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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

The systematic uncertainty on the inclusive jet cross-section measurement for anti-kt jets with R=0.6 in three representative rapidity bins, as a function of the jet pT. In addition to the total uncertainty, the uncertainties from the jet energy scale (JES), the jet energy resolution (JER), the unfolding procedure and the other systematic sources are shown separately. The 2.7 % uncertainty from the luminosity measurement and the statistical uncertainty are not shown
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Fig5: The systematic uncertainty on the inclusive jet cross-section measurement for anti-kt jets with R=0.6 in three representative rapidity bins, as a function of the jet pT. In addition to the total uncertainty, the uncertainties from the jet energy scale (JES), the jet energy resolution (JER), the unfolding procedure and the other systematic sources are shown separately. The 2.7 % uncertainty from the luminosity measurement and the statistical uncertainty are not shown

Mentions: The evaluated systematic uncertainties on the measured cross-section are added in quadrature and shown in Fig. 5 for representative rapidity bins and R=0.6. Results for jets with R=0.4 are similar. The systematic uncertainty on this measurement is driven by the uncertainties on the JES. The very steeply falling jet pT spectrum, especially for large rapidity, transforms even relatively modest uncertainties on the transverse momentum into large changes in the measured differential cross-section. The uncertainty on the jet energy resolution also has a sizable effect on the total systematic uncertainty of the measurement in the low pT bins. Other sources of uncertainty are found to have a smaller impact on the results. Fig. 5


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 systematic uncertainty on the inclusive jet cross-section measurement for anti-kt jets with R=0.6 in three representative rapidity bins, as a function of the jet pT. In addition to the total uncertainty, the uncertainties from the jet energy scale (JES), the jet energy resolution (JER), the unfolding procedure and the other systematic sources are shown separately. The 2.7 % uncertainty from the luminosity measurement and the statistical uncertainty are not shown
© Copyright Policy
Related In: Results  -  Collection

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

Fig5: The systematic uncertainty on the inclusive jet cross-section measurement for anti-kt jets with R=0.6 in three representative rapidity bins, as a function of the jet pT. In addition to the total uncertainty, the uncertainties from the jet energy scale (JES), the jet energy resolution (JER), the unfolding procedure and the other systematic sources are shown separately. The 2.7 % uncertainty from the luminosity measurement and the statistical uncertainty are not shown
Mentions: The evaluated systematic uncertainties on the measured cross-section are added in quadrature and shown in Fig. 5 for representative rapidity bins and R=0.6. Results for jets with R=0.4 are similar. The systematic uncertainty on this measurement is driven by the uncertainties on the JES. The very steeply falling jet pT spectrum, especially for large rapidity, transforms even relatively modest uncertainties on the transverse momentum into large changes in the measured differential cross-section. The uncertainty on the jet energy resolution also has a sizable effect on the total systematic uncertainty of the measurement in the low pT bins. Other sources of uncertainty are found to have a smaller impact on the results. Fig. 5

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