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Top-Quark Forward-Backward Symmetry
High Energy Physics - Phenomenology · Submitted 23 May 2011
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Still, it is not possible to increase the forward-backward asymmetry with respect to the Standard-Model prediction in this framework.
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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
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The abstract, sentence by sentence
Top-quark pair production at the Tevatron is discussed within the Randall-Sundrum model of warped extra dimensions. Generically, the exchange of massive Kaluza-Klein gluons has the potential to generate a large forward-backward asymmetry. In models with an anarchic flavor structure, however, their coupling to the light quarks inside the proton is strongly suppressed. The consequent suppression of the asymmetry at tree level is lifted at next-to-leading order. Still, it is not possible to increase the forward-backward asymmetry with respect to the Standard-Model prediction in this framework.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Top-quark pair production at the Tevatron is discussed within the Randall-Sundrum model of warped extra dimensions. | contribution 0.51 | 0.26 | 0.04 | asserted 0.94 |
| s1 | Generically, the exchange of massive Kaluza-Klein gluons has the potential to generate a large forward-backward asymmetry. | background 0.95 | 0.10 | 0.05 | hedged possibility 1.00 |
| s2 | In models with an anarchic flavor structure, however, their coupling to the light quarks inside the proton is strongly suppressed. | result 0.59 | 0.13 | 0.05 | asserted 1.00 |
| s3 | The consequent suppression of the asymmetry at tree level is lifted at next-to-leading order. | result 0.92 | 0.43 | 0.09 | asserted 1.00 |
| s4 | Still, it is not possible to increase the forward-backward asymmetry with respect to the Standard-Model prediction in this framework. | result 0.87 | 0.63 | 0.81 | asserted 0.98 |
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The paper
Original abstract
Top-quark pair production at the Tevatron is discussed within the Randall-Sundrum model of warped extra dimensions. Generically, the exchange of massive Kaluza-Klein gluons has the potential to generate a large forward-backward asymmetry. In models with an anarchic flavor structure, however, their coupling to the light quarks inside the proton is strongly suppressed. The consequent suppression of the asymmetry at tree level is lifted at next-to-leading order. Still, it is not possible to increase the forward-backward asymmetry with respect to the Standard-Model prediction in this framework.
Human review
How the literature uses it
3 arXiv papers cite this in 4 sentences
Papers citing it
Cites it as background 3 papers
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Another kind of widely discussed NP is the s-channel color-octet axial-vector boson [ref] , where the new boson induces a new s-channel $qq̅→tt̅$.
New color-octet axial vector boson revisited · Introduction · 0.98
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Many NP models that affect $$, either via s-channel [ref] or $t$-channel exchange of new particles [ref] have been proposed to explain the forward-backward anomaly.
The Top Forward Backward Asymmetry with general Z ' couplings · Introduction · 0.89
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Models with exotic gluons [ref] , Kaluza-Klein modes within extra dimensional models [ref] , and models with new vector bosons [ref] have also been studied in great detail.
The Forward-Backward Top Asymmetry in a Singlet extension of the MSSM · Introduction · 0.99
What it cites · 6 sentences without a confident label
Uses the method or tool of 1 paper
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Using Eqs. ([ref]), ([ref]), and ([ref]), and focussing on the dominant contributions from $uu̅$ initial states, one obtains [For details on the inputs and the numerical calculation, please consult [ref] .] [equation] Discarding the axial-vector contributions, proportional to $C̃_uu̅^A = 𝒪(10^-3)$, we inspect the interplay of NP effects mediated by the vector coefficient $C̃_uu̅^V$.
Top-Quark Forward-Backward Asymmetry in Randall-Sundrum Models Beyond the Leading Order · Discussion and conclusions · 0.90
Uses data or values from 2 papers
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In contrast, the forward-backward asymmetry of the top quark is in variance with the result in Quantum Chromodynamics (QCD): the measured total asymmetry in the laboratory frame and the result at $tt̅$ invariant mass measured at CDF, [ref] [equation] exceed the SM predictions by about $1.3 σ$ and $3.2 σ$, respectively.
Evidence for a Mass Dependent Forward-Backward Asymmetry in Top Quark Pair Production · Introduction · 0.86
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Up-to-date QCD calculations predict a small value of the asymmetry in the laboratory frame, $(A_FB^t)_SM^pp̅ = (4-5.6)%$ [ref] .
RG-improved single-particle inclusive cross sections and forward-backward asymmetry in $t\bar t$ production at hadron colliders · Introduction · 0.96
Cites as background 1 paper
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The Randall-Sundrum model was originally designed to explain the large hierarchy between the electroweak and the Planck scales by gravitational red-shifting in a warped extra dimension [ref] .
A Large Mass Hierarchy from a Small Extra Dimension · Randall-Sundrum model with flavor anarchy · 0.99
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