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Top-Quark Charge Asymmetry Goes Forward: Two New Observables for Hadron Colliders
High Energy Physics - Phenomenology · Submitted 14 May 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Top-pair plus jet production thus has the potential to become the discovery channel of the charge asymmetry in proton-proton collisions.
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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
We propose two new observables to measure the charge asymmetry in hadronic top-quark pair production in association with a hard jet. The incline asymmetry, based on the inclination between the planes of initial- and final-state momenta, probes the charge asymmetry in the quark-antiquark channel. Compared to the hitherto investigated rapidity asymmetries, the incline asymmetry provides improved access to the partonic charge asymmetry at both the Tevatron and the LHC. The energy asymmetry, based on the energy difference between top and antitop quarks, for the first time allows us to probe the charge asymmetry in the quark-gluon channel at the LHC. In quantum chromodynamics, asymmetries of up to -12% at the leading order are achievable with appropriate cuts. Top-pair plus jet production thus has the potential to become the discovery channel of the charge asymmetry in proton-proton collisions.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We propose two new observables to measure the charge asymmetry in hadronic top-quark pair production in association with a hard jet. | contribution 1.00 | 0.90 | 0.13 | asserted 0.97 |
| s1 | The incline asymmetry, based on the inclination between the planes of initial- and final-state momenta, probes the charge asymmetry in the quark-antiquark channel. | contribution 0.75 | 0.67 | 0.09 | asserted 1.00 |
| s2 | Compared to the hitherto investigated rapidity asymmetries, the incline asymmetry provides improved access to the partonic charge asymmetry at both the Tevatron and the LHC. | result 0.41 | 0.58 | 0.18 | asserted 0.99 |
| s3 | The energy asymmetry, based on the energy difference between top and antitop quarks, for the first time allows us to probe the charge asymmetry in the quark-gluon channel at the LHC. | contribution 0.92 | 0.71 | 0.18 | asserted 0.90 |
| s4 | In quantum chromodynamics, asymmetries of up to -12% at the leading order are achievable with appropriate cuts. | result 0.75 | 0.34 | 0.08 | hedged possibility 0.74 |
| s5 | Top-pair plus jet production thus has the potential to become the discovery channel of the charge asymmetry in proton-proton collisions. | interpretation 0.98 | 0.24 | 0.64 | hedged possibility 0.99 |
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The paper
Original abstract
We propose two new observables to measure the charge asymmetry in hadronic top-quark pair production in association with a hard jet. The incline asymmetry, based on the inclination between the planes of initial- and final-state momenta, probes the charge asymmetry in the quark-antiquark channel. Compared to the hitherto investigated rapidity asymmetries, the incline asymmetry provides improved access to the partonic charge asymmetry at both the Tevatron and the LHC. The energy asymmetry, based on the energy difference between top and antitop quarks, for the first time allows us to probe the charge asymmetry in the quark-gluon channel at the LHC. In quantum chromodynamics, asymmetries of up to -12% at the leading order are achievable with appropriate cuts. Top-pair plus jet production thus has the potential to become the discovery channel of the charge asymmetry in proton-proton collisions.
Human review
References
How the literature uses it
16 arXiv papers cite this in 40 sentences
Papers citing it · 27 sentences without a confident label
Uses its method or tool 1 paper
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We use the parameterization given in Ref. [ref] .
Top Quark Charge Asymmetry: Searching for Light Axigluons in top pair + jet Production at the LHC · Theory · 1.00
Uses its data or values 3 papers
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At a collision energy of $8$ TeV (LHC8), the asymmetries can reach values up to $A^φ,q = -6%$ and $A^E = -14%$ in QCD at leading order for strong cuts (and correspondingly low production rates) [ref] .
Charge Asymmetry in Top Pair plus Jet Production -- A Snowmass White Paper · Observability at LHC8 and LHC14 · 0.98
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Ref. [ref] finds that it is possible to measure an incline asymmetry of the order of 4% with a significance of three standard deviations with $100 fb^-1$ at 14 TeV (see Fig. [ref]).
Kinematics of Top Quark Final States: A Snowmass White Paper · New observables for the top charge asymmetry at the LHC · 0.89
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After setting suitable cuts, the incline-asymmetry distribution, evaluated at NLO in QCD in [ref] , can reach the value of $-4%$ at $14$ LHC, and can be observed with a significance of 5 standard deviations at a luminosity of 100.
The Standard Model from the LHC to future colliders: a contribution to the Workshop "What Next" of INFN · Final-state kinematics · 0.90
Compares with it 1 paper
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The SM asymmetry is always negative and almost identical to the results based on the definition given in [ref] which ignored the condition on the sign of $y_tt̅j$ to enhance contributions related to a given direction of the incoming quark.
Top Quark Charge Asymmetry: Searching for Light Axigluons in top pair + jet Production at the LHC · Energy asymmetry at the hadron level · 1.00
Cites it as background 4 papers
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The top-antitop energy asymmetry as an observable of the charge asymmetry was first introduced in Reference [ref] .
Observing the Top Energy Asymmetry at the LHC · Observables of the charge asymmetry · 0.93
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It was first proposed in Ref. [ref] and later computed to next-to-leading order (NLO) in QCD [ref] .
Measuring the top energy asymmetry at the LHC: QCD and SMEFT interpretations · Introduction · 0.93
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To help resolve the discrepancy, several suggestions have been made with the aim to obtain additional handles in the measurements, cf. for example Refs. [ref] .
NLO QCD corrections to W+ W- b anti-b production with leptonic decays in the light of top quark mass and asymmetry measurements · Top quark asymmetries · 0.80
Discussion
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