Abstract
New sets of parameters (“tunes”) for the underlying-event (UE) modelling of the pythia8, pythia6 and herwig++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS UE proton–proton ( (Formula presented.) ) data at (Formula presented.) and to UE proton–antiproton ( (Formula presented.) ) data from the CDF experiment at lower (Formula presented.) , are used to study the UE models and constrain their parameters, providing thereby improved predictions for proton–proton collisions at 13 (Formula presented.). In addition, it is investigated whether the values of the parameters obtained from fits to UE observables are consistent with the values determined from fitting observables sensitive to double-parton scattering processes. Finally, comparisons are presented of the UE tunes to “minimum bias” (MB) events, multijet, and Drell–Yan ( (Formula presented.) lepton-antilepton+jets) observables at 7 and 8 (Formula presented.) , as well as predictions for MB and UE observables at 13 (Formula presented.).
| Original language | English |
|---|---|
| Article number | 155 |
| Journal | European Physical Journal C |
| Volume | 76 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Mar 2016 |
Bibliographical note
Publisher Copyright:© 2016, CERN for the benefit of the CMS collaboration.
Funding
We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: the Austrian Federal Ministry of Science, Research and Economy and the Austrian Science Fund; the Belgian Fonds de la Recherche Scientifique, and Fonds voor Wetenschappelijk Onderzoek; the Brazilian Funding Agencies (CNPq, CAPES, FAPERJ, and FAPESP); the Bulgarian Ministry of Education and Science; CERN; the Chinese Academy of Sciences, Ministry of Science and Technology, and National Natural Science Foundation of China; the Colombian Funding Agency (COLCIENCIAS); the Croatian Ministry of Science, Education and Sport, and the Croatian Science Foundation; the Research Promotion Foundation, Cyprus; the Ministry of Education and Research, Estonian Research Council via IUT23-4 and IUT23-6 and European Regional Development Fund, Estonia; the Academy of Finland, Finnish Ministry of Education and Culture, and Helsinki Institute of Physics; the Institut National de Physique Nucléaire et de Physique des Particules/CNRS, and Commissariat à l’Énergie Atomique et aux Énergies Alternatives/CEA, France; the Bundesministerium für Bildung und Forschung, Deutsche Forschungsgemeinschaft, and Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany; the General Secretariat for Research and Technology, Greece; the National Scientific Research Foundation, and National Innovation Office, Hungary; the Department of Atomic Energy and the Department of Science and Technology, India; the Institute for Studies in Theoretical Physics and Mathematics, Iran; the Science Foundation, Ireland; the Istituto Nazionale di Fisica Nucleare, Italy; the Ministry of Science, ICT and Future Planning, and National Research Foundation (NRF), Republic of Korea; the Lithuanian Academy of Sciences; the Ministry of Education, and University of Malaya (Malaysia); the Mexican Funding Agencies (CINVESTAV, CONACYT, SEP, and UASLP-FAI); the Ministry of Business, Innovation and Employment, New Zealand; the Pakistan Atomic Energy Commission; the Ministry of Science and Higher Education and the National Science Centre, Poland; the Fundação para a Ciência e a Tecnologia, Portugal; JINR, Dubna; the Ministry of Education and Science of the Russian Federation, the Federal Agency of Atomic Energy of the Russian Federation, Russian Academy of Sciences, and the Russian Foundation for Basic Research; the Ministry of Education, Science and Technological Development of Serbia; the Secretaría de Estado de Investigación, Desarrollo e Innovación and Programa Consolider-Ingenio 2010, Spain; the Swiss Funding Agencies (ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and SER); the Ministry of Science and Technology, Taipei; the Thailand Center of Excellence in Physics, the Institute for the Promotion of Teaching Science and Technology of Thailand, Special Task Force for Activating Research and the National Science and Technology Development Agency of Thailand; the Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authority; the National Academy of Sciences of Ukraine, and State Fund for Fundamental Researches, Ukraine; the Science and Technology Facilities Council, UK; the US Department of Energy, and the US National Science Foundation. Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Council of Science and Industrial Research, India; the HOMING PLUS programme of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund; the OPUS programme of the National Science Center (Poland); the Compagnia di San Paolo (Torino); MIUR project 20108T4XTM (Italy); the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF; the National Priorities Research Program by Qatar National Research Fund; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University (Thailand); and the Welch Foundation, contract C-1845.
