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Measurement of $\mathrm {t}\overline{\mathrm {t}}$ production with additional jet activity, including $\mathrm {b}$ quark jets, in the dilepton decay channel using pp collisions at $\sqrt{s} =$ 8 TeV

The CMS collaboration
Eur.Phys.J. C76 (2016) 379, 2016

Abstract (data abstract)
Jet multiplicity distributions in top quark pair (ttbar) events are measured in pp collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC using a data set corresponding to an integrated luminosity of 19.7 inverse-femtobarns. The measurement is performed in the dilepton decay channels (e+ e-, mu+ mu-, and e+/- mu-/+). The absolute and normalized differential cross sections for t-tbar production are measured as a function of the jet multiplicity in the event for different jet transverse momentum thresholds and the kinematic properties of the leading additional jets. The differential t-tbar-b and t-tbar-b-bbar cross sections are presented for the first time as a function of the kinematic properties of the leading additional b jets. Furthermore, the fraction of events without additional jets above a threshold is measured as a function of the transverse momenta of the leading additional jets and the scalar sum of the transverse momenta of all additional jets. The data are compared and found to be consistent with predictions from several perturbative quantum chromodynamics event generators and a next-to-leading order calculation.

  • Table 1

    Data from Page 48 of preprint, table B.1, top 5 lines of table, jet multiplicity (ptjet>30 GeV)

    10.17182/hepdata.70880.v1/t1

    Absolute differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 30GeV, along with...

  • Table 2

    Data from Page 48 of preprint, table B.1, top 5 lines of table, jet multiplicity (ptjet>30 GeV)

    10.17182/hepdata.70880.v1/t2

    Normalized differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 30GeV, along with...

  • Table 3

    Data from Page 48 of preprint, table B.1, lines 6 to 11 of table, jet multiplicity (ptjet>60 GeV)

    10.17182/hepdata.70880.v1/t3

    Absolute differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 60GeV, along with...

  • Table 4

    Data from Page 48 of preprint, table B.1, lines 6 to 11 of table, jet multiplicity (ptjet>60 GeV)

    10.17182/hepdata.70880.v1/t4

    Normalized differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 60GeV, along with...

  • Table 5

    Data from Page 48 of preprint, table B.1, lines 12 to 16 of table, jet multiplicity (ptjet>100 GeV)

    10.17182/hepdata.70880.v1/t5

    Absolute differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 100GeV, along with...

  • Table 6

    Data from Page 48 of preprint, table B.1, lines 12 to 16 of table, jet multiplicity (ptjet>100 GeV)

    10.17182/hepdata.70880.v1/t6

    Normalized differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 100GeV, along with...

  • Table 7

    Data from Page 49 of preprint, table B.2, top 5 lines of table,

    10.17182/hepdata.70880.v1/t7

    Absolute differential ttbar cross sections as a function of the pt of the leading additional jet in the event (not...

  • Table 8

    Data from Page 49 of preprint, table B.2, top 5 lines of table,

    10.17182/hepdata.70880.v1/t8

    Normalized differential ttbar cross sections as a function of the pt of the leading additional jet in the event (not...

  • Table 9

    Data from Page 49 of preprint, table B.2, lower 4 lines of table,

    10.17182/hepdata.70880.v1/t9

    Absolute differential ttbar cross sections as a function of the eta of the leading additional jet in the event (not...

  • Table 10

    Data from Page 49 of preprint, table B.2, lower 4 lines of table,

    10.17182/hepdata.70880.v1/t10

    Normalized differential ttbar cross sections as a function of the eta of the leading additional jet in the event (not...

  • Table 11

    Data from Page 49 of preprint, table B.3, top 5 lines of table,

    10.17182/hepdata.70880.v1/t11

    Absolute differential ttbar cross sections as a function of the pt of the subleading additional jet in the event (not...

  • Table 12

    Data from Page 49 of preprint, table B.3, top 5 lines of table,

    10.17182/hepdata.70880.v1/t12

    Normalized differential ttbar cross sections as a function of the pt of the subleading additional jet in the event (not...

  • Table 13

    Data from Page 49 of preprint, table B.3, lower 4 lines of table,

    10.17182/hepdata.70880.v1/t13

    Absolute differential ttbar cross sections as a function of |eta| of the subleading additional jet in the event (not coming...

  • Table 14

    Data from Page 49 of preprint, table B.3, lower 4 lines of table,

    10.17182/hepdata.70880.v1/t14

    Normalized differential ttbar cross sections as a function of |eta| of the subleading additional jet in the event (not coming...

  • Table 15

    Data from Page 50 of preprint, table B.4, top 4 lines of table,

    10.17182/hepdata.70880.v1/t15

    Absolute differential ttbar cross sections as a function of the invariant mass of the two leading additional jets in the...

