Measurement of ϒ production in pp collisions at √s =7 TeV

The Lhcb Collaboration

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86 Scopus citations

Abstract

The production of Υ{hooked}(1S), Υ{hooked}(2S) and Υ{hooked}(3S) mesons in proton-proton collisions at the centre-of-mass energy of √ s = 7TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb<sup>-1</sup> collected at the Large Hadron Collider. The Υ{hooked} mesons are reconstructed in the decay mode Υ{hooked}→μ<sup>+</sup>μ<sup>-</sup> and the signal yields are extracted from a fit to the μ<sup>+</sup>μ<sup>-</sup> invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the Υ{hooked} transverse momentum p<sub>T</sub> and rapidity y, over the range p<sub>T</sub><15 GeV/c and 2. 0<y<4. 5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to be [Equation not available: see fulltext.] where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three Υ{hooked} states.

Original languageEnglish (US)
Article number2025
JournalEuropean Physical Journal C
Volume72
Issue number6
DOIs
StatePublished - Jun 7 2012

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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