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Measurement of prompt and nonprompt charmonium suppression in PbPb collisions at 5.02 TeV

The CMS collaboration
No Journal Information, 2017

Abstract (data abstract)
CERN-LHC. The nuclear modification factors of J/psi and psi(2S) mesons are measured in PbPb collisions at a centre-of-mass energy per nucleon pair of 5.02 TeV. The analysis is based on PbPb and pp data samples collected by CMS at the LHC in 2015, corresponding to integrated luminosities of 464 inverse microbarns and 28 inverse picobarns, respectively. The measurements are performed in the dimuon rapidity range of abs(y)< 2.4 as a function of centrality, rapidity, and transverse momentum (pT) from pT= 3 GeV/c in the most forward region and up to 50 GeV/c. Both prompt and nonprompt (coming from b hadron decays) J/psi mesons are observed to be increasingly suppressed with centrality, with a magnitude similar to the one observed at 2.76 TeV for the two J/psi meson components. No dependence on rapidity is observed for either prompt or nonprompt J/psi mesons. An indication of a lower prompt J/psi meson suppression at pT > 25 GeV/c is seen with respect to that observed at intermediate pT. The prompt psi(2S) meson yield is found to be more suppressed than that of the prompt J/psi mesons in the entire pT range.

  • Table 1

    Data from Figure 2a

    10.17182/hepdata.80816.v1/t1

    Fraction of J/psi mesons coming from the decay of b hadrons, i.e. nonprompt J/psi meson fraction, as a function of...

  • Table 2

    Data from Figure 2b

    10.17182/hepdata.80816.v1/t2

    Fraction of J/psi mesons coming from the decay of b hadrons, i.e. nonprompt J/psi meson fraction, as a function of...

  • Table 3

    Data from Figure 3a

    10.17182/hepdata.80816.v1/t3

    Differential cross section of prompt J/psi mesons as a function of dimuon pT in pp and PbPb collisions. The PbPb...

  • Table 4

    Data from Figure 3b

    10.17182/hepdata.80816.v1/t4

    Differential cross section of J/psi mesons from b hadrons as a function of dimuon pT in pp and PbPb collisions....

  • Table 5

    Data from Figure 3c

    10.17182/hepdata.80816.v1/t5

    Differential cross section of prompt J/psi mesons as a function of dimuon rapidty in pp and PbPb collisions. The PbPb...

  • Table 6

    Data from Figure 3d

    10.17182/hepdata.80816.v1/t6

    Differential cross section of J/psi mesons from b hadrons as a function of dimuon rapidty in pp and PbPb collisions....

  • Table 7

    Data from Figure 4a

    10.17182/hepdata.80816.v1/t7

    Nuclear modification factor of prompt J/psi mesons as a function of dimuon rapidity. Global uncertainties arise from the integrated luminosity...

  • Table 8

    Data from Figure 4b

    10.17182/hepdata.80816.v1/t8

    Nuclear modification factor of prompt J/psi mesons as a function of collision centrality. Global uncertainties arise from the full pp...

  • Table 9

    Data from Figure 4c

    10.17182/hepdata.80816.v1/t9

    Nuclear modification factor of prompt J/psi mesons as a function of dimuon pT. Global uncertainties arise from the integrated luminosity...

  • Table 10

    Data from Figure 5a

    10.17182/hepdata.80816.v1/t10

    Nuclear modification factor of prompt J/psi mesons as a function of dimuon pT in the mid-rapidity interval. Global uncertainties arise...

  • Table 11

    Data from Figure 5a

    10.17182/hepdata.80816.v1/t11

    Nuclear modification factor of prompt J/psi mesons as a function of dimuon pT in the most forward rapidity interval. Global...

  • Table 12

    Data from Figure 5b

    10.17182/hepdata.80816.v1/t12

    Nuclear modification factor of prompt J/psi mesons as a function of collision centrality in the mid- and most forward rapidity...

  • Table 13

    Data from Figure 6a

    10.17182/hepdata.80816.v1/t13

    Nuclear modification factor of prompt J/psi mesons as a function of pT in three centrality bins. Global uncertainties arise from...

