisions with the ATLAS experiment
• Electroweak Limits on General New Vector Bosons
• Non-resonant New Physics in Top Pair Production at Hadron Colliders
• First Measurement of the $\lowercase{\ttbar}$ Differential Cross Section $\lowercase{dσ/d}M_{\lowercase{t\overline{t}}}$ in $\lowercase{\ppbar}$ Collisions at $\sqrt{\lowercase{s}}=1.96$ TeV
• Probing the Tevatron t tbar asymmetry at LHC
• Search for anomalous t t-bar production in the highly-boosted all-hadronic final state
• Model independent analysis of the forward-backward asymmetry of top quark production at the Tevatron
• Forward-backward asymmetry in t anti-t production from flavour symmetries
• Measurement of the ttbar production cross section using dilepton events in ppbar collisions
• Review of new physics effects in t-tbar production
• Longitudinal top polarization as a probe of a possible origin of forward-backward asymmetry of the top quark at the Tevatron
• Implications of the CDF t\bar{t} Forward-Backward Asymmetry for Boosted Top Physics
• Implications of the CDF t \bar t Forward-Backward Asymmetry for Hard Top Physics

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• Bottom-Quark Forward-Backward Asymmetry in the Standard Model and Beyond
• Bottom-Quark Forward-Backward and Charge Asymmetries at Hadron Colliders
• Beauty-quark and charm-quark pair production asymmetries at LHCb
• Asymmetric heavy-quark hadroproduction at LHCb: Predictions and applications