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Measurement of masses in the tt system by kinematic endpoints in pp collisions at √s =7 TeV

Chatrchyan, S. and Apresyan, A. and Bornheim, A. and Bunn, J. and Chen, Y. and Di Marco, E. and Duarte, J. and Kcira, D. and Ma, Y. and Mott, A. and Newman, H. B. and Rogan, C. and Spiropulu, M. and Timciuc, V. and Veverka, J. and Wilkinson, R. and Xie, S. and Yang, Y. and Zhu, R. Y. and Dias, F. A. and Dubinin, M. (2013) Measurement of masses in the tt system by kinematic endpoints in pp collisions at √s =7 TeV. European Physical Journal C, 73 (7). Art. No. 2494. ISSN 1434-6044. https://resolver.caltech.edu/CaltechAUTHORS:20130918-103852156

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Abstract

A simultaneous measurement of the top-quark, W-boson, and neutrino masses is reported for tt events selected in the dilepton final state from a data sample corresponding to an integrated luminosity of 5.0 fb^(−1) collected by the CMS experiment in pp collisions at s√=7 TeV . The analysis is based on endpoint determinations in kinematic distributions. When the neutrino and W-boson masses are constrained to their world-average values, a top-quark mass value of M_t=173.9±0.9 (stat.)^(+1.7)_(−2.1) (syst.) GeV is obtained. When such constraints are not used, the three particle masses are obtained in a simultaneous fit. In this unconstrained mode the study serves as a test of mass determination methods that may be used in beyond standard model physics scenarios where several masses in a decay chain may be unknown and undetected particles lead to underconstrained kinematics.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1140/epjc/s10052-013-2494-7DOIArticle
http://link.springer.com/article/10.1140/epjc/s10052-013-2494-7PublisherArticle
Additional Information:© 2013 CERN for the benefit of the CMS collaboration. Received: 21 April 2013. Revised: 18 June 2013. Published online: 16 July 2013. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. 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 and Research 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, Youth 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; the Research Promotion Foundation, Cyprus; the Ministry of Education and Research, Recurrent financing contract SF0690030s09 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 Office for Research and Technology, 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 Korean Ministry of Education, Science and Technology and the World Class University program of NRF, Republic of Korea; the Lithuanian Academy of Sciences; the Mexican Funding Agencies (CINVESTAV, CONACYT, SEP, and UASLP-FAI); the Ministry of Science and Innovation, 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 (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); 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 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 National Science Council, Taipei; the Thailand Center of Excellence in Physics, the Institute for the Promotion of Teaching Science and Technology of Thailand and the National Science and Technology Development Agency of Thailand; the Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authority; 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 Czech Republic; the Council of Science and Industrial Research, India; the Compagnia di San Paolo (Torino); and the HOMING PLUS programme of Foundation for Polish Science, cofinanced from European Union, Regional Development Fund.
Funders:
Funding AgencyGrant Number
Austrian Federal Ministry of Science and ResearchUNSPECIFIED
Austrian Science FundUNSPECIFIED
Belgian Fonds de la Recherche Scientifique and Fonds voor Wetenschappelijk OrderzoekUNSPECIFIED
CNPq (Brazil)UNSPECIFIED
CAPES (Brazil)UNSPECIFIED
FAPERJ (Brazil)UNSPECIFIED
FAPESP (Brazil)UNSPECIFIED
Bulgarian Ministry of Education, Youth and ScienceUNSPECIFIED
CERNUNSPECIFIED
Chinese Academy of SciencesUNSPECIFIED
