https://doi.org/10.1140/epjc/s10052-012-2183-y
Regular Article - Experimental Physics
Production of K∗(892)0 and ϕ(1020) in pp collisions at
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CERN, 1211, Geneva 23, Switzerland
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Eberhard Karls Universität Tübingen, Tübingen, Germany
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Nikhef, National Institute for Subatomic Physics and Institute for Subatomic Physics of Utrecht University, Utrecht, Netherlands
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Dipartimento di Fisica dell’Università and Sezione INFN, Padova, Italy
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COMSATS Institute of Information Technology (CIIT), Islamabad, Pakistan
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Laboratoire de Physique Corpusculaire (LPC), Clermont Université, Université Blaise Pascal, CNRS–IN2P3, Clermont-Ferrand, France
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Yonsei University, Seoul, South Korea
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Yerevan Physics Institute, Yerevan, Armenia
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Scientific Research Technological Institute of Instrument Engineering, Kharkov, Ukraine
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Laboratori Nazionali di Frascati, INFN, Frascati, Italy
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Lawrence Berkeley National Laboratory, Berkeley, California, United States
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Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
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Saha Institute of Nuclear Physics, Kolkata, India
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Faculty of Science, P.J. Šafárik University, Košice, Slovakia
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The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
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Rudjer Bošković Institute, Zagreb, Croatia
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Moscow Engineering Physics Institute, Moscow, Russia
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Laboratori Nazionali di Legnaro, INFN, Legnaro, Italy
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Faculty of Engineering, Bergen University College, Bergen, Norway
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Nuclear Physics Group, STFC Daresbury Laboratory, Daresbury, United Kingdom
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Institut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
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Department of Physics, University of Oslo, Oslo, Norway
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University of Tokyo, Tokyo, Japan
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Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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European Organization for Nuclear Research (CERN), Geneva, Switzerland
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Dipartimento di Fisica dell’Università and Sezione INFN, Turin, Italy
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Department of Physics Aligarh Muslim University, Aligarh, India
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Sezione INFN, Cagliari, Italy
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Institute for Theoretical and Experimental Physics, Moscow, Russia
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Helsinki Institute of Physics (HIP) and University of Jyväskylä, Jyväskylä, Finland
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Dipartimento di Fisica dell’Università and Sezione INFN, Trieste, Italy
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School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom
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Nikhef, National Institute for Subatomic Physics, Amsterdam, Netherlands
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Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru
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Department of Physics, Gauhati University, Guwahati, India
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Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris-Sud, CNRS-IN2P3, Orsay, France
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Institute of Space Sciences (ISS), Bucharest, Romania
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Physics Department, University of Jammu, Jammu, India
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Joint Institute for Nuclear Research (JINR), Dubna, Russia
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Université de Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, Villeurbanne, France
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California Polytechnic State University, San Luis Obispo, California, United States
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Budker Institute for Nuclear Physics, Novosibirsk, Russia
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Dipartimento di Fisica ‘E.R. Caianiello’ dell’Università and Gruppo Collegato INFN, Salerno, Italy
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Dipartimento di Fisica dell’Università ‘La Sapienza’ and Sezione INFN, Rome, Italy
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University of Tennessee, Knoxville, Tennessee, United States
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Institute for High Energy Physics, Protvino, Russia
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Universidade de São Paulo (USP), São Paulo, Brazil
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Dipartimento di Fisica dell’Università and Sezione INFN, Bologna, Italy
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Centro de Investigación y de Estudios Avanzados (CINVESTAV), Mexico City and Mérida, Mexico
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National Institute for Physics and Nuclear Engineering, Bucharest, Romania
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Centre de Calcul de l’IN2P3, Villeurbanne, France
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Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
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Variable Energy Cyclotron Centre, Kolkata, India
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Physics Department, University of Rajasthan, Jaipur, India
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Gangneung-Wonju National University, Gangneung, South Korea
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Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
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Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier, CNRS-IN2P3, Institut Polytechnique de Grenoble, Grenoble, France
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Institut für Informatik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
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V. Fock Institute for Physics, St. Petersburg State University, St. Petersburg, Russia
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Department of Physics, Ohio State University, Columbus, Ohio, United States
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Centro Fermi – Centro Studi e Ricerche e Museo Storico della Fisica “Enrico Fermi”, Rome, Italy
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Dipartimento di Fisica dell’Università and Sezione INFN, Cagliari, Italy
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University of Tsukuba, Tsukuba, Japan
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Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovakia
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Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
