Exclusive $J/\psi$ and $\psi$(2S) production in pp collisions at $ \sqrt{s} = 7$ TeV

The LHCb collaboration
J.Phys. G40 (2013) 045001, 2013.

Abstract (data abstract)
CERN-LHC. Exclusive $J/\psi$ and $\psi(2S)$ vector meson production has been observed in the dimuon channel using the LHCb detector. The cross-section times branching fractions to two muons with pseudorapidities between 2.0 and 4.5 are measured to be \begin{equation*} \sigma_{pp\rightarrow J/\psi (\rightarrow \mu^{+} \mu^{-})} (2.0 <\eta_{\mu^{\pm}}< 4.5) = 307 \pm 21 \pm 36~\text{pb}, \end{equation*} \begin{equation*} \sigma_{pp\rightarrow \psi(2S) (\rightarrow \mu^{+} \mu^{-})} (2.0 <\eta_{\mu^{\pm}}< 4.5) = 7.8 \pm 1.3 \pm 1.0~\text{pb}, \end{equation*} where the first uncertainties are statistical and the second are systematic. The measurements are found to be in good agreement with results from previous experiments and theoretical predictions. The $J/\psi$ photoproduction cross-section has been measured as a function of the photon-proton centre-of-mass energy. The results are consistent with measurements obtained at HERA and confirm a similar power law behaviour for the photoproduction cross-section This analysis uses 36pb-1 data taken in 2010. An update to this measurement using 930pb-1 data taken in 2011 is given in the record http://hepdata.cedar.ac.uk/view/ins1277076 (arXiv:1401.3288).

  • Table 1

    Data from T 3

    10.17182/hepdata.66871.v1/t1

    Cross section times branching ratio to two muons with pseudorapidities between 2.0 and 4.5.

  • Table 2

    Data from T 4

    10.17182/hepdata.66871.v1/t2

    Cross-section measurements (nb) as a function of $J/\psi$ rapidity.

Loading Data...

Ask a Question


Your question will be emailed to those involved with the submission. Please mention the relevant table.


Please log in to HEPData to send a question.