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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.


Related in: MedlinePlus

Ratio of the inclusive jet cross-section at  to the one at , shown as a double ratio to the theoretical prediction calculated with the CT10 PDFs as a function of pT in bins of jet rapidity, for anti-kt jets with R=0.4. Also shown are Powheg predictions using Pythia for the simulation of the parton shower and hadronisation with the AUET2B tune and the Perugia 2011 tune. Only the statistical uncertainty is shown on the Powheg predictions. Statistically insignificant data points at large pT are omitted. The 4.3 % uncertainty from the luminosity measurements is not shown
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Fig19: Ratio of the inclusive jet cross-section at to the one at , shown as a double ratio to the theoretical prediction calculated with the CT10 PDFs as a function of pT in bins of jet rapidity, for anti-kt jets with R=0.4. Also shown are Powheg predictions using Pythia for the simulation of the parton shower and hadronisation with the AUET2B tune and the Perugia 2011 tune. Only the statistical uncertainty is shown on the Powheg predictions. Statistically insignificant data points at large pT are omitted. The 4.3 % uncertainty from the luminosity measurements is not shown

Mentions: A comparison of the jet cross-section ratio as a function of pT to the Powheg prediction is made in Figs. 19 and 20. Differences between the tunes used in Pythia for the parton shower are very small, and deviations are seen only in the forward region for large pT. Like the NLO pQCD prediction with non-perturbative corrections, the Powheg prediction has a different trend in the central rapidity region with respect to data, deviating by more than 10 %. However, it follows the data very well in the forward region. Fig. 19


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)

Ratio of the inclusive jet cross-section at  to the one at , shown as a double ratio to the theoretical prediction calculated with the CT10 PDFs as a function of pT in bins of jet rapidity, for anti-kt jets with R=0.4. Also shown are Powheg predictions using Pythia for the simulation of the parton shower and hadronisation with the AUET2B tune and the Perugia 2011 tune. Only the statistical uncertainty is shown on the Powheg predictions. Statistically insignificant data points at large pT are omitted. The 4.3 % uncertainty from the luminosity measurements is not shown
© Copyright Policy
Related In: Results  -  Collection

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

Fig19: Ratio of the inclusive jet cross-section at to the one at , shown as a double ratio to the theoretical prediction calculated with the CT10 PDFs as a function of pT in bins of jet rapidity, for anti-kt jets with R=0.4. Also shown are Powheg predictions using Pythia for the simulation of the parton shower and hadronisation with the AUET2B tune and the Perugia 2011 tune. Only the statistical uncertainty is shown on the Powheg predictions. Statistically insignificant data points at large pT are omitted. The 4.3 % uncertainty from the luminosity measurements is not shown
Mentions: A comparison of the jet cross-section ratio as a function of pT to the Powheg prediction is made in Figs. 19 and 20. Differences between the tunes used in Pythia for the parton shower are very small, and deviations are seen only in the forward region for large pT. Like the NLO pQCD prediction with non-perturbative corrections, the Powheg prediction has a different trend in the central rapidity region with respect to data, deviating by more than 10 %. However, it follows the data very well in the forward region. Fig. 19

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