  • Table 16

    Data from Page 50 of preprint, table B.4, top 4 lines of table,

    10.17182/hepdata.70880.v1/t16

    Normalized differential ttbar cross sections as a function of the invariant mass of the two leading additional jets in the...

  • Table 17

    Data from Page 50 of preprint, table B.4, lines 5 to 9 of table,

    10.17182/hepdata.70880.v1/t17

    Absolute differential ttbar cross sections as a function of the angle DeltaR between the two leading additional jets in the...

  • Table 18

    Data from Page 50 of preprint, table B.4, lines 5 to 9 of table,

    10.17182/hepdata.70880.v1/t18

    Normalized differential ttbar cross sections as a function of the angle DeltaR between the two leading additional jets in the...

  • Table 19

    Data from Page 50 of preprint, table B.4, lower 5 lines of table,

    10.17182/hepdata.70880.v1/t19

    Absolute differential ttbar cross sections as a function of the observable HT, along with their statistical and systematic uncertainties. The...

  • Table 20

    Data from Page 50 of preprint, table B.4, lower 5 lines of table,

    10.17182/hepdata.70880.v1/t20

    Normalized differential ttbar cross sections as a function of the observable HT, along with their statistical and systematic uncertainties. The...

  • Table 21

    Data from Page 51 of preprint, table B.5, top 5 lines of table,

    10.17182/hepdata.70880.v1/t21

    Absolute differential ttbar cross sections as a function of the pt of the leading additional jet j1 in the event...

  • Table 22

    Data from Page 51 of preprint, table B.5, top 5 lines of table,

    10.17182/hepdata.70880.v1/t22

    Normalized differential ttbar cross sections as a function of pt of the leading additional jet j1 in the event (not...

  • Table 23

    Data from Page 51 of preprint, table B.5, lower 4 lines of table,

    10.17182/hepdata.70880.v1/t23

    Absolute differential ttbar cross sections as a function of |eta| of the leading additional jet j1 in the event (not...

  • Table 24

    Data from Page 51 of preprint, table B.5, lower 4 lines of table,

    10.17182/hepdata.70880.v1/t24

    Normalized differential ttbar cross sections as a function of |eta| of the leading additional jet j1 in the event (not...

  • Table 25

    Data from Page 51 of preprint, table B.6, top 5 lines of table,

    10.17182/hepdata.70880.v1/t25

    Absolute differential ttbar cross sections as a function of the pt of the subleading additional jet j2 in the event...

  • Table 26

    Data from Page 51 of preprint, table B.6, top 5 lines of table,

    10.17182/hepdata.70880.v1/t26

    Normalized differential ttbar cross sections as a function of pt of the subleading additional jet j2 in the event (not...

  • Table 27

    Data from Page 51 of preprint, table B.6, lower 4 lines of table,

    10.17182/hepdata.70880.v1/t27

    Absolute differential ttbar cross sections as a function of |eta| of the subleading additional jet j2 in the event (not...

  • Table 28

    Data from Page 51 of preprint, table B.6, lower 4 lines of table,

    10.17182/hepdata.70880.v1/t28

    Normalized differential ttbar cross sections as a function of |eta| of the subleading additional jet j2 in the event (not...

  • Table 29

    Data from Page 52 of preprint, table B.7, top 4 lines of table,

    10.17182/hepdata.70880.v1/t29

    Absolute differential ttbar cross sections as a function of the invariant mass of the two leading additional jets in the...

  • Table 30

    Data from Page 52 of preprint, table B.7, top 4 lines of table,

    10.17182/hepdata.70880.v1/t30

    Normalized differential ttbar cross sections as a function of the invariant mass of the two leading additional jets in the...

  • Table 31

    Data from Page 52 of preprint, table B.7, lines 5 to 9 of table,

    10.17182/hepdata.70880.v1/t31

    Absolute differential ttbar cross sections as a function of the angle DeltaR between the two leading additional jets in the...

  • Table 32

    Data from Page 52 of preprint, table B.7, lines 5 to 9 of table,

    10.17182/hepdata.70880.v1/t32

    Normalized differential ttbar cross sections as a function of the angle DeltaR between the two leading additional jets in the...

  • Table 33

    Data from Page 52 of preprint, table B.7, lower 5 lines of table,

    10.17182/hepdata.70880.v1/t33

    Absolute differential ttbar cross sections as a function of the observable HT, along with their statistical and systematic uncertainties. The...

  • Table 34

    Data from Page 52 of preprint, table B.7, lower 5 lines of table,

    10.17182/hepdata.70880.v1/t34

    Normalized differential ttbar cross sections as a function of the observable HT, along with their statistical and systematic uncertainties. The...

  • Table 35

    Data from Page 53 of preprint, table B.8, top 4 lines of table,

    10.17182/hepdata.70880.v1/t35

    Absolute differential ttbar cross sections as a function of the pt of the leading additional b-jet b1 in the event...

