Measurement of the asymmetry in angular distributions of leptons produced in dilepton ttbar final states in ppbar collisions at sqrt(s)=1.96 TeV

D0 Collaboration

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Measurement of the asymmetry in angular distributions of leptons produced in dilepton ttbar final states in ppbar collisions at sqrt(s)=1.96 TeV

D0 Collaboration

High Energy Physics - Experiment · Submitted 30 Aug 2013

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim Using 9.7 fb^-1 of integrated luminosity collected with the D0 detector, we find the asymmetries in lepton pseudorapidity compatible with predictions based on the standard model.

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arXiv ID1308.6690 (version 2)

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CitationD0 Collaboration. "Measurement of the asymmetry in angular distributions of leptons produced in dilepton ttbar final states in ppbar collisions at sqrt(s)=1.96 TeV." arXiv:1308.6690 (2013). https://pith.science/paper/Q2MJDHSM

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We present measurements of asymmetries in angular distributions of leptons produced in ttbar events in proton-antiproton collisions at the Fermilab Tevatron Collider. We consider final states where the W bosons from top quark and antiquark decays both decay into l nu (l=e, mu) resulting in oppositely charged dilepton final states with accompanying jets. Using 9.7 fb^-1 of integrated luminosity collected with the D0 detector, we find the asymmetries in lepton pseudorapidity compatible with predictions based on the standard model.

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We present measurements of asymmetries in angular distributions of leptons produced in ttbar events in proton-antiproton collisions at the Fermilab Tevatron Collider.	contribution 1.00	0.96	0.08	asserted 0.99
s1	We consider final states where the W bosons from top quark and antiquark decays both decay into l nu (l=e, mu) resulting in oppositely charged dilepton final states with accompanying jets.	method 0.66	0.21	0.02	asserted 0.76
s2	Using 9.7 fb^-1 of integrated luminosity collected with the D0 detector, we find the asymmetries in lepton pseudorapidity compatible with predictions based on the standard model.	result 1.00	0.98	0.88	asserted 0.84

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Original abstract

We present measurements of asymmetries in angular distributions of leptons produced in ttbar events in proton-antiproton collisions at the Fermilab Tevatron Collider. We consider final states where the W bosons from top quark and antiquark decays both decay into l nu (l=e, mu) resulting in oppositely charged dilepton final states with accompanying jets. Using 9.7 fb^-1 of integrated luminosity collected with the D0 detector, we find the asymmetries in lepton pseudorapidity compatible with predictions based on the standard model.

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18 arXiv papers cite this in 26 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 19 sentences without a confident label

Uses its data or values 2 papers

There is a noticeable trend, with the four measurements of $$ using the full data set [ref] , as well as measurements of a related single lepton asymmetry $$ [ref] and a dilepton asymmetry $$ [ref] always above the SM prediction, to varying degrees, see figure [ref] (left).

Single lepton charge asymmetries in $t \bar t$ and $t \bar t \gamma$ production at the LHC · Introduction · 0.85
The D0 measurement of $$ in the dilepton mode uses $9.7$ [ref] .

Asymmetries in top quark pair production at hadron colliders · Leptonic asymmetries at D0 · 0.96

Compares with it 1 paper

In this note, we report a new measurement [ref] accepted by PRD of the tt̅ asymmetry based on leptons produced in tt̅ events in the dilepton channel with the full dataset collected by the D0 Collaboration in Run II of the Tevatron corresponding to an integrated luminosity of 9.7 fb$^-1$, and we compare our results with the most recent predictions based on the standard model [ref] .

Measurement of the leptonic ttbar charge asymmetry in the dilepton channel with the D0 detector · Introduction · 0.86

Cites it as background 3 papers

Indeed, the $$-related publications by the CDF [ref] and DØ [ref] collaborations have initiated major research activity both in explaining the discrepancy with beyond the Standard Model (BSM) physics (see e.g. Refs. [ref] ) and in estimating $$ within the Standard Model [ref] (see Ref. [ref] for an in-depth review).

Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation · Introduction · 0.82
We then recall in Section III a “color reconnection” mechanism proposed recently [ref] in the context of a forward-backward asymmetry in top quark production at the Tevatron observed by CDF [ref] and D0 [ref] .

Asymmetry in $\Lambda_b$ and $\bar \Lambda_b$ production · Introduction · 0.80
The relation between top quark and leptonic asymmetries has also been studied at the Tevatron where, owing to the $pp̅$ initial state, forward-backward quantities are very meaningful [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 · 0.93

What it cites · 1 sentence without a confident label

Uses the method or tool of 3 papers

Jets are identified as energy clusters in the electromagnetic and hadronic parts of the calorimeter reconstructed using an iterative mid-point cone algorithm with radius $R=0.5$ [ref] and $||< 2.5$.

Run II Jet Physics: Proceedings of the Run II QCD and Weak Boson Physics Workshop · The Detector and Object Identification · 1.00
A muon is identified [ref] as a segment in at least one layer of the muon system that is matched to a track reconstructed in the central tracking system.

Muon reconstruction and identification with the Run II D0 detector · The Detector and Object Identification · 0.96
We use the NLO generator 3.4 [ref] , interfaced with 6.510 [ref] for parton showering and hadronization, to simulate events.

The MC@NLO 3.4 Event Generator · Simulated events · 1.00

Compares with 1 paper

In addition, we study the dependence of the corrected asymmetries as a function of $q×η$ and $Δη$ in Fig. [ref], where we observe no significant dependence on these variables in the data and consistent with the [ref] predictions.

The MC@NLO 3.4 Event Generator · Results · 0.99

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