Measurement of charm production at central rapidity in proton-proton collisions at square s = 2.76 TeV
ALICE Collaboration (ukupan broj autora: 988)
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The p(t)-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D-0, D+, and D*(+) in the rapidity range vertical bar y vertical bar LT 0.5, and for transverse momentum 1 LT p(t) LT 12 GeV/c, were measured in proton-proton collisions at root s = 2.76 TeV with the ALICE detector at the Large Hadron Collider. The analysis exploited the hadronic decays D-0 - GT K-pi(+), D+ - GT K-pi(+)pi(+), D*(+) - GT D-0 pi(+), and their charge conjugates, and was performed on a L-int = 1.1 nb(-1) event sample collected in 2011 with a minimum-bias trigger. The total charm production cross section at root s = 2.76 TeV and our previous measurements at root s = 7 TeV. The results were compared to existing measurements and to perturbative-QCD calculations. The fraction of c(d)over-bar D mesons produced in a vector state was also determined.
Source:Journal of High Energy Physics, 2012, 7
- Calouste Gulbenkian Foundation from Lisbon and Swiss Fonds Kidagan, Armenia, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Financiadora de Estudos e Projetos (FINEP), Fundacao de Amparoa Pesquisa do Estado de Sao Paulo (FAPESP), National Natural Science Foundation of China (NSFC), Chinese Ministry of Education (CMOE), Ministry of Science and Technology of China (MSTC), Ministry of Education and Youth of the Czech Republic, Danish Natural Science Research Council, the Carlsberg Foundation, Danish National Research Foundation, The European Research Council under the European Communitys Seventh Framework Programme, Helsinki Institute of Physics and the Academy of Finland, French CNRS-IN2P3, Region Pays de Loire, Region Alsace, Region Auvergne, CEA, France, German BMBF, Helmholtz Association, General Secretariat for Research and Technology, Ministry of Development, Greece, Hungarian OTKA, National Office for Research and Technology (NKTH), Department of Atomic Energy and Department of Science and Technology of the Government of India, Istituto Nazionale di Fisica Nucleare (INFN) of Italy, MEXT Grant-in-Aid for Specially Promoted Research, Japan, Joint Institute for Nuclear Research, Dubna, National Research Foundation of Korea (NRF), CONACYT, DGAPA, Mexico, ALFA-EC and the HELEN Program (High-Energy physics Latin-American-European Network), Stichting voor Fundamenteel Onderzoek der Materie (FOM), Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands, Research Council of Norway (NFR), Polish Ministry of Science and Higher Education, 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, International Science and Technology Center, Russian Academy of Sciences, Russian Federal Agency of Atomic Energy, Russian Federal Agency for Science and Innovations, CERN-INTAS, Ministry of Education of Slovakia, Department of Science and Technology, South Africa, CIEMAT, EELA, Ministerio de Educacion y Ciencia of Spain, Xunta de Galicia (Conselleria de Educacion), CEADEN, Cubaenergia, Cuba, IAEA (International Atomic Energy Agency), Swedish Research Council (VR), Knut and Alice Wallenberg Foundation (KAW), Ukraine Ministry of Education and Science, United Kingdom Science and Technology Facilities Council (STFC), The United States Department of Energy, The United States National Science Foundation, The State of Texas, The State of Ohio