  • Table 36

    Data from Page 53 of preprint, table B.8, top 4 lines of table,

    10.17182/hepdata.70880.v1/t36

    Normalized differential ttbar cross sections as a function of the pt of the leading additional b-jet b1 in the event...

  • Table 37

    Data from Page 53 of preprint, table B.8, lines 5-8 of table,

    10.17182/hepdata.70880.v1/t37

    Absolute differential ttbar cross sections as a function of |eta| of the leading additional b-jet b1 in the event (not...

  • Table 38

    Data from Page 53 of preprint, table B.8, lines 5-8 of table,

    10.17182/hepdata.70880.v1/t38

    Normalized differential ttbar cross sections as a function of |eta| of the leading additional b-jet b1 in the event (not...

  • Table 39

    Data from Page 53 of preprint, table B.8, lines 9-11 lines of table,

    10.17182/hepdata.70880.v1/t39

    Absolute differential ttbar cross sections as a function of the pt of the subleading additional b-jet b2 in the event...

  • Table 40

    Data from Page 53 of preprint, table B.8, lines 9-11 of table,

    10.17182/hepdata.70880.v1/t40

    Normalized differential ttbar cross sections as a function of the pt of the subleading additional b-jet b2 in the event...

  • Table 41

    Data from Page 53 of preprint, table B.8, lines 12-14 of table,

    10.17182/hepdata.70880.v1/t41

    Absolute differential ttbar cross sections as a function of |eta| of the leading additional b-jet b2 in the event (not...

  • Table 42

    Data from Page 53 of preprint, table B.8, lines 12-14 of table,

    10.17182/hepdata.70880.v1/t42

    Normalized differential ttbar cross sections as a function of |eta| of the leading additional b-jet b2 in the event (not...

  • Table 43

    Data from Page 54 of preprint, table B.9, top 4 lines of table,

    10.17182/hepdata.70880.v1/t43

    Absolute differential ttbar cross sections as a function of the invariant mass of the two leading additional b-jets in the...

  • Table 44

    Data from Page 54 of preprint, table B.9, top 4 lines of table,

    10.17182/hepdata.70880.v1/t44

    Normalized differential ttbar cross sections as a function of the invariant mass of the two leading additional b-jets in the...

  • Table 45

    Data from Page 54 of preprint, table B.9, lines 5 to 7 of table,

    10.17182/hepdata.70880.v1/t45

    Absolute differential ttbar cross sections as a function of the angle DeltaR between the two leading additional b-jets in the...

  • Table 46

    Data from Page 54 of preprint, table B.9, lines 5 to 7 of table,

    10.17182/hepdata.70880.v1/t46

    Normalized differential ttbar cross sections as a function of the angle DeltaR between the two leading additional b-jets in the...

  • Table 47

    Data from Page 55 of preprint, table B.10, top 4 lines of table,

    10.17182/hepdata.70880.v1/t47

    Absolute differential ttbar cross sections as a function of the pt of the leading additional b-jet b1 in the event...

  • Table 48

    Data from Page 55 of preprint, table B.10, top 4 lines of table,

    10.17182/hepdata.70880.v1/t48

    Normalized differential ttbar cross sections as a function of the pt of the leading additional b-jet b1 in the event...

  • Table 49

    Data from Page 55 of preprint, table B.10, lines 5-8 of table,

    10.17182/hepdata.70880.v1/t49

    Absolute differential ttbar cross sections as a function of |eta| of the leading additional b-jet b1 in the event (not...

  • Table 50

    Data from Page 55 of preprint, table B.10, lines 5-8 of table,

    10.17182/hepdata.70880.v1/t50

    Normalized differential ttbar cross sections as a function of |eta| of the leading additional b-jet b1 in the event (not...

  • Table 51

    Data from Page 55 of preprint, table B.10, lines 9-11 lines of table,

    10.17182/hepdata.70880.v1/t51

    Absolute differential ttbar cross sections as a function of the pt of the subleading additional b-jet b2 in the event...

  • Table 52

    Data from Page 55 of preprint, table B.10, lines 9-11 of table,

    10.17182/hepdata.70880.v1/t52

    Normalized differential ttbar cross sections as a function of the pt of the subleading additional b-jet b2 in the event...

  • Table 53

    Data from Page 55 of preprint, table B.10, lines 12-14 of table,

    10.17182/hepdata.70880.v1/t53

    Absolute differential ttbar cross sections as a function of |eta| of the leading additional b-jet b2 in the event (not...

  • Table 54

    Data from Page 55 of preprint, table B.10, lines 12-14 of table,

    10.17182/hepdata.70880.v1/t54

    Normalized differential ttbar cross sections as a function of |eta| of the leading additional b-jet b2 in the event (not...

