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Measurement of the Differential Cross Section d{\sigma}/d(cos {\theta}t) for Top-Quark Pair Production in p-pbar Collisions at sqrt{s} = 1.96 TeV
High Energy Physics - Experiment · Submitted 10 Jun 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard-model calculation, with the exception of an excess linear-term coefficient, a1 = 0.40 +- 0.12, compared to the standard-model prediction of a1 = 0.15^{+0.07}_{-0.03}.
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The abstract, sentence by sentence
We report a measurement of the differential cross section, d{\sigma}/d(cos {\theta}t), for top-quark-pair production as a function of the top-quark production angle in proton-antiproton collisions at sqrt{s} = 1.96 TeV. This measurement is performed using data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.4/fb. We employ the Legendre polynomials to characterize the shape of the differential cross section at the parton level. The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard-model calculation, with the exception of an excess linear-term coefficient, a1 = 0.40 +- 0.12, compared to the standard-model prediction of a1 = 0.15^{+0.07}_{-0.03}.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We report a measurement of the differential cross section, d{\sigma}/d(cos {\theta}t), for top-quark-pair production as a function of the top-quark production angle in proton-antiproton collisions at sqrt{s} = 1.96 TeV. | contribution 0.97 | 0.97 | 0.12 | asserted 1.00 |
| s1 | This measurement is performed using data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.4/fb. | method 1.00 | 0.74 | 0.02 | asserted 0.99 |
| s2 | We employ the Legendre polynomials to characterize the shape of the differential cross section at the parton level. | method 1.00 | 0.86 | 0.03 | asserted 1.00 |
| s3 | The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard-model calculation, with the exception of an excess linear-term coefficient, a1 = 0.40 +- 0.12, compared to the standard-model prediction of a1 = 0.15^{+0.07}_{-0.03}. | result 1.00 | 0.93 | 0.76 | asserted 0.94 |
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The paper
Original abstract
We report a measurement of the differential cross section, d{\sigma}/d(cos {\theta}t), for top-quark-pair production as a function of the top-quark production angle in proton-antiproton collisions at sqrt{s} = 1.96 TeV. This measurement is performed using data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.4/fb. We employ the Legendre polynomials to characterize the shape of the differential cross section at the parton level. The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard-model calculation, with the exception of an excess linear-term coefficient, a1 = 0.40 +- 0.12, compared to the standard-model prediction of a1 = 0.15^{+0.07}_{-0.03}.
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References
How the literature uses it
16 arXiv papers cite this in 27 sentences
Papers citing it · 17 sentences without a confident label
Uses its data or values 2 papers
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Dropping the $J=1$ restriction, we see from Eq. ([ref]) that in full generality the partonic differential cross section can be expanded in terms of Legendre polynomials, [equation] The coefficients $a_l$ of this expansion are called “Legendre momenta” and the first ones have been measured by the CDF Collaboration [ref] , finding an excess in $a_1$, precisely the coefficient of the lowest-order polynomial generating an asymmetry.
Asymmetries in top quark pair production at hadron colliders · The polar angle distribution and its asymmetry · 0.94
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This angular distribution was measured by the CDF Collaboration [ref] .
NNLO QCD predictions for fully-differential top-quark pair production at the Tevatron · Top-quark $cosθ$ distribution and Legendre moments · 0.81
Compares with it 1 paper
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[ref] below), together with the related Legendre moments, and compare the NNLO QCD predictions with measurements of the CDF Collaboration [ref] .
NNLO QCD predictions for fully-differential top-quark pair production at the Tevatron · Introduction · 0.97
Cites it as background 3 papers
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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
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Despite the relatively limited statistics for top events at Tevatron energies, both the CDF and DØ collaborations have presented a number of measurements of differential distributions [ref] and differential top-quark forward-backward asymmetry ($$) [ref] .
NNLO QCD predictions for fully-differential top-quark pair production at the Tevatron · Introduction · 0.85
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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
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