Abstract (data abstract)

CERN-LHC. Measurements are presented of the cross section for the production of at least four jets, of which at least two originate from b quarks, in proton-proton collisions. Data collected with the CMS detector at the LHC at a center-of-mass energy of 7 TeV are used, corresponding to an integrated luminosity of 3 pb inverse. The cross section is measured as a function of the jet transverse momentum for pT > 20 GeV, and of the jet pseudorapidity for |eta| < 2.4 (b jets), 4.7 (untagged jets). The correlations in azimuthal angle and pT between the jets are also studied. The inclusive cross section is measured to be sigma(pp -> 2 b + 2 j + X) = 69 +- 3 (stat) +- 24 (syst) nb. The eta and pT distributions of the four jets and the correlations between them are well reproduced by event generators that combine perturbative QCD calculations at next-to-leading-order accuracy with contributions from parton showers and multiparton interactions. The four-jet fiducial region is defined as: - at least four jets in the final state in |eta|<4.7 and with pT > 20 GeV. - Two jets are required to contain a bottom quark at a smaller distance than 0.3 in DeltaR.

Table 1

Data from Table 1

10.17182/hepdata.75375.v1/t1

The measured fiducial cross section. The first uncertainty is the statistical one, the second uncertainty is the combined systematic uncertainty...
Table 2

Data from Figure 1

10.17182/hepdata.75375.v1/t2

Differential cross section as a function of the transverse momentum PT of the leading b-jet. The first uncertainty is the...
Table 3

Data from Figure 1

10.17182/hepdata.75375.v1/t3

Differential cross section as a function of the transverse momentum PT of the subleading b-jet. The first uncertainty is the...
Table 4

Data from Figure 1

10.17182/hepdata.75375.v1/t4

Differential cross section as a function of the transverse momentum PT of the leading other jet. The first uncertainty is...
Table 5

Data from Figure 1

10.17182/hepdata.75375.v1/t5

Differential cross section as a function of the transverse momentum PT of the subleading other jet. The first uncertainty is...
Table 6

Data from Figure 1

10.17182/hepdata.75375.v1/t6

Differential cross section as a function of the pseudorapidity ETA of the leading b-jet. The first uncertainty is the statistical...
Table 7

Data from Figure 1

10.17182/hepdata.75375.v1/t7

Differential cross section as a function of the pseudorapidity ETA of the subleading b-jet. The first uncertainty is the statistical...
Table 8

Data from Figure 1

10.17182/hepdata.75375.v1/t8

Differential cross section as a function of the pseudorapidity ETA of the leading other jet. The first uncertainty is the...
Table 9

Data from Figure 1

10.17182/hepdata.75375.v1/t9

Differential cross section as a function of the pseudorapidity ETA of the subleading other jet. The first uncertainty is the...
Table 10

Data from Figure 3

10.17182/hepdata.75375.v1/t10

Differential cross section as a function of the azimuthal angle DeltaPhi between the two other jets, normalized to the total...
Table 11

Data from Figure 4

10.17182/hepdata.75375.v1/t11

Differential cross section as a function of the normalized PT balance DELTARELPT between the third and the fourth jet, normalized...
Table 12

Data from Figure 5

10.17182/hepdata.75375.v1/t12

Differential cross section as a function of the azimuthal angle between the two dijet planes (leading-subleading b- and leading-subleading other...

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