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Charge Asymmetry in Top Pair plus Jet Production -- A Snowmass White Paper
High Energy Physics - Phenomenology · Submitted 23 Jul 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim With 14 TeV and an integrated luminosity of 50 inverse fb or more, an asymmetry of up to -12% can be observed with a statistical significance of more than 5 standard deviations.
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The abstract, sentence by sentence
We investigate the discovery potential of the top-quark charge asymmetry at the LHC in top-antitop production in association with a hard jet. In this process, the charge asymmetry can be accessed via two novel observables: the incline asymmetry, which probes the quark-antiquark channel, and the energy asymmetry, which gives access to the quark-gluon channel. At 8 TeV collision energy, the significance for both observables is statistically limited. With 14 TeV and an integrated luminosity of 50 inverse fb or more, an asymmetry of up to -12% can be observed with a statistical significance of more than 5 standard deviations. Prospects of measuring the charge asymmetry at the intended high-luminosity and high-energy LHC upgrades are discussed.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We investigate the discovery potential of the top-quark charge asymmetry at the LHC in top-antitop production in association with a hard jet. | contribution 1.00 | 0.76 | 0.05 | asserted 0.70 |
| s1 | In this process, the charge asymmetry can be accessed via two novel observables: the incline asymmetry, which probes the quark-antiquark channel, and the energy asymmetry, which gives access to the quark-gluon channel. | contribution 0.54 | 0.32 | 0.06 | asserted 0.89 |
| s2 | At 8 TeV collision energy, the significance for both observables is statistically limited. | result 0.78 | 0.67 | 0.07 | asserted 1.00 |
| s3 | With 14 TeV and an integrated luminosity of 50 inverse fb or more, an asymmetry of up to -12% can be observed with a statistical significance of more than 5 standard deviations. | result 1.00 | 0.67 | 0.66 | asserted 0.67 |
| s4 | Prospects of measuring the charge asymmetry at the intended high-luminosity and high-energy LHC upgrades are discussed. | future work 0.63 | 0.30 | 0.05 | unclear 0.69 |
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The paper
Original abstract
We investigate the discovery potential of the top-quark charge asymmetry at the LHC in top-antitop production in association with a hard jet. In this process, the charge asymmetry can be accessed via two novel observables: the incline asymmetry, which probes the quark-antiquark channel, and the energy asymmetry, which gives access to the quark-gluon channel. At 8 TeV collision energy, the significance for both observables is statistically limited. With 14 TeV and an integrated luminosity of 50 inverse fb or more, an asymmetry of up to -12% can be observed with a statistical significance of more than 5 standard deviations. Prospects of measuring the charge asymmetry at the intended high-luminosity and high-energy LHC upgrades are discussed.
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References
How the literature uses it
1 arXiv paper cite this in 3 sentences
Papers citing it · 1 sentence without a confident label
Uses its data or values 1 paper
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For reasonably large asymmetries of around 8% wide $|y|$, cuts of up to 5 are needed for the rapidity of the $tt̅+j$ system [ref] .
Kinematics of Top Quark Final States: A Snowmass White Paper · New observables for the top charge asymmetry at the LHC · 0.80
Cites it as background 1 paper
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Berge and by the LHCb collaboration, which appear in full elsewhere [ref] .
Kinematics of Top Quark Final States: A Snowmass White Paper · Introduction · 0.88
What it cites · 11 sentences without a confident label
Uses data or values from 1 paper
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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] .
Top-Quark Charge Asymmetry Goes Forward: Two New Observables for Hadron Colliders · Observability at LHC8 and LHC14 · 0.98
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