Updated measurements of exclusive J/ψ and ψ(2S) production cross-sections in pp collisions at √s = 7 TeV

By L. C. R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, Federico Alessio, M. Alexander, S. Ali, G. Alkhazov and 660 more. 2014

156 citations recorded by the source corpus.

The differential cross-section as a function of rapidity has been measured for the exclusive production of $J/\psi$ and $\psi(2S)$ mesons in proton-proton collisions at $\sqrt{s}=7$ TeV, using data collected by the LHCb experiment, corresponding to an integrated luminosity of 930 pb$^{-1}$. The cross-sections times branching fractions to two muons having pseudorapidities between 2.0 and 4.5 are measured to be $$\begin{array}{rl} \sigma_{pp\rightarrow J/\psi\rightarrow{\mu^+}{\mu^-}}(2.0<\eta_{\mu^\pm }<4.5)=&291\pm 7\pm19 {\rm \ pb},\\ \sigma_{pp\rightarrow\psi(2S)\rightarrow{\mu^+}{\mu^-}}(2.0<\eta_{\mu^\pm}<4.5)=&6.5\pm 0.9\pm 0.4 {\rm \ pb},\end{array}$$ where the first uncertainty is statistical and the second is systematic. The measurements agree with next-to-leading order QCD predictions as well as with models that include saturation effects.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/ba17b29eb7d27ebc005b774d5f4a17eff2161163

Citations in the corpus

• Precision luminosity measurements at LHCb (2014, unknown): “At the LHCb experiment [1] the cross-section measurements for the production of vector bosons (Z and W ) [2,3] and the exclusive two-photon production of muon pairs [4] motivate an accuracy of order 1–2% for the luminosity calibration.”