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Measurement of the inclusive 3-jet production differential cross section in proton–proton collisions at 7 TeV and determination of the strong coupling constant in the TeV range

The CMS collaboration
Eur.Phys.J. C75 (2015) 186, 2015

Abstract (data abstract)
CERN-LHC. This paper presents a measurement of the inclusive 3-jet production differential cross section at a proton-proton centre-of-mass energy of 7 TeV using data corresponding to an integrated luminosity of 5 inverse femtobarns collected with the CMS detector. The analysis is based on the three jets with the highest transverse momenta. The cross section is measured as a function of the invariant mass of the three jets in a range of 445-3270 GeV and in two bins of the maximum rapidity of the jets up to a value of 2. A comparison between the measurement and the prediction from perturbative QCD at next-to-leading order is performed. Within uncertainties, data and theory are in agreement. The sensitivity of the observable to the strong coupling constant alpha[S] is studied. A fit to all data points with 3-jet masses larger than 664 GeV gives a value of the strong coupling constant of $\alpha_S(\mathrm{M}_\mathrm{Z}) = 0.1171 \pm 0.0013 \mathrm{(exp)} {}^{+0.0073}_{-0.0047} \mathrm{(theo)}$.

  • Table 1

    Data from Figure 1 (uncertainty) + Figure 4 (measurement)

    10.17182/hepdata.70049.v1/t1

    Measured 3-jet mass cross section with uncertainties.

  • Table 2

    Data from Figure 2

    10.17182/hepdata.70049.v1/t2

    Overview of the NP correction factors and their uncertainties in the inner and outer rapidity region.

  • Table 3

    Data from Table 3

    10.17182/hepdata.70049.v1/t3

    Determinations of $\alpha_s(M_Z)$ in the considered $m_3$ ranges.

  • Table 4

    Data from Table 3a

    10.17182/hepdata.70049.v1/t4

    Determinations of $\alpha_s(M_Z)$ in the considered $y_{max}$ ranges.

  • Table 5

    Data from Table 4

    10.17182/hepdata.70049.v1/t5

    Determinations of $\alpha_s(Q)$ in the considered $m_3$ ranges.

  • Table 6

    Data from not given in the paper

    10.17182/hepdata.70049.v1/t6

    Covariance matrices for experimental uncertainties.

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