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Measurement of jet fragmentation in Pb+Pb and $pp$ collisions at $\sqrt{s_\mathrm{NN}} = 2.76$ TeV with the ATLAS detector

The ATLAS collaboration
No Journal Information, 2017

Abstract (data abstract)
CERN-LHC. The distributions of transverse momentum and longitudinal momentum fraction of charged particles in jets are measured in Pb+Pb and pp collisions with the ATLAS detector at the LHC. The distributions are measured as a function of jet transverse momentum and rapidity. The analysis utilises an integrated luminosity of 0.14 nb^{-1} of Pb+Pb data and 4.0 pb^{-1} of pp data collected in 2011 and 2013, respectively, at the same centre-of-mass energy of 2.76 TeV per colliding nucleon pair. The distributions measured in pp collisions are used as a reference for those measured in Pb+Pb collisions in order to evaluate the impact on the internal structure of jets from the jet energy loss of fast partons propagating through the hot, dense medium created in heavy-ion collisions. Modest but significant centrality-dependent modifications of fragmentation functions in Pb+Pb collisions with respect to those in pp collisions are seen. No significant dependence of modifications on jet pt and rapidity selections is observed except for the fragments with the highest transverse momenta for which some reduction of yields is observed for more forward jets.

  • Table 1

    Data from Fig 2

    10.17182/hepdata.77789.v1/t1

    D(pt) distributions for pp and Pb+Pb collisions, jet rapidity |y| < 2.1.

  • Table 2

    Data from Fig 2

    10.17182/hepdata.77789.v1/t2

    D(pt) distributions for pp and Pb+Pb collisions, jet rapidity |y| < 0.3.

  • Table 3

    Data from Fig 2

    10.17182/hepdata.77789.v1/t3

    D(pt) distributions for pp and Pb+Pb collisions, jet rapidity 0.3 < |y| < 0.8.

  • Table 4

    Data from Fig 2

    10.17182/hepdata.77789.v1/t4

    D(pt) distributions for pp and Pb+Pb collisions, jet rapidity 1.2 < |y| < 2.1.

  • Table 5

    Data from Fig 3

    10.17182/hepdata.77789.v1/t5

    D(z) distributions for pp and Pb+Pb collisions, jet rapidity |y| < 2.1.

  • Table 6

    Data from Fig 3

    10.17182/hepdata.77789.v1/t6

    D(z) distributions for pp and Pb+Pb collisions, jet rapidity |y| < 0.3.

  • Table 7

    Data from Fig 3

    10.17182/hepdata.77789.v1/t7

    D(z) distributions for pp and Pb+Pb collisions, jet rapidity 0.3 < |y| < 0.8.

  • Table 8

    Data from Fig 3

    10.17182/hepdata.77789.v1/t8

    D(z) distributions for pp and Pb+Pb collisions, jet rapidity 1.2 < |y| < 2.1.

  • Table 9

    Data from Fig 4

    10.17182/hepdata.77789.v1/t9

    Ratio of D(pt) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 10

    Data from Fig 4

    10.17182/hepdata.77789.v1/t10

    Ratio of D(pt) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 11

    Data from Fig 4

    10.17182/hepdata.77789.v1/t11

    Ratio of D(pt) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 12

    Data from Fig 4

    10.17182/hepdata.77789.v1/t12

    Ratio of D(pt) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 13

    Data from Fig 4

    10.17182/hepdata.77789.v1/t13

    Ratio of D(pt) distributions collisions, centrality 0-10 PCT for jets with |y| < 0.3, 100 < pt < 398 GeV.

  • Table 14

    Data from Fig 4

    10.17182/hepdata.77789.v1/t14

    Ratio of D(pt) distributions collisions, centrality 20-30 PCT for jets with |y| < 0.3, 100 < pt < 398 GeV.

  • Table 15

    Data from Fig 4

    10.17182/hepdata.77789.v1/t15

    Ratio of D(pt) distributions collisions, centrality 30-40 PCT for jets with |y| < 0.3, 100 < pt < 398 GeV.

