{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.70880.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1397174"}},{"@id":"https://doi.org/10.1140/epjc/s10052-016-4105-x","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2016","description":"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.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t1","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 30GeV, along with...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t2","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 30GeV, along with...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t3","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 60GeV, along with...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t4","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 60GeV, along with...","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t5","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 100GeV, along with...","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t6","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the jet multiplicity for jets with pt > 100GeV, along with...","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t7","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the pt of the leading additional jet in the event (not...","name":"Table 7"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t8","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the pt of the leading additional jet in the event (not...","name":"Table 8"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t9","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the eta of the leading additional jet in the event (not...","name":"Table 9"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t10","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the eta of the leading additional jet in the event (not...","name":"Table 10"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t11","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the pt of the subleading additional jet in the event (not...","name":"Table 11"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t12","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the pt of the subleading additional jet in the event (not...","name":"Table 12"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t13","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of |eta| of the subleading additional jet in the event (not coming...","name":"Table 13"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t14","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of |eta| of the subleading additional jet in the event (not coming...","name":"Table 14"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t15","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the invariant mass of the two leading additional jets in the...","name":"Table 15"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t16","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the invariant mass of the two leading additional jets in the...","name":"Table 16"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t17","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the angle DeltaR between the two leading additional jets in the...","name":"Table 17"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t18","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the angle DeltaR between the two leading additional jets in the...","name":"Table 18"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t19","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the observable HT, along with their statistical and systematic uncertainties. The...","name":"Table 19"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t20","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the observable HT, along with their statistical and systematic uncertainties. The...","name":"Table 20"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t21","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the pt of the leading additional jet j1 in the event...","name":"Table 21"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t22","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of pt of the leading additional jet j1 in the event (not...","name":"Table 22"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t23","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of |eta| of the leading additional jet j1 in the event (not...","name":"Table 23"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t24","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of |eta| of the leading additional jet j1 in the event (not...","name":"Table 24"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t25","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the pt of the subleading additional jet j2 in the event...","name":"Table 25"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t26","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of pt of the subleading additional jet j2 in the event (not...","name":"Table 26"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t27","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of |eta| of the subleading additional jet j2 in the event (not...","name":"Table 27"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t28","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of |eta| of the subleading additional jet j2 in the event (not...","name":"Table 28"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t29","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the invariant mass of the two leading additional jets in the...","name":"Table 29"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t30","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the invariant mass of the two leading additional jets in the...","name":"Table 30"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t31","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the angle DeltaR between the two leading additional jets in the...","name":"Table 31"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t32","@type":"Dataset","description":"Normalized differential ttbar cross sections as a function of the angle DeltaR between the two leading additional jets in the...","name":"Table 32"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t33","@type":"Dataset","description":"Absolute differential ttbar cross sections as a function of the observable HT, along with their statistical and systematic uncertainties. 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62"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t63","@type":"Dataset","description":"Gap fraction $f(p_T^{\\rm jet_2})$ as function of subleading additional jet transverse momentum $p_T^{\\rm jet_2}$.","name":"Table 63"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t64","@type":"Dataset","description":"Gap fraction $f(p_T^{\\rm jet_2})$ as function of subleading additional jet transverse momentum $p_T^{\\rm jet_2}$ in the region $|\\eta|<0.8$.","name":"Table 64"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t65","@type":"Dataset","description":"Gap fraction $f(p_T^{\\rm jet_2})$ as function of subleading additional jet transverse momentum $p_T^{\\rm jet_2}$ in the region $0.8<|\\eta|<1.5$.","name":"Table 65"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t66","@type":"Dataset","description":"Gap fraction $f(p_T^{\\rm jet_2})$ as function of subleading additional jet transverse momentum $p_T^{\\rm jet_2}$ in the region $1.5<|\\eta|<2.4$.","name":"Table 66"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t67","@type":"Dataset","description":"Gap fraction $f(H_T)$ as function of $H_T$.","name":"Table 67"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t68","@type":"Dataset","description":"Gap fraction $f(H_T)$ as function of $H_T$ in the region $|\\eta|<0.8$.","name":"Table 68"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t69","@type":"Dataset","description":"Gap fraction $f(H_T)$ as function of $H_T$ in the region $0.8<|\\eta|<1.5$.","name":"Table 69"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t70","@type":"Dataset","description":"Gap fraction $f(H_T)$ as function of $H_T$ in the region $1.5<|\\eta|<2.4$.","name":"Table 70"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t71","@type":"Dataset","description":"Statistical covariance matrix for the absolute differential cross-section as a function of the number of jets with pt>30 GeV (see...","name":"Table 71"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t72","@type":"Dataset","description":"Statistical covariance matrix for the normalized differential cross-section as a function of the number of jets with pt>30 GeV.","name":"Table 72"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t73","@type":"Dataset","description":"Statistical covariance matrix for the absolute differential cross-section as a function of the number of jets with pt>60 GeV (see...","name":"Table 73"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t74","@type":"Dataset","description":"Statistical covariance matrix for the normalized differential cross-section as a function of the number of jets with pt>60 GeV.","name":"Table 74"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t75","@type":"Dataset","description":"Statistical covariance matrix for the absolute differential cross-section as a function of the number of jets with pt>100 GeV (see...","name":"Table 75"},{"@id":"https://doi.org/10.17182/hepdata.70880.v1/t76","@type":"Dataset","description":"Statistical covariance matrix for the normalized differential cross-section as a function of the number of jets with pt>100 GeV.","name":"Table 76"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1397174?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/70880"}],"inLanguage":"en","name":"Measurement of t-tbar production with additional jet activity, including b quark jets, in the dilepton channel using pp collisions at sqrt(s) = 8TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1397174?version=1","version":1}