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Measurement of the inclusive jet cross-section in pp collisions at [Formula: see text] and comparison to the inclusive jet cross-section at [Formula: see text] using the ATLAS detector.

- Eur Phys J C Part Fields (2013)

Bottom Line: The inclusive jet double-differential cross-section is presented as a function of the jet transverse momentum p T and jet rapidity y, covering a range of 20≤p T<430 GeV and /y/<4.4.The systematic uncertainties on the ratios are significantly reduced due to the cancellation of correlated uncertainties in the two measurements.Results are compared to the prediction from next-to-leading order perturbative QCD calculations corrected for non-perturbative effects, and next-to-leading order Monte Carlo simulation.

View Article: PubMed Central - PubMed

Affiliation: Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg, Germany.

ABSTRACT

The inclusive jet cross-section has been measured in proton-proton collisions at [Formula: see text] in a dataset corresponding to an integrated luminosity of [Formula: see text] collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets are identified using the anti-k t algorithm with two radius parameters of 0.4 and 0.6. The inclusive jet double-differential cross-section is presented as a function of the jet transverse momentum p T and jet rapidity y, covering a range of 20≤p T<430 GeV and /y/<4.4. The ratio of the cross-section to the inclusive jet cross-section measurement at [Formula: see text], published by the ATLAS Collaboration, is calculated as a function of both transverse momentum and the dimensionless quantity [Formula: see text], in bins of jet rapidity. The systematic uncertainties on the ratios are significantly reduced due to the cancellation of correlated uncertainties in the two measurements. Results are compared to the prediction from next-to-leading order perturbative QCD calculations corrected for non-perturbative effects, and next-to-leading order Monte Carlo simulation. Furthermore, the ATLAS jet cross-section measurements at [Formula: see text] and [Formula: see text] are analysed within a framework of next-to-leading order perturbative QCD calculations to determine parton distribution functions of the proton, taking into account the correlations between the measurements.

No MeSH data available.


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The uncertainty in the NLO pQCD prediction of the inclusive jet cross-section at , calculated using NLOJET++ with the CT10 PDF set, for anti-kt jets with R=0.6 shown in three representative rapidity bins as a function of the jet pT. In addition to the total uncertainty, the uncertainties from the scale choice, the PDF set and the strong coupling constant, αS, are shown separately
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Fig1: The uncertainty in the NLO pQCD prediction of the inclusive jet cross-section at , calculated using NLOJET++ with the CT10 PDF set, for anti-kt jets with R=0.6 shown in three representative rapidity bins as a function of the jet pT. In addition to the total uncertainty, the uncertainties from the scale choice, the PDF set and the strong coupling constant, αS, are shown separately

Mentions: The evaluated relative uncertainties of the NLO pQCD calculation for the inclusive jet cross-section at are shown in Fig. 1 as a function of the jet pT for representative rapidity bins and R=0.6. In the central rapidity region, the uncertainties are about 5 % for pT≲100 GeV, increasing to about 15 % in the highest jet pT bin. In the most forward region, they are 10 % in the lowest pT bin and up to 80 % in the highest pT bin. In the higher pT region, the upper bound on the uncertainty is driven by the PDF uncertainty, while the lower bound and the uncertainty at low pT are dominated by the scale choice. The uncertainties for R=0.4 are similar. Fig. 1


Measurement of the inclusive jet cross-section in pp collisions at [Formula: see text] and comparison to the inclusive jet cross-section at [Formula: see text] using the ATLAS detector.

- Eur Phys J C Part Fields (2013)

The uncertainty in the NLO pQCD prediction of the inclusive jet cross-section at , calculated using NLOJET++ with the CT10 PDF set, for anti-kt jets with R=0.6 shown in three representative rapidity bins as a function of the jet pT. In addition to the total uncertainty, the uncertainties from the scale choice, the PDF set and the strong coupling constant, αS, are shown separately
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4400855&req=5

Fig1: The uncertainty in the NLO pQCD prediction of the inclusive jet cross-section at , calculated using NLOJET++ with the CT10 PDF set, for anti-kt jets with R=0.6 shown in three representative rapidity bins as a function of the jet pT. In addition to the total uncertainty, the uncertainties from the scale choice, the PDF set and the strong coupling constant, αS, are shown separately
Mentions: The evaluated relative uncertainties of the NLO pQCD calculation for the inclusive jet cross-section at are shown in Fig. 1 as a function of the jet pT for representative rapidity bins and R=0.6. In the central rapidity region, the uncertainties are about 5 % for pT≲100 GeV, increasing to about 15 % in the highest jet pT bin. In the most forward region, they are 10 % in the lowest pT bin and up to 80 % in the highest pT bin. In the higher pT region, the upper bound on the uncertainty is driven by the PDF uncertainty, while the lower bound and the uncertainty at low pT are dominated by the scale choice. The uncertainties for R=0.4 are similar. Fig. 1

Bottom Line: The inclusive jet double-differential cross-section is presented as a function of the jet transverse momentum p T and jet rapidity y, covering a range of 20≤p T<430 GeV and /y/<4.4.The systematic uncertainties on the ratios are significantly reduced due to the cancellation of correlated uncertainties in the two measurements.Results are compared to the prediction from next-to-leading order perturbative QCD calculations corrected for non-perturbative effects, and next-to-leading order Monte Carlo simulation.

View Article: PubMed Central - PubMed

Affiliation: Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg, Germany.

ABSTRACT

The inclusive jet cross-section has been measured in proton-proton collisions at [Formula: see text] in a dataset corresponding to an integrated luminosity of [Formula: see text] collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets are identified using the anti-k t algorithm with two radius parameters of 0.4 and 0.6. The inclusive jet double-differential cross-section is presented as a function of the jet transverse momentum p T and jet rapidity y, covering a range of 20≤p T<430 GeV and /y/<4.4. The ratio of the cross-section to the inclusive jet cross-section measurement at [Formula: see text], published by the ATLAS Collaboration, is calculated as a function of both transverse momentum and the dimensionless quantity [Formula: see text], in bins of jet rapidity. The systematic uncertainties on the ratios are significantly reduced due to the cancellation of correlated uncertainties in the two measurements. Results are compared to the prediction from next-to-leading order perturbative QCD calculations corrected for non-perturbative effects, and next-to-leading order Monte Carlo simulation. Furthermore, the ATLAS jet cross-section measurements at [Formula: see text] and [Formula: see text] are analysed within a framework of next-to-leading order perturbative QCD calculations to determine parton distribution functions of the proton, taking into account the correlations between the measurements.

No MeSH data available.


Related in: MedlinePlus