  • Table 16

    Data from Fig 4

    10.17182/hepdata.77789.v1/t16

    Ratio of D(pt) distributions collisions, centrality 60-80 PCT for jets with |y| < 0.3, 100 < pt < 398 GeV.

  • Table 17

    Data from Fig 4

    10.17182/hepdata.77789.v1/t17

    Ratio of D(pt) distributions collisions, centrality 0-10 PCT for jets with 0.3 < |y| < 0.8, 100 < pt <...

  • Table 18

    Data from Fig 4

    10.17182/hepdata.77789.v1/t18

    Ratio of D(pt) distributions collisions, centrality 20-30 PCT for jets with 0.3 < |y| < 0.8, 100 < pt <...

  • Table 19

    Data from Fig 4

    10.17182/hepdata.77789.v1/t19

    Ratio of D(pt) distributions collisions, centrality 30-40 PCT for jets with 0.3 < |y| < 0.8, 100 < pt <...

  • Table 20

    Data from Fig 4

    10.17182/hepdata.77789.v1/t20

    Ratio of D(pt) distributions collisions, centrality 60-80 PCT for jets with 0.3 < |y| < 0.8, 100 < pt <...

  • Table 21

    Data from Fig 4

    10.17182/hepdata.77789.v1/t21

    Ratio of D(pt) distributions collisions, centrality 0-10 PCT for jets with 1.2 < |y| < 2.1, 100 < pt <...

  • Table 22

    Data from Fig 4

    10.17182/hepdata.77789.v1/t22

    Ratio of D(pt) distributions collisions, centrality 20-30 PCT for jets with 1.2 < |y| < 2.1, 100 < pt <...

  • Table 23

    Data from Fig 4

    10.17182/hepdata.77789.v1/t23

    Ratio of D(pt) distributions collisions, centrality 30-40 PCT for jets with 1.2 < |y| < 2.1, 100 < pt <...

  • Table 24

    Data from Fig 4

    10.17182/hepdata.77789.v1/t24

    Ratio of D(pt) distributions collisions, centrality 60-80 PCT for jets with 1.2 < |y| < 2.1, 100 < pt <...

  • Table 25

    Data from Fig 5

    10.17182/hepdata.77789.v1/t25

    Ratio of D(z) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 26

    Data from Fig 5

    10.17182/hepdata.77789.v1/t26

    Ratio of D(z) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 27

    Data from Fig 5

    10.17182/hepdata.77789.v1/t27

    Ratio of D(z) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 28

    Data from Fig 5

    10.17182/hepdata.77789.v1/t28

    Ratio of D(z) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 29

    Data from Fig 5

    10.17182/hepdata.77789.v1/t29

    Ratio of D(z) distributions collisions, centrality 0-10 PCT for jets with |y| < 0.3, 100 < pt < 398 GeV.

  • Table 30

    Data from Fig 5

    10.17182/hepdata.77789.v1/t30

    Ratio of D(z) distributions collisions, centrality 20-30 PCT for jets with |y| < 0.3, 100 < pt < 398 GeV.

  • Table 31

    Data from Fig 5

    10.17182/hepdata.77789.v1/t31

    Ratio of D(z) distributions collisions, centrality 30-40 PCT for jets with |y| < 0.3, 100 < pt < 398 GeV.

  • Table 32

    Data from Fig 5

    10.17182/hepdata.77789.v1/t32

    Ratio of D(z) distributions collisions, centrality 60-80 PCT for jets with |y| < 0.3, 100 < pt < 398 GeV.

  • Table 33

    Data from Fig 5

    10.17182/hepdata.77789.v1/t33

    Ratio of D(z) distributions collisions, centrality 0-10 PCT for jets with 0.3 < |y| < 0.8, 100 < pt <...

  • Table 34

    Data from Fig 5

    10.17182/hepdata.77789.v1/t34

    Ratio of D(z) distributions collisions, centrality 20-30 PCT for jets with 0.3 < |y| < 0.8, 100 < pt <...

  • Table 35

    Data from Fig 5

    10.17182/hepdata.77789.v1/t35

    Ratio of D(z) distributions collisions, centrality 30-40 PCT for jets with 0.3 < |y| < 0.8, 100 < pt <...