  • Table 14

    Data from Figure 6b

    10.17182/hepdata.80816.v1/t14

    Nuclear modification factor of prompt J/psi mesons as a function of collision centrality in the most forward rapidity range at...

  • Table 15

    Data from Figure 7a

    10.17182/hepdata.80816.v1/t15

    Nuclear modification factor of prompt J/psi mesons as a function of collision centrality in the mid-rapidity range. Global uncertainties arise...

  • Table 16

    Data from Figure 7a

    10.17182/hepdata.80816.v1/t16

    Nuclear modification factor of prompt psi(2S) mesons as a function of collision centrality in the mid-rapidity range. Global uncertainties arise...

  • Table 17

    Data from Figure 7a

    10.17182/hepdata.80816.v1/t17

    95% CL intervals on the nuclear modification factor of prompt psi(2S) mesons as a function of collision centrality in the...

  • Table 18

    Data from Figure 7b

    10.17182/hepdata.80816.v1/t18

    Nuclear modification factor of prompt J/psi and psi(2S) mesons as a function of dimuon pT in the mid-rapidity range. Global...

  • Table 19

    Data from Figure 7c

    10.17182/hepdata.80816.v1/t19

    Nuclear modification factor of prompt J/psi mesons as a function of collision centrality in the forward rapidity range. Global uncertainties...

  • Table 20

    Data from Figure 7c

    10.17182/hepdata.80816.v1/t20

    Nuclear modification factor of prompt psi(2S) mesons as a function of collision centrality in the forward rapidity range. Global uncertainties...

  • Table 21

    Data from Figure 7c

    10.17182/hepdata.80816.v1/t21

    95% CL intervals on the nuclear modification factor of prompt psi(2S) mesons as a function of collision centrality in the...

  • Table 22

    Data from Figure 7d

    10.17182/hepdata.80816.v1/t22

    Nuclear modification factor of prompt J/psi mesons as a function of dimuon pT in the forward rapidity range. Global uncertainties...

  • Table 23

    Data from Figure 7d

    10.17182/hepdata.80816.v1/t23

    Nuclear modification factor of prompt psi(2S) mesons as a function of dimuon pT in the forward rapidity range. Global uncertainties...

  • Table 24

    Data from Figure 7d

    10.17182/hepdata.80816.v1/t24

    95% CL intervals on the nuclear modification factor of prompt psi(2S) mesons as a function of dimuon pT in the...

  • Table 25

    Data from Figure 8a

    10.17182/hepdata.80816.v1/t25

    Nuclear modification factor of nonprompt J/psi mesons as a function of dimuon rapidity. Global uncertainties arise from the integrated luminosity...

  • Table 26

    Data from Figure 8b

    10.17182/hepdata.80816.v1/t26

    Nuclear modification factor of nonprompt J/psi mesons as a function of collision centrality. Global uncertainties arise from the full pp...

  • Table 27

    Data from Figure 8c

    10.17182/hepdata.80816.v1/t27

    Nuclear modification factor of nonprompt J/psi mesons as a function of dimuon pT. Global uncertainties arise from the integrated luminosity...

  • Table 28

    Data from Figure 9a

    10.17182/hepdata.80816.v1/t28

    Nuclear modification factor of nonprompt J/psi mesons as a function of dimuon pT in the mid-rapidity interval. Global uncertainties arise...

  • Table 29

    Data from Figure 9a

    10.17182/hepdata.80816.v1/t29

    Nuclear modification factor of nonprompt J/psi mesons as a function of dimuon pT in the most forward rapidity interval. Global...

  • Table 30

    Data from Figure 9b

    10.17182/hepdata.80816.v1/t30

    Nuclear modification factor of nonprompt J/psi mesons as a function of collision centrality in the mid- and most forward rapidity...

  • Table 31

    Data from Figure 10a

    10.17182/hepdata.80816.v1/t31

    Nuclear modification factor of nonprompt J/psi mesons as a function of pT in three centrality bins. Global uncertainties arise from...

  • Table 32

    Data from Figure 10b

    10.17182/hepdata.80816.v1/t32

    Nuclear modification factor of nonprompt J/psi mesons as a function of collision centrality in the most forward rapidity range at...

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