Model studies of V0 production ratios in $pp$ collisions at $\sqrt{\mathrm{s}}$ = 0.2, 0.9, and 7 TeV

Abstract

A comparative study of V 0 ratios has been performed between HIJING, Sibyll and QGSJET model based event generators in this paper. The ratios under study are Λ/Λ, Λ/K 0 S and Ξ − /Λ as a function of rapidity y, rapidity loss (∆y) and pT from pp collisions at √ s = 0.2, 0.9, and 7 TeV and these simulations are then compared with the STAR and LHCb fiducial phase spaces in different pT regions. Although the models could produce some of the ratios in a limited pT and / or y region but none of them completely predicts the experimental results. The QGSJET has good predictions with the data in most of the cases but since the model does not include the Ξ particle definition, therefore it does not give any predictions for Ξ/Λ ratios. The extrapolation to highest possible energies can be studied by re-tune some of the basic parameters based on current and previous measurements. These kind of systematic comparison studies are also useful in order to apply certain constraints on the pQCD and non-pQCD based hadronic event generators to significantly improve the predictions of Standard Model physics at the RHIC and LHC experimental data for the understanding of underlying physics mechanisms in high energy collisions.