Spires | JHEP 05 (2011) 064 | doi:10.1007/JHEP05(2011)064 | arXiv:1102.4282 [hep-ex]
The spectra of Kshort, Lambda, and Cascade- particles were measured versus transverse-momentum (pT) and rapidity(y) in proton-proton collisions at center-of-mass energies 900 and 7000 GeV. The production is normalized to all non-single-diffractive (NSD) events using corrections for trigger and selection efficiency, acceptance, and branching ratios. The results cover a rapidity range of |y|<2 and a pT range from 0 to 10 GeV (Kshort and Lambda) and 0 to 6 GeV (Cascade-). Antiparticles are included in all measurements so only the sum of Lambda and Lambdabar and Cascade- and anti-Cascade- are given. The rapidity distributions are shown versus |y| but normalized to a unit of y. Ratios of Lambda/Kshort and Cascade-/Lambda production versus pT and |y| are also given, with somewhat smaller systematic uncertainties than obtained from taking the ratio of the individual distributions.' The data were corrected according to the SD/DD/ND content of the CMS trigger, as predicted by pythia6. The uncertainties connected with correct or uncorrect modelling of diffraction were included in the systematic errors.
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