LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Craik, Daniel, Dossett, D., Gershon, T. J., Kreps, Michal, Latham, Thomas, O'Hanlon, D. P., Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Whitehead, M. (Mark) and Wallace, Charlotte). (2014) Observation of Z production in proton-lead collisions at LHCb. Journal of High Energy Physics, Volume 2014 (Number 9). Article number 30. doi:10.1007/JHEP09(2014)030

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Abstract

The first observation of Z boson production in proton-lead collisions at a centre-of-mass energy per proton-nucleon pair of √sNN = 5 TeV is presented. The data sample corresponds to an integrated luminosity of 1.6 nb−1 collected with the LHCb detector. The Z candidates are reconstructed from pairs of oppositely charged muons with pseudorapidities between 2.0 and 4.5 and transverse momenta above 20 GeV/c. The invariant dimuon mass is restricted to the range 60 − 120 GeV/c. The Z production cross-section is measured to be

σZ→μ+μ−(fwd)=13.5+5.4−4.0(stat.)±1.2(syst.) nb

in the direction of the proton beam and

σZ→μ+μ−(bwd)=10.7+8.4−5.1(stat.)±1.0(syst.) nb

in the direction of the lead beam, where the first uncertainty is statistical and the second systematic.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Z bosons, Large Hadron Collider (France and Switzerland), Heavy ion collisions, Electroweak interactions
Journal or Publication Title:	Journal of High Energy Physics
Publisher:	Springer
ISSN:	1029-8479
Official Date:	3 September 2014
Dates:	Date Event 3 September 2014 Published 12 June 2014 Submitted 25 July 2014 Modified 19 August 2014 Accepted
Date of first compliant deposit:	28 December 2015
Volume:	Volume 2014
Number:	Number 9
Article Number:	Article number 30
DOI:	10.1007/JHEP09(2014)030
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access
Funder:	European Organization for Nuclear Research (CERN), Brazil. Coordenação do Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ), Financiadora de Estudos e Projetos (Brazil) (FINEP), Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC), Centre national de la recherche scientifique (France) (CNRS), Institut national de physique nucléaire et de physique des particules (IN2P3), Germany. Bundesministerium für Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Hermann von Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF), Max-Planck-Gesellschaft zur Förderung der Wissenschaften [Max Planck Society for the Advancement of Science], Science Foundation Ireland (SFI), Istituto nazionale di fisica nucleare (INFN), Stichting voor Fundamenteel Onderzoek der Materie (FOM) [Foundation for Fundamental Research on Matter], Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO), Poland. Ministerstwo Nauki i Szkolnictwa Wyższego [Ministry of Science and Higher Education] (MNiSW), Narodowe Centrum Nauki (NCN), MEN (Romania), Institutul de Fizică Atomică (IFA), Russia (Federation). Ministerstvo obrazovanii︠a︡ [Ministry of Education], Russia (Federation). Federal Agency of Scientific Organizations (FANO), Spain. Ministerio de Economía y Competitividad [Ministry of Economy and Competitiveness] (MINECO), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Switzerland. Staatssekretariat für Ausbildung und Forschung (SER), Nat͡sionalʹna akademii͡a nauk Ukraïny [National Academy of Sciences of Ukraine] (NASU), Science and Technology Facilities Council (Great Britain) (STFC), National Science Foundation (U.S.) (NSF), Karlsruher Institut für Technologie (KIT), SURF Foundation, PIC (Spain), GridPP, European Particle physics Latin American NETwork (EPLANET), Marie Skłodowska-Curie actions, European Research Council (ERC), Conseil général de Haute-Savoie, Labex ENIGMASS, Origines Constituants & Evolution de l'Univers (OCEVU), Auvergne (France), Rossiĭskiĭ fond fundamentalʹnykh issledovaniĭ [Russian Foundation for Basic Research] (RFBR), Galicia (Spain : Region). Xunta, Catalonia (Spain), Royal Society (Great Britain), Great Britain. Royal Commission for the Exhibition of 1851

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