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Measurement of the cross section and angular correlations for associated production of a Z boson with b hadrons in pp collisions at root s=7 TeV

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2013
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Authors
Chatrchyan, S.
Adžić, Petar
Đorđević, Miloš
Ekmedzic, M.
Krpic, D.
Milošević, Jovan
Milenović, Predrag
Rekovic, V.
CMS Collaboration (ukupan broj autora: 2208)
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Abstract
A study of proton-proton collisions in which two b hadrons are produced in association with a Z boson is reported. The collisions were recorded at a centre-of-mass energy of 7 TeVwith the CMS detector at the LHC, for an integrated luminosity of 5.2 fb(-1). The b hadrons are identified by means of displaced secondary vertices, without the use of reconstructed jets, permitting the study of b-hadron pair production at small angular separation. Differential cross sections are presented as a function of the angular separation of the b hadrons and the Z boson. In addition, inclusive measurements are presented. For both the inclusive and differential studies, different ranges of Z boson momentum are considered, and each measurement is compared to the predictions from different event generators at leading-order and next-to-leading-order accuracy.
Keywords:
Hadron-Hadron Scattering
Source:
Journal of High Energy Physics, 2013, 12
Projects:
  • Austrian Federal Ministry of Science and Research, Austrian Science Fund, Belgian Fonds de la Recherche Scientifique, Fonds voor Wetenschappelijk Onderzoek, CNPq, CAPES, FAPERJ, FAPESP, Bulgarian Ministry of Education, Youth and Science, 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, Ministry of Education and Research [SF0690030s09], European Regional Development Fund, Estonia, Academy of Finland, Finnish Ministry of Education and Culture, Helsinki Institute of Physics, Institut National de Physique Nucleaire et de Physique des Particules / CNRS, Commissariat a lEnergie Atomique et aux Energies Alternatives / CEA, France, Bundesministerium fur Bildung und Forschung, Deutsche Forschungsgemeinschaft, Helmholtz-Gemeinschaft Deutscher Forschungszentren, Germany, General Secretariat for Research and Technology, Greece, National Scientific Research Foundation, National Office for Research and Technology, Hungary, Department of Atomic Energy, 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, Republic of Korea, Lithuanian Academy of Sciences, CINVESTAV, CONACYT, SEP, UASLP-FAI, Ministry of Science and Innovation, New Zealand, Pakistan Atomic Energy Commission, Ministry of Science and Higher Education, National Science Centre, Poland, Fundacao para a Ciencia e a Tecnologia, Portugal, JINR (Armenia), JINR (Belarus), JINR (Georgia), JINR (Ukraine), JINR (Uzbekistan), Ministry of Education and Science of the Russian Federation, Federal Agency of Atomic Energy of the Russian Federation, Russian Academy of Sciences, Russian Foundation for Basic Research, Ministry of Science and Technological Development of Serbia, Secretaria de Estado de Investigacion, Desarrollo e Innovacion and Programa Consolider-Ingenio, Spain, ETH Board, ETH Zurich, PSI, SNF, UniZH, Canton Zurich, SER, National Science Council, Taipei, Thailand Center of Excellence in Physics, Institute for the Promotion of Teaching Science and Technology of Thailand, National Science and Technology Development Agency of Thailand, Scientific and Technical Research Council of Turkey, Turkish Atomic Energy Authority, Science and Technology Facilities Council, U.K., US Department of Energy, US National Science Foundation, Marie-Curie programme, European Research Council, EPLANET (European Union), Leventis Foundation, A.P. Sloan Foundation, Alexander von Humboldt Foundation, Belgian Federal Science Policy Office, Fonds pour la Formation a la Recherche dans lIndustrie et dans lAgriculture (FRIA-Belgium), Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium), Ministry of Education, Youth and Sports (MEYS) of Czech Republic, Council of Science and Industrial Research, India, Compagnia di San Paolo (Torino), HOMING PLUS programme of Foundation for Polish Science, EU, Regional Development Fund, Thalis programme, Aristeia programme, EU-ESF, Greek NSRF

DOI: 10.1007/JHEP12(2013)039

ISSN: 1029-8479

WoS: 000328349600001

Scopus: 2-s2.0-84897838159
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URI
http://vinar.vin.bg.ac.rs/handle/123456789/5796
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