Measurement of the production cross-section of $ψ(2S)\to J/ψ(\toμ^+μ^-)π^+π^-$ in $pp$ collisions at $\sqrt{s}=7$ TeV at ATLAS

Abstract

The prompt and non-prompt production cross-sections for $ψ(2S)$ mesons are measured using 2.1 fb$^{-1}$ of $pp$ collision data at a centre-of-mass energy of 7 TeV recorded by the ATLAS experiment at the LHC. The measurement exploits the $ψ(2S)\to J/ψ(\toμ^+μ^-)π^+π^-$ decay mode, and probes $ψ(2S)$ mesons with transverse momenta in the range $10\leq p_T<100$ GeV and rapidity $|y|<2.0$. The results are compared to other measurements of $ψ(2S)$ production at the LHC and to various theoretical models for prompt and non-prompt quarkonium production.

35 pages plus author list + cover pages (58 pages total), 14 figures, 8 tables, submitted to JHEP, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2013-06/