LHCb Collaboration (Including: Back, J. J., Craik, Daniel, Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Whitehead, M. (Mark) and Williams, M. P.). (2012) Measurement of prompt hadron production ratios in pp collisions at √s=0.9 and 7 TeV. European Physical Journal C, Volume 72 (Number 10). Article number 2168. doi:10.1140/epjc/s10052-012-2168-x ISSN 1434-6044.

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Abstract

The charged-particle production ratios pˉ/p , K −/K +, π −/π +, (p+pˉ)/(π++π−) , (K ++K −)/(π ++π −) and (p+pˉ)/(K++K−) are measured with the LHCb detector using 0.3 nb−1 of pp collisions delivered by the LHC at √s=0.9 TeV and 1.8 nb−1 at √s=7 TeV . The measurements are performed as a function of transverse momentum p T and pseudorapidity η. The production ratios are compared to the predictions of several Monte Carlo generator settings, none of which are able to describe adequately all observables. The ratio pˉ/p is also considered as a function of rapidity loss, Δy≡y beam−y, and is used to constrain models of baryon transport.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Mathematical physics, Standard model (Nuclear physics), Monte Carlo method, Hadrons , Particles (Nuclear physics)
Journal or Publication Title:	European Physical Journal C
Publisher:	Springer
ISSN:	1434-6044
Official Date:	October 2012
Dates:	Date Event October 2012 Published
Volume:	Volume 72
Number:	Number 10
Article Number:	Article number 2168
DOI:	10.1140/epjc/s10052-012-2168-x
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	24 December 2015
Date of first compliant Open Access:	24 December 2015
Funder:	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), European Organization for Nuclear Research (CERN), 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), 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), SCSR (Poland), Autoritatea Nationala pentru Cercetare Stiintifica (ANCS), Federalʹnoe agentstvo po atomnoĭ ėnergii (Russia), Russia (Federation). Ministerstvo obrazovanii︠a︡ i nauki [Ministry of Education and Science], Spain. Ministerio de Ciencia e Innovación (MICINN), Galicia (Spain : Region). Xunta, Catalonia (Spain), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Natsionalʹna akademiia nauk Ukraïny (NAS), Science and Technology Facilities Council (Great Britain) (STFC), National Science Foundation (U.S.) (NSF), European Research Council (ERC), Seventh Framework Programme (European Commission) (FP7), Auvergne (France)

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