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Measurement of the cross section and angular correlations for associated production of a Z boson with b hadrons in pp collisions at $\sqrt{s} =$ 7 TeV

The CMS collaboration
JHEP 1312 (2013) 039, 2013

Abstract (data abstract)
CERN-LHC. A study of proton-proton collisions in which two b hadrons are produced in association with a Z boson is reported. The collisions were recorded at a centre-of-mass energy of 7 TeV with the CMS detector at the LHC, for an integrated luminosity of 5.2 inverse femtobarns. The b hadrons are identified by means of displaced secondary vertices, without the use of reconstructed jets, permitting the study of b-hadron pair production at small angular separation. Differential cross sections are presented as a function of the angular separation of the b hadrons and the Z boson. In addition, inclusive measurements are presented. For both the inclusive and differential studies, different ranges of Z boson momentum are considered, and each measurement is compared to the predictions from different event generators at leading-order and next-to-leading-order accuracy The channel fiducial region is defined as: - 2e or 2mu, with invariant mass between 81 and 101 GeV, pt>20 GeV, |eta|<2.4. - Exactly 2 b-hadrons with pt> 15 GeV, |eta|<2.0.

  • Table 1

    Data from Fig5 upper left of preprint

    10.17182/hepdata.69342.v1/t1

    Differential cross sections for all p_T^Z, as a function of DeltaR(BB).

  • Table 2

    Data from Fig5 upper right of preprint

    10.17182/hepdata.69342.v1/t2

    Differential cross sections for all p_T^Z, as a function of DeltaiPhi(BB).

  • Table 3

    Data from Fig5 lower left of preprint

    10.17182/hepdata.69342.v1/t3

    Differential cross sections for all p_T^Z, as a function of minDeltaR(Z,B).

  • Table 4

    Data from Fig5 lower right of preprint

    10.17182/hepdata.69342.v1/t4

    Differential cross sections for all p_T^Z, as a function of A(ZBB).

  • Table 5

    Data from Fig6 upper left of preprint

    10.17182/hepdata.69342.v1/t5

    Differential cross sections for p_T^Z>50 GeV, as a function of DeltaR(BB).

  • Table 6

    Data from Fig6 upper right of preprint

    10.17182/hepdata.69342.v1/t6

    Differential cross sections for p_T^Z>50 GeV, as a function of DeltaiPhi(BB).

  • Table 7

    Data from Fig6 lower left of preprint

    10.17182/hepdata.69342.v1/t7

    Differential cross sections for p_T^Z>50 GeV, as a function of minDeltaR(Z,B).

  • Table 8

    Data from Fig6 lower right of preprint

    10.17182/hepdata.69342.v1/t8

    Differential cross sections for p_T^Z>50 GeV, as a function of A(ZBB).

  • Table 9

    Data from Fig7

    10.17182/hepdata.69342.v1/t9

    dsigma, assuming a minimal p_T^Z>x.

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