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Abstract:

The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and chargedparticle multiplicity are measured for events with at least one charged particle in the kinematic range |η| < 2.5 and p T > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity at η = 0 is measured to be 1.333 ± 0.003(stat.) ± 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict. © CERN, for the benefit of the ATLAS Collaboration.

Registro:

Documento: Artículo
Título:Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC
Autor:Multitudinario:3222
Filiación:University at Albany, 1400 Washington Ave, Albany, NY 12222, United States
University of Alberta, Department of Physics, Centre for Particle Physics, Edmonton, AB T6G 2G7, Canada
Ankara University, Faculty of Sciences, Department of Physics, Tandogan, Ankara, TR 061000, Turkey
LAPP, Université de Savoie, CNRS/IN2P3, Annecy-le-Vieux, France
Argonne National Laboratory, High Energy Physics Division, 9700 S. Cass Avenue, Argonne, IL 60439, United States
University of Arizona, Department of Physics, Tucson, AZ 85721, United States
The University of Texas at Arlington, Department of Physics, P.O. Box 19059, Arlington, TX 76019, United States
University of Athens, Nuclear and Particle Physics, Department of Physics, Panepistimiopouli, Zografou, Athens, GR 15771, Greece
National Technical University of Athens, Physics Department, 9-Iroon Polytechniou, Zografou, GR 15780, Greece
Institute of Physics, Azerbaijan Academy of Sciences, H. Javid Avenue 33, Baku, AZ 143, Azerbaijan
Institut de Física d'Altes Energies, IFAE, Edifici Cn, Universitat Autònoma de Barcelona, Bellaterra (Barcelona), ES-08193, Spain
University of Belgrade, Institute of Physics, P.O. Box 57, Belgrade, 11001, Serbia
University of Bergen, Department for Physics and Technology, Allegaten 55, Bergen, NO-5007, Norway
Lawrence Berkeley National Laboratory and University of California, Physics Division, MS50B-6227, 1 Cyclotron Road, Berkeley, CA 94720, United States
Humboldt University, Institute of Physics, Berlin, Newtonstr. 15, Berlin, D-12489, Germany
University of Bern, Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics, Sidlerstrasse 5, Bern, CH-3012, Switzerland
University of Birmingham, School of Physics and Astronomy, Edgbaston, Birmingham, B15 2TT, United Kingdom
Bogazici University, Faculty of Sciences, Department of Physics, Bebek-Istanbul, TR-80815, Turkey
INFN Sezione di Bologna, viale C. Berti Pichat, 6/2, Bologna, IT-40127, Italy
University of Bonn, Physikalisches Institut, Nussallee 12, Bonn, D-53115, Germany
Boston University, Department of Physics, 590 Commonwealth Avenue, Boston, MA 02215, United States
Brandeis University, Department of Physics, MS057, 415 South Street, Waltham, MA 02454, United States
Universidade Federal do Rio De Janeiro, COPPE/EE/IF, Caixa Postal 68528, Ilha do Fundao, Rio de Janeiro, BR-21945-970, Brazil
Brookhaven National Laboratory, Physics Department, Bldg. 510A, Upton, NY 11973, United States
National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Str. Atomistilor 407, P.O. Box MG-6R-077125, Romania
Universidad de Buenos Aires, FCEyN, Dto. Fisica, Pab I - C. Universitaria, Buenos Aires, 1428, Argentina
University of Cambridge, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom
Carleton University, Department of Physics, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada
CERN, Geneva, CH-1211 23, Switzerland
University of Chicago, Enrico Fermi Institute, 5640 S. Ellis Avenue, Chicago, IL 60637, United States
Pontificia Universidad Católica de Chile, Facultad de Fisica, Departamento de Fisica, Avda. Vicuna Mackenna 4860, San Joaquin, Santiago, Chile
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Laboratoire de Physique Corpusculaire, Clermont Université, Université Blaise Pascal, CNRS/IN2P3, Aubiere Cedex, FR-63177, France
Columbia University, Nevis Laboratory, 136 So. Broadway, Irvington, NY 10533, United States
University of Copenhagen, Niels Bohr Institute, Blegdamsvej 17, Kobenhavn, DK-2100 0, Denmark
INFN Gruppo Collegato di Cosenza, Dipartimento di Fisica, Arcavacata di Rende, IT-87036, Italy
Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology (FPACS, AGH-UST), al. Mickiewicza 30, Cracow, PL-30059, Poland
The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, Krakow, PL-31342, Poland
Southern Methodist University, Physics Department, 106 Fondren Science Building, Dallas, TX 75275-0175, United States
University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, United States
DESY, Notkestr. 85, D-22603 Hamburg and Platanenallee 6, Zeuthen, D-15738, Germany
TU Dortmund, Experimentelle Physik IV, Dortmund, D-44221, Germany
Technical University Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, Dresden, D-01069, Germany