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Department of Physics, Sejong University, Seoul, South Korea
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Hua-Zhong Normal University, Wuhan, China
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Universidad Autónoma de Sinaloa, Culiacán, Mexico
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Zentrum für Technologietransfer und Telekommunikation (ZTT), Fachhochschule Worms, Worms, Germany
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University of Houston, Houston, Texas, United States
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Indian Institute of Technology Indore (IIT), Indore, India
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Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Havana, Cuba
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Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
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Sezione INFN, Catania, Italy
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Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
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Pusan National University, Pusan, South Korea
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Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
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SUBATECH, Ecole des Mines de Nantes, Université de Nantes, CNRS-IN2P3, Nantes, France
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Physics Department, The University of Texas at Austin, Austin, TX, United States
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Institute for Nuclear Research, Academy of Sciences, Moscow, Russia
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Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN, Catania, Italy
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Soltan Institute for Nuclear Studies, Warsaw, Poland
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Department of Physics and Technology, University of Bergen, Bergen, Norway
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Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
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Korea Institute of Science and Technology Information, Daejeon, South Korea
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Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
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Physics Department, Panjab University, Chandigarh, India
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Petersburg Nuclear Physics Institute, Gatchina, Russia
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Physics Department, University of Cape Town, iThemba LABS, Cape Town, South Africa
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Sezione INFN, Bari, Italy
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Institute of Physics, Bhubaneswar, India
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Sezione INFN, Turin, Italy
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Russian Federal Nuclear Center (VNIIEF), Sarov, Russia
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Wayne State University, Detroit, Michigan, United States
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Warsaw University of Technology, Warsaw, Poland
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Purdue University, West Lafayette, Indiana, United States
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Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN, Bari, Italy
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Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg, CNRS-IN2P3, Strasbourg, France
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Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Münster, Germany
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Sezione INFN, Rome, Italy
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Physics Department, University of Athens, Athens, Greece
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Nuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež u Prahy, Czech Republic
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Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Sezione INFN, Padova, Italy
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Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine
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Departamento de Física de Partículas and IGFAE, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
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Division of Experimental High Energy Physics, University of Lund, Lund, Sweden
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Sezione INFN, Trieste, Italy
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Hiroshima University, Hiroshima, Japan
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Department of Physics and Centre for Astroparticle Physics and Space Science (CAPSS), Bose Institute, Kolkata, India
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Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States
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Physics Department, Creighton University, Omaha, Nebraska, United States
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Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil
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Technical University of Split FESB, Split, Croatia
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Russian Research Centre Kurchatov Institute, Moscow, Russia
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Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
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Sezione INFN, Bologna, Italy
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Dipartimento di Scienze e Innovazione Tecnologica dell’Università del Piemonte Orientale and Gruppo Collegato INFN, Alessandria, Italy
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Yale University, New Haven, Connecticut, United States
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Chicago State University, Chicago, United States
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Fachhochschule Köln, Köln, Germany
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China Institute of Atomic Energy, Beijing, China
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Commissariat à l’Energie Atomique, IRFU, Saclay, France
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Indian Institute of Technology, Mumbai, India
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Lawrence Livermore National Laboratory, Livermore, California, United States
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KFKI Research Institute for Particle and Nuclear Physics, Hungarian Academy of Sciences, Budapest, Hungary
* e-mail: Angela.Badala@ct.infn.it
Received:
31
August
2012
Published online:
30
October
2012
The production of K∗(892)0 and ϕ(1020) in pp collisions at was measured by the ALICE experiment at the LHC. The yields and the transverse momentum spectra d2
N/dydp
T at midrapidity |y|<0.5 in the range 0<p
T<6 GeV/c for K∗(892)0 and 0.4<p
T<6 GeV/c for ϕ(1020) are reported and compared to model predictions. Using the yield of pions, kaons, and Ω baryons measured previously by ALICE at
, the ratios K∗/K−, ϕ/K∗, ϕ/K−, ϕ/π
−, and
are presented. The values of the K∗/K−, ϕ/K∗ and ϕ/K− ratios are similar to those found at lower centre-of-mass energies. In contrast, the ϕ/π
− ratio, which has been observed to increase with energy, seems to saturate above 200 GeV. The
ratio in the p
T range 1–5 GeV/c is found to be in good agreement with the prediction of the
v2.0 model with a strong colour field.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2012