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Measurement of Υ production in pp collisions at √s=2.76TeV

AuthorsAaij, R.; Martínez-Vidal, Fernando ; Zvyagin, A.; LHCb Collaboration; Oyanguren, Arantza ; Ruiz Valls, Pablo
Issue Date29-Apr-2014
CitationEuropean Physical Journal C - Particles and Fields 74: 2835 (2014)
AbstractThe production of Υ(1S) , Υ(2S) and Υ(3S) mesons decaying into the dimuon final state is studied with the LHCb detector using a data sample corresponding to an integrated luminosity of 3.3pb−1 collected in proton–proton collisions at a centre-of-mass energy of s√=2.76 TeV. The differential production cross-sections times dimuon branching fractions are measured as functions of the Υ transverse momentum and rapidity, over the ranges pT<15 GeV/ c and 2.0<y<4.5 . The total cross-sections in this kinematic region, assuming unpolarised production, are measured to be σ(pp→Υ(1S)X)×B(Υ(1S)→μ+μ−) =1.111±0.043±0.044nb, σ(pp→Υ(2S)X)×B(Υ(2S)→μ+μ−) where the first uncertainty is statistical and the second =0.264±0.023±0.011nb, σ(pp→Υ(3S)X)×B(Υ(3S)→μ+μ−) =0.159±0.020±0.007nb, systematic.
DescriptionAaij, R. et al.
Publisher version (URL)http://dx.doi.org/10.1140/epjc/s10052-014-2835-1
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