Duke University, Department of Physics, Durham, NC 27708, United States
University of Edinburgh, School of Physics and Astronomy, James Clerk Maxwell Building, The Kings Buildings, Mayfield Road, Edinburgh, EH9 3JZ, United Kingdom
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Justus-Liebig-Universität Giessen, II Physikalisches Institut, Heinrich-Buff Ring 16, Giessen, D-35392, Germany
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Georg-August-Universität, II. Physikalisches Institut, Friedrich-Hund Platz 1, Göttingen, D-37077, Germany
Laboratoire de Physique Subatomique et de Cosmologie, CNRS/IN2P3, Université Joseph Fourier, INPG, 53 avenue des Martyrs, Grenoble Cedex, FR-38026, France
Hampton University, Department of Physics, Hampton, VA 23668, United States
Harvard University, Laboratory for Particle Physics and Cosmology, 18 Hammond Street, Cambridge, MA 02138, United States
Ruprecht-Karls-Universität Heidelberg: Kirchhoff-Institut für Physik, Im Neuenheimer Feld 227, Heidelberg, D-69120, Germany
Hiroshima University, Faculty of Science, 1-3-1 Kagamiyama, Higashihiroshima-shi, JP - Hiroshima, 739-8526, Japan
Hiroshima Institute of Technology, Faculty of Applied Information Science, 2-1-1 Miyake Saeki-ku, Hiroshima-shi, JP - Hiroshima, 731-5193, Japan
Indiana University, Department of Physics, Swain Hall West 117, Bloomington, IN 47405-7105, United States
Institut für Astro- und Teilchenphysik, Technikerstrasse 25, Innsbruck, A-6020, Austria
University of Iowa, 203 Van Allen Hall, Iowa City, IA 52242-1479, United States
Iowa State University, Department of Physics and Astronomy, Ames High Energy Physics Group, Ames, IA 50011-3160, United States
Joint Institute for Nuclear Research, JINR Dubna, Moscow Region, RU-141 980, Russian Federation
KEK, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba-shi, Ibaraki-ken, 305-0801, Japan
Kobe University, Graduate School of Science, 1-1 Rokkodai-cho, Nada-ku, JP - Kobe, 657-8501, Japan
Kyoto University, Faculty of Science, Oiwake-cho, Kitashirakawa, Sakyou-ku, Kyoto-shi, JP - Kyoto, 606-8502, Japan
Kyoto University of Education, 1 Fukakusa, Fujimori, fushimi-ku, Kyoto-shi, JP - Kyoto, 612-8522, Japan
Universidad Nacional de La Plata, FCE, Departamento de Física, IFLP (CONICET-UNLP), C.C. 67, La Plata, 1900, Argentina
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University of Liverpool, Oliver Lodge Laboratory, P.O. Box 147, Oxford Street, Liverpool, L69 3BX, United Kingdom
Jožef Stefan Institute and University of Ljubljana, Department of Physics, Ljubljana, SI-1000, Slovenia
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Laboratoire de Physique Nucléaire et de Hautes Energies, Université Pierre et Marie Curie (Paris 6), Université Denis Diderot (Paris-7), CNRS/IN2P3, Tour 33, 4 place Jussieu, Paris Cedex 05, FR-75252, France
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CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
University of Massachusetts, Department of Physics, 710 North Pleasant Street, Amherst, MA 01003, United States
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National Scientific and Educational Centre for Particle, High Energy Physics, NC PHEP BSU, M. Bogdanovich St. 153, Minsk, 220040, Belarus
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University of Montreal, Group of Particle Physics, C.P. 6128, Succursale Centre-Ville, Montreal, QC H3C 3J7, Canada
P.N. Lebedev Institute of Physics, Academy of Sciences, Leninsky pr. 53, Moscow, RU-117 924, Russian Federation
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Moscow Engineering and Physics Institute (MEPhI), Kashirskoe Shosse 31, Moscow, RU-115409, Russian Federation
Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics (MSU SINP), 1(2), Leninskie gory, GSP-1, Moscow, 119991, Russian Federation
Ludwig-Maximilians-Universität München, Fakultät für Physik, Am Coulombwall 1, Garching, D-85748, Germany
Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, Föhringer Ring 6, München, 80805, Germany
Nagasaki Institute of Applied Science, 536 Aba-machi, JP - Nagasaki, 851-0193, Japan
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University of New Mexico, Department of Physics and Astronomy, MSC07 4220, Albuquerque, NM 87131, United States
Radboud University Nijmegen/NIKHEF, Department of Experimental High Energy Physics, Heyendaalseweg 135, Nijmegen, NL-6525 AJ, Netherlands
Nikhef National Institute for Subatomic Physics, University of Amsterdam, Science Park 105, Amsterdam, 1098 XG, Netherlands
Budker Institute of Nuclear Physics (BINP), RU - Novosibirsk, 630 090, Russian Federation
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LAL, Univ. Paris-Sud, IN2P3/CNRS, Orsay, France
