Abstract
The algorithm developed by the CMS Collaboration to reconstruct and identify τ leptons produced in proton-proton collisions at s=7 and 8 TeV, via their decays to hadrons and a neutrino, has been significantly improved. The changes include a revised reconstruction of π0 candidates, and improvements in multivariate discriminants to separate τ leptons from jets and electrons. The algorithm is extended to reconstruct τ leptons in highly Lorentz-boosted pair production, and in the high-level trigger. The performance of the algorithm is studied using proton-proton collisions recorded during 2016 at s=13 TeV, corresponding to an integrated luminosity of 35.9 fb-1. The performance is evaluated in terms of the efficiency for a genuine τ lepton to pass the identification criteria and of the probabilities for jets, electrons, and muons to be misidentified as τ leptons. The results are found to be very close to those expected from Monte Carlo simulation.
| Original language | English |
|---|---|
| Article number | P10005 |
| Journal | Journal of Instrumentation |
| Volume | 13 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2 Oct 2018 |
Bibliographical note
Publisher Copyright:© 2018 CERN for the benefit of the CMS collaboration..
Funding
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 Research, Development and Innovation Fund, 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 Ministry of Education and Science of the Republic of Latvia; the Lithuanian Academy of Sciences; the Ministry of Education, and University of Malaya (Malaysia); the Ministry of Science of Montenegro; the Mexican Funding Agencies (BUAP, CINVESTAV, CONACYT, LNS, 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, the Russian Foundation for Basic Research, and the National Research Center “Kurchatov Institute”; the Ministry of Education, Science and Technological Development of Serbia; the Secretaría de Estado de Investigación, Desarrollo e Innovación, Programa Consolider-Ingenio 2010, Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016, Plan de Ciencia, Tecnología e Innovación 2013-2017 del Principado de Asturias, and Fondo Europeo de Desarrollo Regional, Spain; the Ministry of Science, Technology and Research, Sri Lanka; 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, U.K.; the US Department of Energy, and the US National Science Foundation. contracts Harmonia 2014/14/M/ST2/00428, Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, and 2015/19/B/ST2/02861, Sonata-bis 2012/07/E/ST2/01406; the National Priorities Research Program by Qatar National Research Fund; the Programa de Excelencia María de Maeztu, and the Pro-grama Severo Ochoa del Principado de Asturias; the Thalis and Aristeia programmes cofinanced by EU-ESF, and the Greek NSRF; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chu-lalongkorn University, and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); the Welch Foundation, contract C-1845; and the Weston Havens Foundation (U.S.A.). 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 Education, Science and Research and the Austrian Science Fund; the Belgian Fonds de la Recherche Scientifique, and Fonds voor Weten-schappelijk Onderzoek; the Brazilian Funding Agencies (CNPq, CAPES, FAPERJ, FAPERGS, 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 Secretariat for Higher Education, Science, Technology and Innovation, Ecuador; 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, Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract No. 675440 (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 F.R.S.-FNRS and FWO (Belgium) under the “Excellence of Science - EOS” -be.h project n. 30820817; the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Lendület (“Momentum”) Programme and the János Bolyai Research Scholarship of the Hungarian Academy of Sciences, the New National Excellence Program ÚNKP, the NKFIA research grants 123842, 123959, 124845, 124850 and 125105 (Hungary); the Council of Scientific and Industrial Research, India; the HOMING PLUS programme of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund, the Mobility Plus programme of the Ministry of Science and Higher Education, the National Science Center (Poland),
| Funders | Funder number |
|---|---|
| Not added | ST/I505580/1, ST/K003542/1, ST/L005603/1, ST/J004871/1, ST/N001273/1, ST/I003622/1, ST/J005479/1, ST/N000242/1 |
| Chulalongkorn Academic | |
| Desarrollo e Innovación | |
| EU-ESF | |
| Excellence of Science | 30820817 |
| Fonds voor Weten-schappelijk Onderzoek | |
| Helsinki Institute of Physics | |
| Institute for Studies in Theoretical Physics and Mathematics | |
| Mexican Funding Agencies | |
| Ministry of Science of Montenegro | |
| Ministry of Science, Technology and Research, Sri Lanka | |
| Pro-grama Severo Ochoa del Principado de Asturias | |
| Secretariat for Higher Education, Science, Technology and Innovation | |
| Secretaría de Estado de Investigación | |
| State Fund for Fundamental Researches | |
| National Science Foundation | |
| U.S. Department of Energy | |
| Alfred P. Sloan Foundation | |
| Welch Foundation | C-1845 |
| Alexander von Humboldt-Stiftung | |
| Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS) | |
| National Research Centre | |
| Qatar National Research Fund | |
| Ministry of Education and Science | |
| Direktion für Entwicklung und Zusammenarbeit | |
| Secretaría de Educación Pública | |
| Türkiye Atom Enerjisi Kurumu | |
| Weston Havens Foundation | |
| CERN | |
| Thailand Center of Excellence in Physics | |
| Institute for the Promotion of Teaching Science and Technology | |
| Kanton Zürich | |
| Science and Technology Facilities Council | ST/F007434/1, ST/M004775/1, GRIDPP |
| 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 | |
| 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 | |
| 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 | |
| National Research Foundation of Korea | |
| Joint Institute for Nuclear Research | |
| Magyar Tudományos Akadémia | |
| Instituto Nazionale di Fisica Nucleare | |
| A.G. Leventis Foundation | |
| National Science and Technology Development Agency | |
| Paul Scherrer Institut | |
| Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul | |
| Narodowe Centrum Nauki | |
| Universiti Malaya | |
| Türkiye Bilimsel ve Teknolojik Araştirma Kurumu | |
| Hrvatska Zaklada za Znanost | |
| Ministry of Education and Science of the Republic of Kazakhstan | |
| Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja | |
| Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro | |
| Ministry of Science and Technology, Taiwan | |
| National Academy of Sciences of Ukraine | |
| Centre National de la Recherche Scientifique | |
| Universidad Autónoma de San Luis Potosí | |
| Ministry of Education and Science | |
| Benemérita Universidad Autónoma de Puebla | |
| Universität Zürich | |
| Commissariat à l'Énergie Atomique et aux Énergies Alternatives | |
| Ministarstvo Znanosti, Obrazovanja i Sporta | |
| Horizon 2020 | 675440 |
| 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 | |
| Nemzeti Kutatási, Fejlesztési és Innovaciós Alap | 124845, 123842, 125105, 124850, 123959 |
| Federal Agency of Atomic Energy of the Russian Federation | |
| Sociedad Española de Reumatología | |
| Bundesministerium für Bildung, Wissenschaft und Forschung | |
| Board of the Swiss Federal Institutes of Technology | |
| Laboratorio Nacional de Supercómputo del Sureste de Mexico |
Keywords
- Large detector-systems performance
- Particle identification methods
- Performance of High Energy Physics Detectors