Searching for Top Flavor Violating Resonances

Abstract

We study new top flavor violating resonances that are singly produced in association with a top at the LHC. Such top flavor violating states could be responsible for the Tevatron top forward-backward asymmetry. Since top flavor violating states can directly decay to a top (or anti-top) and jet, and are produced in conjunction with another (oppositely charged) top, the direct signature of such states is a t j (or tbar j) resonance in t tbar j events. In general, these states can be very light and have O(1) couplings to the top sector so that they are copiously produced. We present a search strategy and estimate the discovery potential at the early LHC by implementing the strategy on simulated data. For example, with 1 fb^-1 at 7 TeV, we estimate that a W' coupling to d_R tbar_R can be constrained at the 3 sigma level for g_R = 1 and m_W' = 200 GeV, weakening to g_R = 1.75 for m_W' = 600 GeV. With the search we advocate here, a bound at a similar level could be obtained for top flavor violating Z's, as well as triplet and sextet diquarks.

24 pages, 9 figures, revtex 4

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• Top Quark Pair Production in Association with a Jet with NLO QCD Off-Shell Effects at the Large Hadron Collider
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• Off-shell Top Quarks with One Jet at the LHC: A comprehensive analysis at NLO QCD
• Closing the Wedge: Search Strategies for Extended Higgs Sectors with Heavy Flavor Final States
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• Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
• Flavor Symmetric Sectors and Collider Physics
• 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
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• Tevatron Top $A_{FB}$ Versus LHC Top Physics
• Calculation of Associated Production of a Top Quark and a W' at the LHC
• Search for resonant top plus jet production in ttbar + jets events with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV
• A charged Z' to conciliate the apparent disagreement between top-antitop Tevatron forward-backward asymmetry and LHC charge asymmetry
• Top-Quark Charge Asymmetry Goes Forward: Two New Observables for Hadron Colliders
• Top A_FB at the Tevatron vs. charge asymmetry at the LHC in chiral U(1) flavor models with flavored Higgs doublets
• Forward Tevatron Tops and Backward LHC Tops with Associates
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• Diagnosing the top-quark angular asymmetry using LHC intrinsic charge asymmetries
• Top Quark Pair Production and Asymmetry at the Tevatron and LHC in Left-Right Models
• Search for $t{Z}^{\prime }$ associated production induced by $tc{Z}^{\prime }$ couplings at the LHC
• Leptophobic Z' Boson and Parity-Violating eD Scattering
• New color-octet axial vector boson revisited
• Same-sign Tops: A Powerful Diagnostic Test for Models of New Physics
• New physics contributions to the forward-backward asymmetry at the Tevatron
• Comment on measuring the t-tbar forward-backward asymmetry at ATLAS and CMS
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences
• Diquark Explanation of $b\to s{\ell }^{+}{\ell }^{-}$
• Top Quark Forward-Backward Asymmetry and Anomalous Right-Handed Charge Currents
• Non-factorizable effects in top quark production
• Diquarks from a fourth family
• Herwig++ 2.6 Release Note
• Signature of same-sign top pair production mediated by a nonuniversal $Z^{\prime }$ with QCD next-to-leading accuracy at the LHC
• LHC and Tevatron constraints on a W' model interpretation of the top quark forward-backward asymmetry