HEP Seminar: Measurement of the production cross-section of psi(2s)->J/psi Pi Pi using the ATLAS detector

Lee Allison, University of Lancaster

Friday 13 December 2013, 1300-1400
Frankland Colloquium Room

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 studies the ψ(2S) → J/ψ(→ μ+ μ− )π + π − decay mode, and probes ψ(2S) with transverse momenta in the range pT = 10 − 100 GeV and rapidity |y| < 2.0. The results are compared to existing LHC ψ(2S) production measurements and theoretical models for prompt and non-prompt production.