Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 71, Issue 5, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-011-1645-y
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Funding
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- CERN
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM (Netherlands)
- NWO (Netherlands)
- SCSR (Poland)
- ANCS (Romania)
- MinES of Russia and Rosatom (Russia)
- MICINN (Spain)
- XUNGAL (Spain)
- GENCAT (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NAS Ukraine (Ukraine)
- STFC (United Kingdom)
- NSF (USA)
- ERC
- Region Auvergne
- STFC [PP/E000347/1, ST/G005974/1, ST/H001026/2, ST/K00073X/1, ST/K004646/1, ST/H001093/2, ST/H001077/1, LHCb, ST/I505572/1, LHCb Upgrades, PP/E002722/1, ST/G502412/1, ST/F007094/1, ST/I002839/1, ST/H001085/2, ST/H006737/1, ST/H001026/1, ST/H001166/1, ST/H001093/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H001093/1, ST/H001166/1, PP/E002722/1, ST/I505572/1, ST/H006737/1, GRIDPP, LHCb Upgrades, ST/K00073X/1, ST/H001077/1, LHCb, ST/G502412/1, ST/H001085/2, ST/F007094/1, ST/H001093/2, ST/I002839/1, ST/H001026/1, ST/H001026/2, PP/E000347/1, ST/G005974/1] Funding Source: researchfish
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The production of J/psi mesons in proton-proton collisions at root s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum p(T) and rapidity y in the fiducial region p(T) is an element of [0; 14] GeV/c and y is an element of [2.0; 4.5]. The differential cross-section and fraction of J/psi from b-hadron decays are also measured in the same p(T) and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb(-1). The measured cross-sections integrated over the fiducial region are 10.52 +/- 0.04 +/- 1.40(-2.20)(+1.64) mu b for prompt J/psi production and 1.14 +/- 0.01 +/- 0.16 mu b for J/psi from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/psi production cross-section is obtained assuming no J/psi polarisation and the third error indicates the acceptance uncertainty due to this assumption.
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