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Transverse momentum spectra of inclusive b jets in pPb collisions at $\sqrt{s_{NN}} = $ 5.02 TeV

The CMS collaboration
Phys.Lett. B754 (2016) 59, 2016

Abstract (data abstract)
CERN-LHC. We present a measurement of b jet transverse momentum (pt) spectra in proton-lead (pPb) collisions using a dataset corresponding to about 35 inverse nanobarns collected with the CMS detector at the LHC. Jets from b quark fragmentation are found by exploiting the long lifetime of hadrons containing a b quark through tagging methods using distributions of the secondary vertex mass and displacement. Extracted cross sections for b jets are scaled by the effective number of nucleon-nucleon collisions and are compared to a reference obtained from PYTHIA simulations of pp collisions. The PYTHIA-based estimate of the nuclear modification factor is found to be 1.22 +/- 0.15 (stat + syst pPb) +/- 0.27 (syst PYTHIA) averaged over all jets with pt between 55 and 400 GeV/c and with abs(eta[lab]) < 2. We also compare this result to predictions from models using perturbative calculations in quantum chromodynamics.

  • Table 1

    Data from Figure 1, Left

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    Distributions of the JP tagger discriminator before applying the SSV tagger selection.

  • Table 2

    Data from Figure 1, Right

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    Distributions of the JP tagger discriminator after applying the SSV tagger selection.

  • Table 3

    Data from Figure 2, Left

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    Distributions of the b-tagging efficiency as a function of the mistag rate of light jets for pp collisions in a...

  • Table 4

    Data from Figure 2, Left

    10.17182/hepdata.72511.v1/t4

    Distributions of the b-tagging efficiency as a function of the mistag rate of charm jets for pp collisions in a...

  • Table 5

    Data from Figure 2, Left

    10.17182/hepdata.72511.v1/t5

    Distributions of the b-tagging efficiency as a function of the mistag rate of light jets for pPb collisions in a...

  • Table 6

    Data from Figure 2, Left

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    Distributions of the b-tagging efficiency as a function of the mistag rate of charm jets for pPb collisions in a...

  • Table 7

    Data from Figure 2, Right

    10.17182/hepdata.72511.v1/t7

    Distributions of the Secondary Vertex Mass after applying the SSV tagger selection.

  • Table 8

    Data from Figure 3, Left

    10.17182/hepdata.72511.v1/t8

    b-jet cross-sections in pPb, scaled by the Glauber nuclear overlap function, as well as a b-jet cross-section from a PYTHIA...

  • Table 9

    Data from Figure 3, Left

    10.17182/hepdata.72511.v1/t9

    b-jet cross-sections in pPb, scaled by the Glauber nuclear overlap function, as well as a b-jet cross-section from a PYTHIA...

  • Table 10

    Data from Figure 3, Left

    10.17182/hepdata.72511.v1/t10

    b-jet cross-sections in pPb, scaled by the Glauber nuclear overlap function, as well as a b-jet cross-section from a PYTHIA...

  • Table 11

    Data from Figure 3, Left

    10.17182/hepdata.72511.v1/t11

    b-jet cross-sections in pPb, scaled by the Glauber nuclear overlap function, as well as a b-jet cross-section from a PYTHIA...

  • Table 12

    Data from Figure 3, Right, Top Panel

    10.17182/hepdata.72511.v1/t12

    b-jet RpA (PYTHIA) from 0.5 < eta_CM < 1.5.

  • Table 13

    Data from Figure 3, Right, 2nd Panel from Top

    10.17182/hepdata.72511.v1/t13

    b-jet RpA (PYTHIA) from -0.5 < eta_CM < 0.5.

  • Table 14

    Data from Figure 3, Right, 3rd Panel from Top

    10.17182/hepdata.72511.v1/t14

    b-jet RpA (PYTHIA) from -1.5 < eta_CM < -0.5.

  • Table 15

    Data from Figure 3, Right, Bottom Panel

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    b-jet RpA (PYTHIA) from -2.5 < eta_CM < -1.5.

  • Table 16

    Data from Figure 4

    10.17182/hepdata.72511.v1/t16

    b-jet Fraction.

  • Table 17

    Data from Figure 5

    10.17182/hepdata.72511.v1/t17

    b-jet RpA(PYTHIA).

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