Single string structure and multiple string interaction effect on strange particle production in pp collisions at $\sqrt{s}=7$ TeV

Abstract

We present a systematic study on the strange particle production at the Large Hadron Collider (LHC) in proton-proton (pp) collisions at $\sqrt{s}=$ 7 TeV based on PACIAE simulations. Two different mechanisms accounting for single string structure variations and multiple string interactions are implemented in the simulations. These modifications give rise to increased effective string tension in the Lund fragmentation model and generate more strange particles in the hadronic final state. By comparing the results with a wealth of the LHC data, it is turned out that the inclusion of variable effective string tension is capable to reach an improved agreement between theory and experiment, especially on the recently observed multiplicity dependence of strangeness enhancement in pp collisions. This approach provides us a new method to understand the microscopic picture of the novel high multiplicity pp events collected at the LHC in the string fragmentation framework.

References in corpus (22)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• An Introduction to PYTHIA 8.2
• EPOS LHC : test of collective hadronization with LHC data
• Tuning Monte Carlo Generators: The Perugia Tunes
• Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
• Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 7 TeV
• Evidence for collectivity in pp collisions at the LHC
• Long-range angular correlations of $\pi$, K and p in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Charged-particle multiplicity measurement in proton-proton collisions at $\sqrt{s}$ = 7 TeV with ALICE at LHC
• Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Measurement with the ATLAS detector of multi-particle azimuthal correlations in p+Pb collisions at sqrt(s_NN)=5.02 TeV
• Multi-Strange Baryon Production in Au-Au collisions at sqrt(s_NN) = 130 GeV
• Thermodynamical String Fragmentation
• Centrality Dependence of Strangeness Enhancement in Ultrarelativistic Heavy Ion Collisions - a Core-Corona Effect
• PACIAE 2.0: An updated parton and hadron cascade model (program) for the relativistic nuclear collisions
• Melting Hadrons, Boiling Quarks
• Increase of Effective String Tension and Production of Strange Particles
• Multiplicity dependence of light flavour hadron production at LHC energies in the strangeness canonical suppression picture
• Strange quark suppression and strange hadron production in pp collisions at RHIC and LHC

Cited by in corpus (6)

• Identifying an $\mathrm{X}(3872)$ tetraquark state versus a molecular state by formation time, velocity and temperature in relativistic nuclear collisions
• The study on the structure of exotic states ${\chi }_{c1}(3872)$ via beauty-hadron decays in $pp$ collisions at $\sqrt{s}=8\mathrm{TeV}$
• X(2370) glueball-like particle productions in $e^{+}{e}^{-}$ collisions at the BESIII energy and in pp collisions at the LHC energy with PACIAE model
• Impact of single string structure and multiple string interaction on strangeness production in Pb+Pb collisions at $\sqrt{S_{NN}}=2.76$ TeV
• Strange particle production in jets and underlying events in pp collisions at $\sqrt{s}=7$ TeV with PYTHIA8 generator
• Investigating jet induced identified hadron productions from the relative transverse activity classifier in pp collision at LHC