Study of the Production of Strange Particles in Proton–Proton Collisions at √s = 0.9 TeV

  • M. AjazEmail author
  • M. Tufail
  • Y. Ali
Research Article - Physics


The differential yield of strange mesons \( (K_{s}^{0} ,\phi ) \) and singly and doubly strange baryons (Λ, \( \bar{\varLambda } \) and Ξ) in pp collision at 0.9 TeV in the transverse momentum (pT) ranging from 0.1 to 3.5 GeV/c and in the rapidity region of |y| <0.75 is reported. The spectra obtained by Monte Carlo simulations with event generators: EPOS 1.99, EPOS-LHC, HIJING 1.38, QGSJETII-04 and Sibyll2.3c, are compared with the ALICE measurements. For \( K_{s}^{0} \), EPOS-LHC, Sibyll2.3c and QGSJETII-04 models’ predictions are closer to the experimental data at low pT. For Λ and \( \bar{\varLambda } \), EPOS 1.99 and QGSJETII-04 predict in some of the pT regions, while only EPOS 1.99 model predicts well the Ξ spectra. QGSJETII-04 and Sibyll2.3c predict well the distribution of \( \phi \) mesons at high pT. For Λ/\( K_{s}^{0} \), only QGSJETII-04 predicts the ratio very well. Although the models are qualitatively compatible with the data, none of them predict all the distributions over the entire pT range.


Strange hadrons LHC energies Models’ predictions QCD 



This work was supported by the Higher Education Commission (HEC) of Pakistan by the Grant No. 20-3379/NRPU/R&D/HEC/2014.


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Copyright information

© King Fahd University of Petroleum & Minerals 2019

Authors and Affiliations

  1. 1.Department of PhysicsAbdul Wali khan University MardanMardanPakistan
  2. 2.Department of PhysicsCOMSATS University IslamabadIslamabadPakistan

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