Ministry of Science and Technology UNSPECIFIED
National Natural Science Foundation of ChinaUNSPECIFIED
COLCIENCIAS (Colombia)UNSPECIFIED
Croatian Ministry of Science, Education and Sport UNSPECIFIED
Research Promotion Foundation, Cyprus UNSPECIFIED
Ministry of Education and Research SF0690030s09
European Regional Development Fund, EstoniaUNSPECIFIED
Academy of FinlandUNSPECIFIED
Finish Ministry of Education and Culture and Helsinki Institute of PhysicsUNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules/CNRSUNSPECIFIED
Commissariat à l’Energie Atomique et aux Énergies Alternatives/CEA, FranceUNSPECIFIED
Bundesministerium für Bildung und ForschungUNSPECIFIED
Deutsche Forschungsgemeinschaft (Germany)UNSPECIFIED
Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany UNSPECIFIED
General Secretariat for Research and Technology, Greece UNSPECIFIED
National Scientific Research Foundation, and National Office for Research and Technology, HungaryUNSPECIFIED
Department of Atomic Energy and the Department of Science and Technology, IndiaUNSPECIFIED
Institute for Studies in Theoretical Physics and Mathematics, Iran UNSPECIFIED
Science Foundation, Ireland UNSPECIFIED
Istituto Nazionale di Fisica Nucleare, ItalyUNSPECIFIED
Korean Ministry of Education, Science and Technology and the World Class University Program of NRF (KOREA)UNSPECIFIED
Lithuanian Academy of Sciences UNSPECIFIED
CINVESTAV (Mexico)UNSPECIFIED
CONACyT (Mexico)UNSPECIFIED
SEP (Mexico)UNSPECIFIED
UASLP-FAI (Mexico)UNSPECIFIED
Ministry of Science and Innovation, New ZealandUNSPECIFIED
Pakistan Atomic Energy CommissionUNSPECIFIED
Ministry of Science and Higher Education and the National Science Centre, PolandUNSPECIFIED
Fundação para a Ciência e a Tecnologia, PortugalUNSPECIFIED
JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)UNSPECIFIED
Ministry of Education and Science of the Russian Federation UNSPECIFIED
Federal Agency of Atomic Energy of the Russian Federation UNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Ministry of Science and Technological Development of Serbia UNSPECIFIED
Secretaría de Estado de Investigación, Desarrollo e Innovación and Programa Consolider-Ingenio 2010, SpainUNSPECIFIED
ETH Board UNSPECIFIED
ETH Zurich UNSPECIFIED
PSIUNSPECIFIED
SNFUNSPECIFIED
UniZH UNSPECIFIED
Canton Zurich UNSPECIFIED
SERUNSPECIFIED
National Science Council, TaipeiUNSPECIFIED
Thailand center of Excellence in PhysicsUNSPECIFIED
Institute for the Promotion of Teaching Science and Technology of ThailandUNSPECIFIED
National Science and Technology Development Agency of ThailandUNSPECIFIED
Scientific and Technical Research Council of TurkeyUNSPECIFIED
Turkish Atomic Energy Authority UNSPECIFIED
Science and Technology Facilities Council, UK UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Marie-Curie programme and the European Research Council and EPLANET (European Union)UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Belgian Federal Science Policy OfficeUNSPECIFIED
Fonds pour la Formation à la Recherche dans l’índustrie et dans l’Ágriculture (FRIA-Belgium)UNSPECIFIED
Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)UNSPECIFIED
Ministry of Education, Youth and Sports (MEYS) of Czech RepublicUNSPECIFIED
Council of Science and Industrial Research, IndiaUNSPECIFIED
Compagnia di San Paolo (Torino)UNSPECIFIED
HOMING PLUS programme of Foundation for Polish Science UNSPECIFIED
European UnionUNSPECIFIED
Regional Development FundUNSPECIFIED
Issue or Number:7
Record Number:CaltechAUTHORS:20130918-103852156
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130918-103852156
Official Citation: Measurement of masses in the tt− system by kinematic endpoints in pp collisions at s√=7 TeV S. Chatrchyan, V. Khachatryan, A. M. Sirunyan… Article:2494
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41381
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:18 Sep 2013 19:57
Last Modified:03 Oct 2019 05:48

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