Published September 27, 2010
| Version Published
Journal Article
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Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC
Abstract
Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center-of-mass energies of 0.9, 2.36, and 7 TeV are presented, using data collected with the CMS detector over a broad range of pseudorapidity (η) and azimuthal angle (ø). Short-range correlations in Δη, which are studied in minimum bias events, are characterized using a simple "independent cluster" parametrization in order to quantify their strength (cluster size) and their extent in η (cluster decay width). Long-range azimuthal correlations are studied differentially as a function of charged particle multiplicity and particle transverse momentum using a 980 nb^(-1) data set at 7 TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particle pairs with intermediate p_T of 1-3 GeV/c, 2.0 < | Δη| < 4:8 and Δø ≈ 0. This is the first observation of such a long--range, near-side feature in two-particle correlation functions in pp or pp[overbar] collisions.
Additional Information
© 2010 CERN, for the benefit of the CMS Collaboration. Published for SISSA by Springer. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. Received: September 22, 2010; Accepted: September 23, 2010; Published: September 27, 2010. We thank the technical and administrative sta at CERN and other CMS institutes. This work was supported by the Austrian Federal Ministry of Science and Research; the Belgium Fonds de la Recherche Scientique, 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; the Research Promotion Foundation, Cyprus; the Estonian Academy of Sciences and NICPB; the Academy of Finland, Finnish Ministry of Education, and Helsinki Institute of Physics; the Institut National de Physique Nucleaire et de Physique des Particules / CNRS, and Commissariat a l'Energie Atomique, 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 Scientic Research Foundation, and National Oce for Research and Technology, Hungary; the Department of Atomic Energy, and 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, Korea; the Lithuanian Academy of Sciences; the Mexican Funding Agencies (CINVESTAV, CONACYT, SEP, and UASLP-FAI); the Pakistan Atomic Energy Commission; the State Commission for Scientic Research, Poland; the Fundação para a Cíencia e a Tecnologia, Portugal; JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); the Ministry of Science and Technologies of the Russian Federation, and Russian Ministry of Atomic Energy; the Ministry of Science and Technological Development of Serbia; the Ministerio de Ciencia e Innovacion, 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 Scientic 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 IEF program (European Union); the Leventis Foundation; the A. P. Sloan Foundation; the Alexander von Humboldt Foundation; and the Associazione per lo Sviluppo Scientico e Tecnologico del Piemonte (Italy).Attached Files
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Additional details
Identifiers
- Eprint ID
- 21068
- Resolver ID
- CaltechAUTHORS:20101130-132602008
Funding
- Austrian Federal Ministry of Science and Research
- Belgium Fonds de la Recherche Scientifique
- Fonds voor Wetenschappelijk Onderzoek
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) (Brazil)
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) (Brazil)
- Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Bulgarian Ministry of Education and Science
- European Organization for Nuclear Researc (CERN)
- Chinese Academy of Sciences
- Ministry of Science and Technology
- National Natural Science Foundation of China
- Colombian Funding Agency (COLCIENCIAS)
- Croatian Ministry of Science, Education and Sport
- Research Promotion Foundation (Cyprus)
- Estonian Academy of Sciences and NICPB
- Academy of Finland, Finnish Ministry of Education, and Helsinki Institute of Physics
- Institut National de Physique Nucleaire et de Physique des Particules (CNRS)
- Commissariat a l'Energie Atomique (France)
- Bundesministerium fur Bildung und Forschung (Germany)
- Deutsche Forschungsgemeinschaft (DFG) (Germany)
- Helmholtz-Gemeinschaft Deutscher Forschungszentren (Germany)
- General Secretariat for Research and Technology (Greece)
- National Scientific Research Foundation, and National Office for Research and Technology (Hungary)
- Department of Atomic Energy, and Department of Science and Technology (India)
- Institute for Studies in Theoretical Physics and Mathematics (Iran)
- Science Foundation (Ireland)
- Istituto Nazionale di Fisica Nucleare (Italy)
- Korean Ministry of Education, Science and Technology
- World Class University program of NRF (Korea)
- Lithuanian Academy of Sciences
- Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV) (Mexico)
- Consejo Nacional de Ciencia y Tecnología (CONACyT) (Mexico)
- Secretaría de Educación Pública (SEP) (Mexico)
- Universidad Autónoma de San Luis Potosí (UASLP-FAI) (Mexico)
- Pakistan Atomic Energy Commission
- State Commission for Scientific Research (Poland)
- Fundacao para a Ciencia e a Tecnologia (Portugal)
- Joint Institute for Nuclear Research (JINR) (Armenia)
- Joint Institute for Nuclear Research (JINR) (Belarus)
- Joint Institute for Nuclear Research (JINR) (Georgia)
- Joint Institute for Nuclear Research (JINR) (Ukraine)
- Joint Institute for Nuclear Research (JINR) (Uzbekistan)
- Ministry of Science and Technologies of the Russian Federation
- Russian Ministry of Atomic Energy
- Ministry of Science and Technological Development of Serbia
- Ministerio de Ciencia e Innovacion, and Programa Consolider-Ingenio (Spain)
- ETH Board
- ETH Zurich
- PSI
- SNF
- Universität Zürich (UniZH)
- Canton Zurich
- SER
- National Science Council (Taipei)
- Scientific and Technical Research Council of Turkey
- Turkish Atomic Energy Authority
- Science and Technology Facilities Council (STFC)
- Department of Energy (DOE)
- NSF
- European Union
- Leventis Foundation
- A. P. Sloan Foundation
- Alexander von Humboldt Foundation
- Associazione per lo Sviluppo Scientifico e Tecnologico del Piemonte (Italy)
Dates
- Created
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2010-12-04Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field