D-S(+) meson production at central rapidity in proton-proton collisions at root s=7 TeV
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
06/11/2013
06/11/2013
2012
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Resumo |
The P-T-differential inclusive production cross section of the prompt charm-strange meson D-s(+) in the rapidity range vertical bar y vertical bar < 0.5 was measured in proton-proton collisions at root s = 7 TeV at the LHC using the ALICE detector. The analysis was performed on a data sample of 2.98 x 10(8) events collected with a minimum-bias trigger. The corresponding integrated luminosity is L-int = 4.8 nb(-1). Reconstructing the decay D-s(+) -> phi pi(+) with phi -> K-K+, and its charge conjugate, about 480 D-s(+/-) mesons were counted, after selection cuts, in the transverse momentum range 2 < P-T < 12 GeV/c. The results are compared with predictions from models based on perturbative QCD. The ratios of the cross sections of four D meson species (namely D-0, D+, D*+ and D-s(+)) were determined both as a function of p(T) and integrated over p(T)after extrapolating to full p(T) range, together with the strangeness suppression factor in charm fragmentation. The obtained values are found to be compatible within uncertainties with those measured by other experiments in e(+)e(-), ep and pp interactions at various centre-of-mass energies. (C) 2012 CERN. Published by Elsevier By. All rights reserved. Calouste Gulbenkian Foundation from Lisbon Calouste Gulbenkian Foundation from Lisbon Swiss Fonds Kidagan, Armenia Swiss Fonds Kidagan, Armenia Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Financiadora de Estudos e Projetos (FINEP) Financiadora de Estudos e Projetos (FINEP) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Ministry of Education and Youth of the Czech Republic Ministry of Education and Youth of the Czech Republic Danish Natural Science Research Council Danish Natural Science Research Council Carlsberg Foundation Carlsberg Foundation Danish National Research Foundation Danish National Research Foundation European Research Council under the European Community European Research Council under the European Community Helsinki Institute of Physics Helsinki Institute of Physics Academy of Finland Academy of Finland French CNRS-IN2P3 French CNRSIN2P3 Region Pays de Loire Region Pays de Loire Region Alsace Region Alsace Region Auvergne Region Auvergne CEA, France CEA, France German BMBF German BMBF Helmholtz Association Helmholtz Association General Secretariat for Research and Technology, Ministry of Development, Greece General Secretariat for Research and Technology, Ministry of Development, Greece Hungarian OTKA Hungarian OTKA National Office for Research and Technology (NKTH) National Office for Research and Technology (NKTH) Department of Atomic Energy Department of Atomic Energy Department of Science and Technology of the Government of India Department of Science and Technology of the Government of India Istituto Nazionale di Fisica Nucleare (INFN) of Italy Istituto Nazionale di Fisica Nucleare (INFN) of Italy MEXT, Japan MEXT, Japan Joint Institute for Nuclear Research, Dubna Joint Institute for Nuclear Research, Dubna National Research Foundation of Korea (NRF) National Research Foundation of Korea (NRF) CONACYT CONACYT DGAPA, Mexico DGAPA, Mexico ALFAEC ALFA-EC HELEN Program (High-Energy physics Latin-American-European Network) HELEN Program (HighEnergy physics LatinAmericanEuropean Network) Stichting voor Fundamenteel Onderzoek der Materie (FOM) Stichting voor Fundamenteel Onderzoek der Materie (FOM) Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands Research Council of Norway (NFR) Research Council of Norway (NFR) Polish Ministry of Science and Higher Education Polish Ministry of Science and Higher Education National Authority for Scientific Research - NASR (Autoritatea Nationala pentru Cercetare Stiintifica - ANCS) National Authority for Scientific Research NASR (Autoritatea Nationala pentru Cercetare Stiintifica ANCS) Federal Agency of Science of the Ministry of Education and Science of Russian Federation Federal Agency of Science of the Ministry of Education and Science of Russian Federation International Science and Technology Center International Science and Technology Center Russian Academy of Sciences Russian Academy of Sciences Russian Federal Agency of Atomic Energy Russian Federal Agency of Atomic Energy Russian Federal Agency for Science and Innovations and CERN-INTAS Russian Federal Agency for Science and Innovations and CERNINTAS Ministry of Education of Slovakia Ministry of Education of Slovakia Department of Science and Technology, South Africa Department of Science and Technology, South Africa CIEMAT CIEMAT EELA EELA Ministerio de Educacion y Ciencia of Spain Ministerio de Educacion y Ciencia of Spain Xunta de Galicia (Conselleria de Educacion) Xunta de Galicia (Conselleria de Educacion) CEADEN CEADEN Cubaenergia, Cuba Cubaenergia, Cuba IAEA (International Atomic Energy Agency) IAEA (International Atomic Energy Agency) Swedish Research Council (VR) Swedish Research Council (VR) Knut & Alice Wallenberg Foundation (KAW) Knut & Alice Wallenberg Foundation (KAW) Ukraine Ministry of Education and Science Ukraine Ministry of Education and Science United Kingdom Science and Technology Facilities Council (STFC) United Kingdom Science and Technology Facilities Council (STFC) United States Department of Energy United States Department of Energy United States National Science Foundation United States National Science Foundation State of Texas State of Texas State of Ohio State of Ohio |
Identificador |
PHYSICS LETTERS B, AMSTERDAM, v. 718, n. 2, supl. 1, Part 1, pp. 279-294, DEC 5, 2012 0370-2693 http://www.producao.usp.br/handle/BDPI/42231 10.1016/j.physletb.2012.10.049 |
Idioma(s) |
eng |
Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
Relação |
PHYSICS LETTERS B |
Direitos |
closedAccess Copyright ELSEVIER SCIENCE BV |
Palavras-Chave | #THERMAL HADRON-PRODUCTION #HEAVY-ION COLLISIONS #STATISTICAL HADRONIZATION #INCLUSIVE PRODUCTION #CHARM PRODUCTION #PP COLLISIONS #B-DECAYS #FRAGMENTATION #LHC #MATTER #PHYSICS, MULTIDISCIPLINARY |
Tipo |
article original article publishedVersion |