Measurement of the underlying event activity in inclusive Z boson production in proton-proton collisions at root s=13 TeV
Austrian Federal Ministry of Science, Research and Economy ; Belgian Fonds de la Recherche Scientifique ; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) ; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) ; Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) ; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) ; Bulgarian Ministry of Education and Science ; CERN ; Chinese Academy of Sciences, Ministry of Science and Technology ; Colombian Funding Agency (COLCIENCIAS) ; Croatian Ministry of Science, Education and Sport ; Research Promotion Foundation, Cyprus ; Secretariat for Higher Education, Science, Technology and Innovation, Ecuador ; Ministry of Education and Research, Estonian Research Council ; European Regional Development Fund, Estonia ; Academy of Finland ; Institut National de Physique Nucleaire et de Physique des Particules / CNRS ; Bundesministerium fur Bildung und Forschung ; General Secretariat for Research and Technology, Greece ; National Scientific Research Foundation, Hungary ; Department of Atomic Energy, India ; Institute for Studies in Theoretical Physics and Mathematics, Iran ; Science Foundation, Ireland ; Istituto Nazionale di Fisica Nucleare, Italy ; Ministry of Science, ICT and Future Planning, Republic of Korea ; Lithuanian Academy of Sciences ; Ministry of Education (Malaysia) ; Mexican Funding Agency BUAP ; Mexican Funding Agency CINVESTAV ; Mexican Funding Agency CONACYT ; Mexican Funding Agency LNS ; Mexican Funding Agency SEP ; Mexican Funding Agency UASLP-FAI ; Ministry of Business, Innovation and Employment, New Zealand ; Pakistan Atomic Energy Commission ; Ministry of Science and Higher Education, Poland ; Fundacao para a Ciencia e a Tecnologia, Portugal ; JINR, Dubna ; Ministry of Education and Science of the Russian Federation ; Federal Agency of Atomic Energy of the Russian Federation ; Russian Academy of Sciences ; Russian Foundation for Basic Research and the Russian Competitiveness Program of NRNU MEPhI ; Ministry of Education, Science and Technological Development of Serbia ; Secretaria de Estado de Investigacion, Desarrollo e Innovacion, Programa Consolider-Ingenio 2010, Plan de Ciencia, Tecnologia e Innovacion 2013-2017 del Principado de Asturias and Fondo Europeo de Desarrollo Regional, Spain ; Swiss Funding Agency ETH Board ; Swiss Funding Agency ETH Zurich ; Swiss Funding Agency PSI ; Swiss Funding Agency SNF ; Swiss Funding Agency UniZH ; Swiss Funding Agency Canton Zurich ; Swiss Funding Agency SER ; Ministry of Science and Technology, Taipei ; Thailand Center of Excellence in Physics ; Scientific and Technical Research Council of Turkey ; National Academy of Sciences of Ukraine ; State Fund for Fundamental Researches, Ukraine ; Science and Technology Facilities Council, U.K. ; US Department of Energy ; Marie-Curie program ; European Research Council ; Horizon 2020 Grant (European Union) ; Leventis Foundation ; A. P. Sloan Foundation ; Alexander von Humboldt Foundation ; Belgian Federal Science Policy Office ; Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium) ; Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium) ; Ministry of Education, Youth and Sports (MEYS) of the Czech Republic ; Council of Scientific and Industrial Research, India ; HOMING PLUS program of the Foundation for Polish Science ; European Union, Regional Development Fund ; Mobility Plus program of the Ministry of Science and Higher Education ; National Science Center (Poland) ; Qatar National Research Fund ; Programa Severo Ochoa del Principado de Asturias ; EU-ESF ; Greek NSRF ; Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University ; Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand) ; Welch Foundation ; Weston Havens Foundation (U.S.A.) ; Austrian Science Fund ; Fonds voor Wetenschappelijk Onderzoek ; National Natural Science Foundation of China ; Croatian Science Foundation ; Finnish Ministry of Education and Culture ; Helsinki Institute of Physics ; Commissariat a l'Energie Atomique et aux Energies Alternatives / CEA, France ; Deutsche Forschungsgemeinschaft ; Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany ; National Innovation Office, Hungary ; Department of Science and Technology, India ; National Research Foundation (NRF), Republic of Korea ; University of Malaya (Malaysia) ; National Science Centre, Poland ; Institute for the Promotion of Teaching Science and Technology of Thailand ; Special Task Force for Activating Research ; National Science and Technology Development Agency of Thailand ; Turkish Atomic Energy Authority ; US National Science Foundation ; Ministry of Education and Research, Estonian Research Council: IUT23-4 ; Ministry of Education and Research, Estonian Research Council: IUT23-6 ; Horizon 2020 Grant (European Union): 675440 ; National Science Center (Poland): Harmonia 2014/14/M/ST2/00428 ; National Science Center (Poland): Opus 2014/13/B/ST2/02543 ; National Science Center (Poland): 2014/15/B/ST2/03998 ; National Science Center (Poland): 2015/19/B/ST2/02861 ; National Science Center (Poland): Sonata-bis 2012/07/E/ST2/01406 ; Welch Foundation: C-1845 ; This paper presents a measurement of the underlying event activity in proton-proton collisions at a center-of-mass energy of 13TeV, performed using inclusive Z boson production events collected with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 2.1 fb(-1). The underlying event activity is quantified in terms of the charged particle multiplicity, as well as of the scalar sum of the charged particles' transverse momenta in different topological regions defined with respect to the Z boson direction. The distributions are unfolded to the stable particle level and compared with predictions from various Monte Carlo event generators, as well as with similar CDF and CMS measurements at center-of-mass energies of 1.96 and 7TeV respectively.