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dc.contributor.authorAlme, Johan
dc.contributor.authorErdal, Hege Austrheim
dc.contributor.authorHelstrup, Håvard
dc.contributor.authorHetland, Kristin Fanebust
dc.contributor.authorKileng, Bjarte
dc.contributor.authorAltinpinar, Sedat
dc.contributor.authorDjuvsland, Øystein
dc.contributor.authorFehlker, Dominik
dc.contributor.authorHaaland, Øystein Senneset
dc.contributor.authorHuang, Meidana
dc.contributor.authorKanaki, Kalliopi
dc.contributor.authorLangøy, Rune
dc.contributor.authorLien, Jørgen
dc.contributor.authorLiu, Lijiao
dc.contributor.authorLønne, Per-Ivar
dc.contributor.authorNystrand, Joakim
dc.contributor.authorRøed, Ketil
dc.contributor.authorRøhrich, Dieter
dc.contributor.authorSkjerdal, Kyrre
dc.contributor.authorSzostak, Artur Krzysztof
dc.contributor.authorUllaland, Kjetil
dc.contributor.authorØvrebekk, Gaute
dc.contributor.authorWagner, Boris
dc.contributor.authorYang, Shiming
dc.contributor.authorDordic, Olja
dc.contributor.authorEyyubova, Gyulnara
dc.contributor.authorKværnø, Henning
dc.contributor.authorLindal, Svein
dc.contributor.authorLøvhøiden, Gunnar
dc.contributor.authorMilosevic, Jovan
dc.contributor.authorNilsson, Mads Stormo
dc.contributor.authorQvigstad, Henrik
dc.contributor.authorRichter, Matthias
dc.contributor.authorSkaali, Toralf Bernhard
dc.contributor.authorTveter, Trine Spedstad
dc.contributor.authorWikne, Jon Christopher
dc.contributor.authorAbelev, Betty
dc.contributor.authorAbrahantes Quintana, Arian
dc.contributor.authorAdam, Jaroslav
dc.contributor.authorAdamová, Dagmar
dc.contributor.authorAdare, Andrew Marshall
dc.contributor.authorAggarwal, Madan M.
dc.contributor.authorAglieri Rinella, Gianluca
dc.contributor.authorAgocs, Andreas Gabor
dc.contributor.authorAgostinelli, Andrea
dc.contributor.authorAguilar Salazar, Saul
dc.contributor.authorAhammed, Zubayer
dc.contributor.authorAhmad, Nazeer
dc.contributor.authorAhmad Masoodi, Arshar
dc.contributor.authorAhn, Sang Un
dc.PublishedAlme J, Erdal HA, Helstrup H, Hetland KF, Kileng B, Altinpinar S, Djuvsland Ø, Fehlker D, Haaland ØS, Huang M, Kanaki K, Langøy R, Lien JA, Liu L, Lønne P, Nystrand J, Røed K, Røhrich D, Skjerdal K, Szostak AK, Ullaland K, Øvrebekk G, Wagner B, Yang S, Dordic O, Eyyubova G, Kværnø H, Lindal S, Løvhøiden G, Milosevic J, Nilsson MS, Qvigstad H, Richter M, Skaali TB, Tveter TS, Wikne JC, Abelev B, Abrahantes Quintana A, Adam J, Adamová D, Adare AM, Aggarwal MM, Aglieri Rinella G, Agocs AG, Agostinelli A, Aguilar Salazar S, Ahammed Z, Ahmad N, Ahmad Masoodi A, Ahn SU. Measurement of prompt J/psi and beauty hadron production cross sections at mid-rapidity in pp collisions at root s=7 TeV. Journal of High Energy Physics (JHEP). 2012(11)eng
dc.description.abstractThe ALICE experiment at the LHC has studied J/ψ production at mid-rapidity in pp collisions at s√=7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity Lint = 5.6 nb−1. The fraction of J/ψ from the decay of long-lived beauty hadrons was determined for J/ψ candidates with transverse momentum pt> 1.3 GeV/c and rapidity |y| < 0.9. The cross section for prompt J/ψ mesons, i.e. directly produced J/ψ and prompt decays of heavier charmonium states such as the ψ(2S) and χc resonances, is σprompt J/ψ (pt> 1.3 GeV/c, |y| < 0.9) = 8.3 ± 0.8 (stat.) ± 1.1 (syst.) +1.5−1.4 (syst. pol.) μb. The cross section for the production of b-hadrons decaying to J/ψ with pt> 1.3 GeV/c and |y| < 0.9 is σJ/ψ←hB (pt > 1.3 GeV/c, |y| < 0.9) = 1.46 ± 0.38 (stat.) +0.26−0.32 (syst.) μb. The results are compared to QCD model predictions. The shape of the pt and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the bb¯¯¯ pair total cross section and dσ/dy at mid-rapidity.en_US
dc.publisherSpringer Verlagen_US
dc.rightsLicensed under Attribution 4.0 International (CC BY 4.0) .eng
dc.titleMeasurement of prompt J/psi and beauty hadron production cross sections at mid-rapidity in pp collisions at root s=7 TeVen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright CERN for the benefit of the ALICE collaboration 2012.en_US
dc.source.journalJournal of High Energy Physics
dc.source.journalJournal of High Energy Physics (JHEP)
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431
dc.subject.nsiVDP::Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430en_US

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Licensed under Attribution 4.0 International (CC BY 4.0) .
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