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University of Pennsylvania, Department of Physics, High Energy Physics Group, 209 S. 33rd Street, Philadelphia, PA 19104, United States
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Czech Technical University in Prague, Zikova 4, Praha 6, CZ-166 35, Czech Republic
State Research Center Institute for High Energy Physics, Pobeda street 1, Protvino, Moscow Region, 142281, Russian Federation
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Turkish Atomic Energy Authority, Lodumlu, Ankara, 06530, Turkey
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University of Science and Technology of China (USTC), Department of Modern Physics, Hefei, CN - Anhui, 230026, China
Nanjing University, Department of Physics, 22 Hankou Road, Nanjing, 210093, China
Shandong University, High Energy Physics Group, Jinan, CN - Shandong, 250100, China
Università della Calabria, Dipartimento di Fisica, Arcavacata di Rende, IT-87036, Italy
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Università di Pisa, Dipartimento di Fisica E. Fermi, Largo B. Pontecorvo 3, Pisa, IT-56127, Italy
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Università La Sapienza, Dipartimento di Fisica, Piazzale A. Moro 2, Roma, IT-00185, Italy
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Institute of Experimental Physics of the Slovak Academy of Sciences, Dept. of Subnuclear Physics, Watsonova 47, Kosice, SK-04353, Slovakia
The Oskar Klein Centre, AlbaNova, Stockholm, SE-106 91, Sweden
York University, Department of Physics and Astronomy, 4700 Keele St., Toronto, ON M3J 1P3, Canada
ICTP, Strada Costiera 11, Trieste, IT-34014, Italy
Università di Udine, Dipartimento di Fisica, via delle Scienze 208, Udine, IT-33100, Italy
FermiLab, United States
CPPM, Marseille, France
TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
Faculty of Physics and Applied Computer Science of the AGH-University of Science and Technology (FPACS, AGH-UST), al. Mickiewicza 30, Cracow, PL-30059, Poland
Università di Napoli Parthenope, via A. Acton 38, Napoli, IT-80133, Italy
Institute of Particle Physics (IPP), Canada
Louisiana Tech University, 305 Wisteria Street, P.O. Box 3175, Ruston, LA 71272, United States
Department of Physics, California State University, 2345 E. San Ramon Avenue, Fresno, CA 93740-8031, United States
Istituto Universitario di Studi Superiori IUSS, V. le Lungo Ticino Sforza 56, Pavia, 27100, Italy
California Institute of Technology, Physics Department, Pasadena, CA 91125, United States
University of Montreal, Canada
Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, Hamburg, 22761, Germany
Chonnam National University, Chonnam, 500-757, South Korea
Petersburg Nuclear Physics Institute, Gatchina, RU-188 300, Russian Federation
School of Physics and Engineering, Sun Yat-sen University, Taiwan
School of Physics, Shandong University, Jinan, China
Rutherford Appleton Laboratory, Science and Technology Facilities Council, Harwell Science and Innovation Campus, Didcot, OX11, United Kingdom
School of Physics, Shandong University, Jinan, China
Rutherford Appleton Laboratory, Science and Technology Facilities Council, Harwell Science and Innovation Campus, Didcot, OX11 0QX, United Kingdom
University of South Carolina, Dept. of Physics and Astronomy, 700 S. Main St, Columbia, SC 29208, United States
KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary
Institute of Physics, Jagiellonian University, Cracow, Poland
University of Rochester, Rochester, NY 14627, United States
Naruto University of Education, Takashima, JP - Tokushima, 772, Japan
Dept. of Physics, Nanjing University, China
Tbilisi State University, HEP Institute, University St. 9, Tbilisi, GE-380086, Georgia
Palabras clave:900 GeV; ATLAS; Charged-particle; LHC; Minimum bias; Multiplicities
Año:2010
Volumen:688
Número:1
Página de inicio:21
Página de fin:42
DOI: http://dx.doi.org/10.1016/j.physletb.2010.03.064
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v688_n1_p21_Multitudinario

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Citas:

---------- APA ----------
(2010) . Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 688(1), 21-42.
http://dx.doi.org/10.1016/j.physletb.2010.03.064
---------- CHICAGO ----------
Multitudinario:3222. "Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 688, no. 1 (2010) : 21-42.
http://dx.doi.org/10.1016/j.physletb.2010.03.064
---------- MLA ----------
Multitudinario:3222. "Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 688, no. 1, 2010, pp. 21-42.
http://dx.doi.org/10.1016/j.physletb.2010.03.064
---------- VANCOUVER ----------
Multitudinario:3222. Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2010;688(1):21-42.
http://dx.doi.org/10.1016/j.physletb.2010.03.064