  • Table 36

    Data from Fig 5

    10.17182/hepdata.77789.v1/t36

    Ratio of D(z) distributions collisions, centrality 60-80 PCT for jets with 0.3 < |y| < 0.8, 100 < pt <...

  • Table 37

    Data from Fig 5

    10.17182/hepdata.77789.v1/t37

    Ratio of D(z) distributions collisions, centrality 0-10 PCT for jets with 1.2 < |y| < 2.1, 100 < pt <...

  • Table 38

    Data from Fig 5

    10.17182/hepdata.77789.v1/t38

    Ratio of D(z) distributions collisions, centrality 20-30 PCT for jets with 1.2 < |y| < 2.1, 100 < pt <...

  • Table 39

    Data from Fig 5

    10.17182/hepdata.77789.v1/t39

    Ratio of D(z) distributions collisions, centrality 30-40 PCT for jets with 1.2 < |y| < 2.1, 100 < pt <...

  • Table 40

    Data from Fig 5

    10.17182/hepdata.77789.v1/t40

    Ratio of D(z) distributions collisions, centrality 60-80 PCT for jets with 1.2 < |y| < 2.1, 100 < pt <...

  • Table 41

    Data from Fig 6

    10.17182/hepdata.77789.v1/t41

    Ratio of D(pt) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 42

    Data from Fig 6

    10.17182/hepdata.77789.v1/t42

    Ratio of D(pt) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 43

    Data from Fig 6

    10.17182/hepdata.77789.v1/t43

    Ratio of D(pt) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 44

    Data from Fig 6

    10.17182/hepdata.77789.v1/t44

    Ratio of D(pt) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 45

    Data from Fig 6

    10.17182/hepdata.77789.v1/t45

    Ratio of D(pt) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 100 < pt < 126 GeV.

  • Table 46

    Data from Fig 6

    10.17182/hepdata.77789.v1/t46

    Ratio of D(pt) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 100 < pt < 126 GeV.

  • Table 47

    Data from Fig 6

    10.17182/hepdata.77789.v1/t47

    Ratio of D(pt) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 100 < pt < 126 GeV.

  • Table 48

    Data from Fig 6

    10.17182/hepdata.77789.v1/t48

    Ratio of D(pt) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 100 < pt < 126 GeV.

  • Table 49

    Data from Fig 6

    10.17182/hepdata.77789.v1/t49

    Ratio of D(pt) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 126 < pt < 158 GeV.

  • Table 50

    Data from Fig 6

    10.17182/hepdata.77789.v1/t50

    Ratio of D(pt) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 126 < pt < 158 GeV.

  • Table 51

    Data from Fig 6

    10.17182/hepdata.77789.v1/t51

    Ratio of D(pt) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 126 < pt < 158 GeV.

  • Table 52

    Data from Fig 6

    10.17182/hepdata.77789.v1/t52

    Ratio of D(pt) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 126 < pt < 158 GeV.

  • Table 53

    Data from Fig 6

    10.17182/hepdata.77789.v1/t53

    Ratio of D(pt) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 158 < pt < 398 GeV.

  • Table 54

    Data from Fig 6

    10.17182/hepdata.77789.v1/t54

    Ratio of D(pt) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 158 < pt < 398 GeV.

  • Table 55

    Data from Fig 6

    10.17182/hepdata.77789.v1/t55

    Ratio of D(pt) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 158 < pt < 398 GeV.

  • Table 56

    Data from Fig 6

    10.17182/hepdata.77789.v1/t56

    Ratio of D(pt) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 158 < pt < 398 GeV.

  • Table 57

    Data from Fig 7

    10.17182/hepdata.77789.v1/t57

    Ratio of D(z) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 58

    Data from Fig 7

    10.17182/hepdata.77789.v1/t58

    Ratio of D(z) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 59

    Data from Fig 7

    10.17182/hepdata.77789.v1/t59

    Ratio of D(z) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 60

    Data from Fig 7

    10.17182/hepdata.77789.v1/t60

    Ratio of D(z) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 100 < pt < 398 GeV.

