{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.75374.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1209721"}},{"@id":"https://doi.org/10.1016/j.physletb.2013.04.025","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"CMS Collaboration"},"creator":{"@type":"Organization","name":"CMS Collaboration"},"datePublished":"2016","description":"CERN-LHC.  Measurements of event shapes and azimuthal correlations are presented for events where a Z boson is produced in association with jets in proton-proton collisions. The data collected with the CMS detector at the CERN LHC at sqrt(s) = 7 TeV correspond to an integrated luminosity of 5.0 inverse femtobarns. The analysis provides a test of predictions from perturbative QCD for a process that represents a substantial background to many physics channels. Results are presented as a function of jet multiplicity, for inclusive Z boson production and for Z bosons with transverse momenta greater than 150 GeV, and compared to predictions from Monte Carlo event generators that include leading-order multiparton matrix-element (with up to four hard partons in the final state) and next-to-leading-order simulations of Z + 1-jet events. The experimental results are corrected for detector effects, and can be compared directly with other QCD models\n\nFor $Z/\\gamma^{*}$ plus jets events we select:\n- two same flavour opposite sign leptons with $p_{T} > 20$ GeV and $|\\eta| < 2.4$ and $71 < M_{\\ell\\ell} < 111 $ GeV \n- leptons are \"dressed\" with all photons in a cone of radius $\\Delta R = 0.1$\n- at least one jet, jet selection $p_{T} > 30$ GeV and $|\\eta| < 2.4$, we remove jets within a radius of $\\Delta R < 0.4$ with respect to the axes of each lepton\n- for the ratio plots a cut on Z rapidity |y|<1.4 is also applied\n\nThe event shape variable is defined as $\\tau_{\\perp}\\equiv 1-\\max_{\\vec{n}_{T}}\\frac{\\sum_{i}\\left|\\vec{p}_{\\perp,i}\\cdot \\vec{n}_{T} \\right|}{\\sum_{i}p_{\\perp,i}}$.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t1","@type":"Dataset","description":"Normalized DPhi(Z, j1) distributions for Njets >= 1.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t2","@type":"Dataset","description":"Normalized DPhi(Z, j1) distributions for Njets >= 2.","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t3","@type":"Dataset","description":"Normalized DPhi(Z, j1) distributions for Njets >= 3.","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t4","@type":"Dataset","description":"Normalized DPhi(Z, j2) distributions for Njets >= 3.","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t5","@type":"Dataset","description":"Normalized DPhi(Z, j3) distributions for Njets >= 3.","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t6","@type":"Dataset","description":"Normalized DPhi(j1, j2) distributions for Njets >= 3.","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t7","@type":"Dataset","description":"Normalized DPhi(j1, j3) distributions for Njets >= 3.","name":"Table 7"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t8","@type":"Dataset","description":"Normalized DPhi(j2, j3) distributions for Njets >= 3.","name":"Table 8"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t9","@type":"Dataset","description":"Normalized DPhi(Z, j1) distributions for Njets >= 1 and PT(Z) >= 150 GeV.","name":"Table 9"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t10","@type":"Dataset","description":"Normalized DPhi(Z, j1) distributions for Njets >= 2 and PT(Z) >= 150 GeV.","name":"Table 10"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t11","@type":"Dataset","description":"Normalized DPhi(Z, j1) distributions for Njets >= 3 and PT(Z) >= 150 GeV.","name":"Table 11"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t12","@type":"Dataset","description":"Normalized DPhi(Z, j2) distributions for Njets >= 3 and PT(Z) >= 150 GeV.","name":"Table 12"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t13","@type":"Dataset","description":"Normalized DPhi(Z, j3) distributions for Njets >= 3 and PT(Z) >= 150 GeV.","name":"Table 13"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t14","@type":"Dataset","description":"Normalized DPhi(j1, j2) distributions for Njets >= 3 and PT(Z) >= 150 GeV.","name":"Table 14"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t15","@type":"Dataset","description":"Normalized DPhi(j1, j3) distributions for Njets >= 3 and PT(Z) >= 150 GeV.","name":"Table 15"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t16","@type":"Dataset","description":"Normalized DPhi(j2, j3) distributions for Njets >= 3 and PT(Z) >= 150 GeV.","name":"Table 16"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t17","@type":"Dataset","description":"Normalized distributions in ln(tauT) for all PT(Z) and Njets >=1.","name":"Table 17"},{"@id":"https://doi.org/10.17182/hepdata.75374.v1/t18","@type":"Dataset","description":"Normalized distributions in ln(tauT) for PT(Z) > 150 GeV and Njets >=1.","name":"Table 18"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1209721?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/75374"}],"inLanguage":"en","name":"Event shapes and azimuthal correlations in Z + jets events in pp collisions at sqrt(s) =7 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1209721?version=1","version":1}