| Funders | Funder number |
|---|---|
| Austrian Federal Ministry of Science | |
| Desarrollo e Innovación and Programa Consolider-Ingenio 2010 | |
| EU-ESF | |
| Helsinki Institute of Physics | |
| Institute for Studies in Theoretical Physics and Mathematics | |
| Mexican Funding Agencies | |
| National Innovation Office | |
| National Scientific Research Foundation | |
| Republic of Korea | |
| Secretaría de Estado de Investigación | |
| State Fund for Fundamental Researches | |
| National Science Foundation | 1151640, 1506168, 1206044, 1314131, 1306951, 1506130, 1120138, 1211067, 1508869 |
| U.S. Department of Energy | |
| Alfred P. Sloan Foundation | |
| Welch Foundation | C-1845 |
| Alexander von Humboldt-Stiftung | |
| Compagnia di San Paolo | |
| Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS) | |
| Qatar National Research Fund | |
| Secretaría de Educación Pública | |
| Türkiye Atom Enerjisi Kurumu | |
| Seventh Framework Programme | 246806 |
| CERN | |
| Thailand Center of Excellence in Physics | |
| Institute for the Promotion of Teaching Science and Technology | |
| Kanton Zürich | |
| Science and Technology Facilities Council | ST/N000250/1, ST/K003542/1, ST/K001256/1, ST/J004871/1, GRIDPP, PP/E002803/1, ST/N001273/1, ST/H000925/2, ST/H000925/1, ST/J005479/1, ST/K001531/1, ST/I000305/1, PP/E000479/1, ST/M004775/1, ST/K001639/1, ST/L005603/1, ST/M002020/1, ST/I003622/1, ST/N000242/1 |
| European Commission | |
| European Research Council | |
| National Research Foundation | |
| Department of Science and Technology, Ministry of Science and Technology, India | |
| Council of Scientific and Industrial Research, India | |
| Department of Atomic Energy, Government of India | |
| Science Foundation Ireland | |
| Helmholtz-Gemeinschaft | |
| Deutsche Forschungsgemeinschaft | |
| Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung | 153664 |
| Fundação de Amparo à Pesquisa do Estado de São Paulo | |
| National Natural Science Foundation of China | |
| Research Promotion Foundation | |
| Ministerstvo Školství, Mládeže a Tělovýchovy | |
| Fundacja na rzecz Nauki Polskiej | |
| Fundação para a Ciência e a Tecnologia | |
| Russian Foundation for Basic Research | |
| Eesti Teadusagentuur | IUT23-6, IUT23-4 |
| Coordenação de Aperfeiçoamento de Pessoal de Nível Superior | |
| Academy of Finland | |
| Bundesministerium für Bildung und Forschung | |
| Chinese Academy of Sciences | |
| Austrian Science Fund | |
| Fonds De La Recherche Scientifique - FNRS | |
| Russian Academy of Sciences | |
| Ministry of Education | |
| Belgian Federal Science Policy Office | |
| Chulalongkorn University | |
| Eidgenössische Technische Hochschule Zürich | |
| Opetus- ja Kulttuuriministeriö | |
| Fonds Wetenschappelijk Onderzoek | |
| Agentschap voor Innovatie door Wetenschap en Technologie | |
| Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture | |
| Consejo Nacional de Ciencia y Tecnología | |
| Ministero dell’Istruzione, dell’Università e della Ricerca | 20108T4XTM |
| Ministry of Education and Science of the Russian Federation | |
| General Secretariat for Research and Technology | |
| Haridus- ja Teadusministeerium | |
| Ministry of Business, Innovation and Employment | |
| Conselho Nacional de Desenvolvimento Científico e Tecnológico | |
| Ministry of Science, ICT and Future Planning | |
| Ministry of Science and Technology | |
| Joint Institute for Nuclear Research | |
| Instituto Nazionale di Fisica Nucleare | |
| A.G. Leventis Foundation | |
| National Science and Technology Development Agency | |
| Paul Scherrer Institut | |
| Narodowe Centrum Nauki | |
| Universiti Malaya | |
| Türkiye Bilimsel ve Teknolojik Araştirma Kurumu | |
| Hrvatska Zaklada za Znanost | |
| Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja | |
| Ministerstwo Edukacji i Nauki | |
| Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro | |
| National Academy of Sciences of Ukraine | |
| Centre National de la Recherche Scientifique | |
| Universidad Autónoma de San Luis Potosí | |
| Ministry of Education and Science | |
| Universität Zürich | |
| Commissariat à l'Énergie Atomique et aux Énergies Alternatives | |
| Ministarstvo Znanosti, Obrazovanja i Sporta | |
| Lietuvos Mokslų Akademija | |
| European Regional Development Fund | |
| Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional | |
| Pakistan Atomic Energy Commission | |
| Institut National de Physique Nucléaire et de Physique des Particules | |
| Federal Agency of Atomic Energy of the Russian Federation | |
| Sociedad Española de Reumatología | |
| Board of the Swiss Federal Institutes of Technology |