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Measurement of the $t\overline{t}$ production cross-section as a function of jet multiplicity and jet transverse momentum in 7 TeV proton-proton collisions with the ATLAS detector

The collaboration
JHEP 01 (2015) 020, 2015.

Abstract (data abstract)
CERN-LHC. The $t\bar{t}$ production cross-section dependence on jet multiplicity and jet transverse momentum is reported for proton--proton collisions at a centre-of-mass energy of 7 TeV in the single-lepton channel. The data were collected with the ATLAS detector at the CERN Large Hadron Collider and comprise the full 2011 data sample corresponding to an integrated luminosity of 4.6 fb$^{-1}$. Differential cross-sections are presented as a function of the jet multiplicity for up to eight jets using jet transverse momentum thresholds of 25, 40, 60, and 80 GeV, and as a function of jet transverse momentum up to the fifth jet. The results are shown after background subtraction and corrections for all detector effects, within a kinematic range closely matched to the experimental acceptance. Several QCD-based Monte Carlo models are compared with the results. Sensitivity to the parton shower modelling is found at the higher jet multiplicities, at high transverse momentum of the leading jet and in the transverse momentum spectrum of the fifth leading jet. The MC@NLO+HERWIG MC is found to predict too few events at higher jet multiplicities.

• #### Table 1

Data from Figure 6a

10.17182/hepdata.18665.v1/t1

Measurement of the $t\overline{t}$ cross-section as a function of the jet multiplicity for jets with $p_{\mathrm{T}}$ larger than 25 GeV....

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Data from Figure 6b

10.17182/hepdata.18665.v1/t2

Measurement of the $t\overline{t}$ cross-section as a function of the jet multiplicity for jets with $p_{\mathrm{T}}$ larger than 40 GeV....

• #### Table 3

Data from Figure 6c

10.17182/hepdata.18665.v1/t3

Measurement of the $t\overline{t}$ cross-section as a function of the jet multiplicity for jets with $p_{\mathrm{T}}$ larger than 60 GeV....

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Data from Figure 6d

10.17182/hepdata.18665.v1/t4

Measurement of the $t\overline{t}$ cross-section as a function of the jet multiplicity for jets with $p_{\mathrm{T}}$ larger than 80 GeV....

• #### Table 5

Data from Figure 8a

10.17182/hepdata.18665.v1/t5

Measurement of the $t\overline{t}$ cross-section as a function of the transverse momentum of the leading jet in $t\overline{t}$ events. The...

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Data from Figure 8b

10.17182/hepdata.18665.v1/t6

Measurement of the $t\overline{t}$ cross-section as a function of the transverse momentum of the 2nd leading jet in $t\overline{t}$ events....

• #### Table 7

Data from Figure 8c

10.17182/hepdata.18665.v1/t7

Measurement of the $t\overline{t}$ cross-section as a function of the transverse momentum of the 3rd leading jet in $t\overline{t}$ events....

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Data from Figure 8d

10.17182/hepdata.18665.v1/t8

Measurement of the $t\overline{t}$ cross-section as a function of the transverse momentum of the 4th leading jet in $t\overline{t}$ events....

• #### Table 9

Data from Figure 10

10.17182/hepdata.18665.v1/t9

Measurement of the $t\overline{t}$ cross-section as a function of the transverse momentum of the 5th leading jet in $t\overline{t}$ events....