  • Table 61

    Data from Fig 7

    10.17182/hepdata.77789.v1/t61

    Ratio of D(z) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 100 < pt < 126 GeV.

  • Table 62

    Data from Fig 7

    10.17182/hepdata.77789.v1/t62

    Ratio of D(z) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 100 < pt < 126 GeV.

  • Table 63

    Data from Fig 7

    10.17182/hepdata.77789.v1/t63

    Ratio of D(z) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 100 < pt < 126 GeV.

  • Table 64

    Data from Fig 7

    10.17182/hepdata.77789.v1/t64

    Ratio of D(z) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 100 < pt < 126 GeV.

  • Table 65

    Data from Fig 7

    10.17182/hepdata.77789.v1/t65

    Ratio of D(z) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 126 < pt < 158 GeV.

  • Table 66

    Data from Fig 7

    10.17182/hepdata.77789.v1/t66

    Ratio of D(z) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 126 < pt < 158 GeV.

  • Table 67

    Data from Fig 7

    10.17182/hepdata.77789.v1/t67

    Ratio of D(z) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 126 < pt < 158 GeV.

  • Table 68

    Data from Fig 7

    10.17182/hepdata.77789.v1/t68

    Ratio of D(z) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 126 < pt < 158 GeV.

  • Table 69

    Data from Fig 7

    10.17182/hepdata.77789.v1/t69

    Ratio of D(z) distributions collisions, centrality 0-10 PCT for jets with |y| < 2.1, 158 < pt < 398 GeV.

  • Table 70

    Data from Fig 7

    10.17182/hepdata.77789.v1/t70

    Ratio of D(z) distributions collisions, centrality 20-30 PCT for jets with |y| < 2.1, 158 < pt < 398 GeV.

  • Table 71

    Data from Fig 7

    10.17182/hepdata.77789.v1/t71

    Ratio of D(z) distributions collisions, centrality 30-40 PCT for jets with |y| < 2.1, 158 < pt < 398 GeV.

  • Table 72

    Data from Fig 7

    10.17182/hepdata.77789.v1/t72

    Ratio of D(z) distributions collisions, centrality 60-80 PCT for jets with |y| < 2.1, 158 < pt < 398 GeV.

  • Table 73

    Data from Fig 8

    10.17182/hepdata.77789.v1/t73

    The difference between the total yield of particles with 1 < pt^trk < 4 GeV measured in 0-80 PCT Pb+Pb...

  • Table 74

    Data from Fig 8

    10.17182/hepdata.77789.v1/t74

    The difference between the total yield of particles with 4 < pt^trk < 25 GeV measured in 0-80 PCT Pb+Pb...

  • Table 75

    Data from Fig 8

    10.17182/hepdata.77789.v1/t75

    The difference between the total yield of particles with 25 < pt^trk < 100 GeV measured in 0-80 PCT Pb+Pb...

  • Table 76

    Data from Fig 8

    10.17182/hepdata.77789.v1/t76

    The difference between the total transverse momentum of particles with 1 < pt^trk < 4 GeV measured in 0-80 PCT...

  • Table 77

    Data from Fig 8

    10.17182/hepdata.77789.v1/t77

    The difference between the total transverse momentum of particles with 4 < pt^trk < 25 GeV measured in 0-80 PCT...

  • Table 78

    Data from Fig 8

    10.17182/hepdata.77789.v1/t78

    The difference between the total transverse momentum of particles with 25 < pt^trk < 100 GeV measured in 0-80 PCT...

  • Table 79

    Data from Fig 9

    10.17182/hepdata.77789.v1/t79

    The ratio of R_D(z) distributions in three rapidity selections for 0-10 PCT Pb+Pb collisions.

  • Table 80

    Data from Fig 9

    10.17182/hepdata.77789.v1/t80

    The ratio of R_D(z) distributions in three rapidity selections for 10-20 PCT Pb+Pb collisions.

  • Table 81

    Data from Fig 9

    10.17182/hepdata.77789.v1/t81

    The ratio of R_D(z) distributions in three rapidity selections for 20-30 PCT Pb+Pb collisions.

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