  • Table 55

    Data from Page 56 of preprint, table B.11, top 4 lines of table,

    10.17182/hepdata.70880.v1/t55

    Absolute differential ttbar cross sections as a function of the invariant mass of the two leading additional b-jets in the...

  • Table 56

    Data from Page 56 of preprint, table B.11, top 4 lines of table,

    10.17182/hepdata.70880.v1/t56

    Normalized differential ttbar cross sections as a function of the invariant mass of the two leading additional b-jets in the...

  • Table 57

    Data from Page 56 of preprint, table B.11, lines 5 to 7 of table,

    10.17182/hepdata.70880.v1/t57

    Absolute differential ttbar cross sections as a function of the angle DeltaR between the two leading additional b-jets in the...

  • Table 58

    Data from Page 56 of preprint, table B.11, lines 5 to 7 of table,

    10.17182/hepdata.70880.v1/t58

    Normalized differential ttbar cross sections as a function of the angle DeltaR between the two leading additional b-jets in the...

  • Table 59

    Data from Additional Table, Figures 19 and 20 of preprint

    10.17182/hepdata.70880.v1/t59

    Gap fraction $f(p_T^{\rm jet})$ as function of leading additional jet transverse momentum $p_T^{\rm jet}$.

  • Table 60

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t60

    Gap fraction $f(p_T^{\rm jet})$ as function of leading additional jet transverse momentum $p_T^{\rm jet}$ in the region $|\eta|<0.8$.

  • Table 61

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t61

    Gap fraction $f(p_T^{\rm jet})$ as function of leading additional jet transverse momentum $p_T^{\rm jet}$ in the region $0.8<|\eta|<1.5$.

  • Table 62

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t62

    Gap fraction $f(p_T^{\rm jet})$ as function of leading additional jet transverse momentum $p_T^{\rm jet}$ in the region $1.5<|\eta|<2.4$.

  • Table 63

    Data from Additional Table, Figures 19 and 20 of preprint

    10.17182/hepdata.70880.v1/t63

    Gap fraction $f(p_T^{\rm jet_2})$ as function of subleading additional jet transverse momentum $p_T^{\rm jet_2}$.

  • Table 64

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t64

    Gap fraction $f(p_T^{\rm jet_2})$ as function of subleading additional jet transverse momentum $p_T^{\rm jet_2}$ in the region $|\eta|<0.8$.

  • Table 65

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t65

    Gap fraction $f(p_T^{\rm jet_2})$ as function of subleading additional jet transverse momentum $p_T^{\rm jet_2}$ in the region $0.8<|\eta|<1.5$.

  • Table 66

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t66

    Gap fraction $f(p_T^{\rm jet_2})$ as function of subleading additional jet transverse momentum $p_T^{\rm jet_2}$ in the region $1.5<|\eta|<2.4$.

  • Table 67

    Data from Additional Table, Figures 19 and 20 of preprint

    10.17182/hepdata.70880.v1/t67

    Gap fraction $f(H_T)$ as function of $H_T$.

  • Table 68

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t68

    Gap fraction $f(H_T)$ as function of $H_T$ in the region $|\eta|<0.8$.

  • Table 69

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t69

    Gap fraction $f(H_T)$ as function of $H_T$ in the region $0.8<|\eta|<1.5$.

  • Table 70

    Data from Additional Table, Figure 21 of preprint

    10.17182/hepdata.70880.v1/t70

    Gap fraction $f(H_T)$ as function of $H_T$ in the region $1.5<|\eta|<2.4$.

  • Table 71

    Data from Additional table (see also table B.1)

    10.17182/hepdata.70880.v1/t71

    Statistical covariance matrix for the absolute differential cross-section as a function of the number of jets with pt>30 GeV (see...

  • Table 72

    Data from Additional table (see also table B.1)

    10.17182/hepdata.70880.v1/t72

    Statistical covariance matrix for the normalized differential cross-section as a function of the number of jets with pt>30 GeV.

  • Table 73

    Data from Additional table (see also table B.1)

    10.17182/hepdata.70880.v1/t73

    Statistical covariance matrix for the absolute differential cross-section as a function of the number of jets with pt>60 GeV (see...

  • Table 74

    Data from Additional table (see also table B.1)

    10.17182/hepdata.70880.v1/t74

    Statistical covariance matrix for the normalized differential cross-section as a function of the number of jets with pt>60 GeV.

  • Table 75

    Data from Additional table (see also table B.1)

    10.17182/hepdata.70880.v1/t75

    Statistical covariance matrix for the absolute differential cross-section as a function of the number of jets with pt>100 GeV (see...

  • Table 76

    Data from Additional table (see also table B.1)

    10.17182/hepdata.70880.v1/t76

    Statistical covariance matrix for the normalized differential cross-section as a function of the number of jets with pt>100 GeV.

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