Published June 10, 2016
| Version Published + Submitted
Journal Article
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Inclusive and differential measurements of the tt charge asymmetry in pp collisions at √s = 8 TeV
Abstract
The tt charge asymmetry is measured in proton–proton collisions at a centre-of-mass energy of 8 TeV8 TeV. The data, collected with the CMS experiment at the LHC, correspond to an integrated luminosity of 19.7 fb^(−1). Selected events contain an electron or a muon and four or more jets, where at least one jet is identified as originating from b-quark hadronization. The inclusive charge asymmetry is found to be 0.0010±0.0068 (stat)±0.0037 (syst)0.0010±0.0068 (stat)±0.0037 (syst). In addition, differential charge asymmetries as a function of rapidity, transverse momentum, and invariant mass of the tt system are studied. For the first time at the LHC, the measurements are also performed in a reduced fiducial phase space of top quark pair production, with an integrated result of −0.0035±0.0072 (stat)±0.0031 (syst)−0.0035±0.0072 (stat)±0.0031 (syst). All measurements are consistent within two standard deviations with zero asymmetry as well as with the predictions of the standard model.
Additional Information
©2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. Received 11 July 2015, Revised 23 February 2016, Accepted 21 March 2016, Available online 29 March 2016. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Editor: M. Doser Funded by SCOAP3. We thank Werner Bernreuther, Zong-Guo Si, Johann Kühn, Ger-man Rodrigo, Emidio Gabrielli, Antonio Racioppi, and Martti Raidal for kindly providing theoretical predictions for the differential dis-tributions that are measured in this letter. We congratulate our colleagues in the CERN accelerator depart-ments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS in-stitutes 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 construc-tion and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFW and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); MoER, ERC IUT and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS and RFBR (Russia); MESTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET (Eu-ropean Union); the Leventis Foundation; the A.P. Sloan Founda-tion; the Alexander von Humboldt Foundation; the Belgian Fed-eral 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 Compagnia di San Paolo (Torino); the Consorzio per la Fisica (Trieste); 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.Attached Files
Published - 1-s2.0-S0370269316300314-main.pdf
Submitted - 1207.0065v2.pdf
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Additional details
Identifiers
- Eprint ID
- 68699
- Resolver ID
- CaltechAUTHORS:20160628-071348438
Related works
- Describes
- https://arxiv.org/abs/1207.0065 (URL)
Funding
- SCOAP3
- Bundesministerium für Wissenschaft, Forschung und Wirtschaft (BMWFW)
- Austrian Science Fund (FWF)
- Fonds de la Recherche Scientifique (FNRS)
- Fonds Wetenschappelijk Onderzoek - Vlaanderen (FWO)
- 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 Sao Paulo (FAPESP)
- Bulgarian Ministry of Education and Science (MES)
- CERN
- Chinese Academy of Sciences
- Ministry of Science and Technology (China)
- National Natural Science Foundation of China
- COLCIENCIAS (Colombia)
- Croatian Ministry of Science, Education and Sport
- Croatian Science Foundation
- Research Promotion Foundation, Cyprus
- Ministry of Education and Research (Estonia)
- Estonian Research Council via IUT
- European Regional Development Fund, Estonia
- Academy of Finland
- Ministry of Education and Culture (Finland)
- Helsinki Institute of Physics
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA) France
- Centre National de la Recherche Scientifique (CNRS)
- Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
- Bundesministerium für Bildung und Forschung (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Hermann von Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF) (Germany)
- General Secretariat for Research and Technology (GSRT)
- Hungarian National Scientific Research Fund (OTKA)
- National Innovation Office (Hungary)
- Department of Atomic Energy (India)
- Department of Science and Technology (DST) (India)
- Institute for Studies in Theoretical Physics and Mathematics, Iran
- Science Foundation, Ireland
- Istituto Nazionale di Fisica Nucleare (INFN)
- Ministry of Science, ICT and Future Planning (Korea)
- National Research Foundation of Korea
- Lithuanian Academy of Sciences
- Ministry of Education (Malaysia)
- Universiti Malaya (Malaya University, Malaysia)
- CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico)
- Ministry of Business, Innovation and Employment, New Zealand
- Pakistan Atomic Energy Commission
- Ministry of Science and Higher Education (Poland)
- Fundação para a Ciência e a Tecnologia (FCT)
- Joint Institute for Nuclear Research (JINR)
- 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
- Ministry of Education, Science and Technological Development of Serbia
- Secretaría de Estado de Investigación, Desarrollo e Innovación and Programa Consolider- Ingenio 2010
- ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, and SER
- Ministry of Science and Technology (Taipei)
- Thailand Center of Excellence in Physics
- Institute for the Promotion of Teaching Science and Technology of Thailand
- Special Task Force for Activating Research (Thailand)
- National Science and Technology Development Agency of Thailand
- Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK)
- Türkiye Atom Enerjisi Kurumu (TAEK)
- National Academy of Sciences of Ukraine and State Fund for Fundamental Researches, Ukraine
- Science and Technology Facilities Council (STFC)
- Department of Energy (DOE)
- NSF
- Marie-Curie program
- European Research Council (ERC)
- EPLANET
- Leventis Foundation
- Alfred P. Sloan Foundation
- Alexander von Humboldt Foundation
- Belgian Federal Science Policy Office (BELSPO)
- Fonds pour la Formation à la Recherche dans l'índustrie et dans l'Ágriculture (FRIA-Belgium)
- Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)
- Ministry of Education, Youth and Sports (MEYS) of the Czech Republic
- Council of Science and Industrial Research, India
- HOMING PLUS programme of Foundation for Polish Science
- European Union Regional Development Fund
- Compagnia di San Paolo (Torino)
- Consorzio per la Fisica (Trieste)
- Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)
- 20108T4XTM
- Thalis and Aristeia programmes cofinanced by EU-ESF
- Greek NSRF
- Qatar National Research Fund National Priorities Research Program
- Rachadapisek Sompot Fund for Postdoctoral Fellowship Chulalongkorn University (Thailand)
- Welch Foundation
Dates
- Created
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2016-06-29Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field