Enhancement of strange baryons in high-multiplicity proton-proton and proton-nucleus collisions

Abstract

We investigate the enhancement of yields of strange and multi-strange baryons in proton-proton (p+p), proton-lead (p+Pb) and lead-lead (Pb+Pb) collisions at the Large Hadron Collider (LHC) energies from a dynamical core-corona initialization model. We first generate partons just after the collisions by using event generators. These partons dynamically generate the quark gluon plasma (QGP) fluids through the source terms in the hydrodynamic equations. According to the core-corona picture, this process tends to happen where the density of generated partons is high and their transverse momentum is low. Some partons do not fully participate in this process when they are in dilute regions or their transverse momentum is high and subsequently fragment into hadrons through string fragmentation. In this framework, the final hadrons come from either chemically equilibrated fluids as in the conventional hydrodynamic models or string fragmentation. We calculate the ratio of strange baryons to charged pions as a function of multiplicity and find that it monotonically increases up to $d{N}_{\mathrm{ch}}/d\eta \sim 100$ and then saturates above. This suggests that the QGP fluids are \textit{partly} created and that their fraction increases with multiplicity in p+p and p+Pb collisions at LHC energies.

arXiv comment6 pages, 2 figures; published version

References in corpus (27)

• A Brief Introduction to PYTHIA 8.1
• EPOS LHC : test of collective hadronization with LHC data
• New Forms of QCD Matter Discovered at RHIC
• What RHIC Experiments and Theory tell us about Properties of Quark-Gluon Plasma ?
• Decoding the phase structure of QCD via particle production at high energy
• Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
• Multiplicity Dependence of Pion, Kaon, Proton and Lambda Production in p-Pb Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Early thermalization at RHIC
• Perfect Fluidity of the Quark Gluon Plasma Core as Seen through its Dissipative Hadronic Corona
• Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Novel Collective Phenomena in High-Energy Proton-Proton and Proton-Nucleus Collisions
• Core-Corona Separation in Ultra-Relativistic Heavy Ion Collisions
• Dynamical initial state model for relativistic heavy-ion collisions
• Enhanced strange baryon production in Au+Au collisions compared to p+p at sqrts = 200 GeV
• Energy dependence of hyperon production in nucleus-nucleus collisions at SPS
• Dynamically integrated transport approach for heavy-ion collisions at high baryon density
• Centrality Dependence of Strangeness Enhancement in Ultrarelativistic Heavy Ion Collisions - a Core-Corona Effect
• Cascade and anti-cascade production in central Pb+Pb collisions at 158 GeV/c per nucleon
• Effects of hadronic rescattering on multistrange hadrons in high-energy nuclear collisions
• Centrality dependence of strangeness production in heavy-ion collisions as a geometrical effect of core-corona superposition
• Diffractive and non-diffractive wounded nucleons and final states in pA collisions
• New approach to initializing hydrodynamic fields and mini-jet propagation in quark-gluon fluids
• Core-corona separation in the UrQMD hybrid model
• No-scale D-term inflation with stabilized moduli
• Resonance production in high energy collisions from small to big systems
• Interplay of the emission from thermal and direct sources in relativistic heavy ion collisions
• Core-corona interplay in Pb-Pb collisions at $\sqrt{s_{NN}}$=2.76 TeV

Cited by in corpus (8)

• Unified description of hadron yield ratios from dynamical core-corona initialization
• Mean-field update in the JAM microscopic model: Mean-field effects on collective flow in high-energy heavy-ion collisions at $\sqrt{s_{NN}}=2-20$ GeV energies
• Interplay between core and corona components in high-energy nuclear collisions
• Dynamical initialization and hydrodynamic modeling of relativistic heavy-ion collisions
• Mini-jet quenching in a concurrent jet+hydro evolution and the non-equilibrium quark-gluon plasma
• Non-equilibrium components in very low transverse momentum region in high-energy nuclear collisions
• Hydrodynamic description of the baryon-charged quark-gluon plasma
• Strangeness Enhancement in p+p, p+Pb and Pb+Pb Collisions at LHC Energies