Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-11-05
Phys.Rev.D 85 (2012) 012001
Physics
High Energy Physics
High Energy Physics - Experiment
16 pages plus author list (29 pages total), 24 figures, 2 tables, submitted to Physical Review D
Scientific paper
10.1103/PhysRevD.85.012001
The production of Kshort and Lambda hadrons is studied in inelastic pp collisions at sqrt(s) = 0.9 and 7 TeV collected with the ATLAS detector at the LHC using a minimum-bias trigger. The observed distributions of transverse momentum, rapidity, and multiplicity are corrected to hadron level in a model-independent way within well defined phase-space regions. The distribution of the production ratio of Lambdabar to Lambda baryons is also measured. The results are compared with various Monte Carlo simulation models. Although most of these models agree with data to within 15% in the Kshort distributions, substantial disagreements with data are found in the Lambda distributions of transverse momentum.
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