Analyzing radial flow features inp-Pb andp-pcollisions at several TeV by studying identified-particle production with the event generator EPOS3

2013/12/04 by K. Werner, B. Guiot, Iu. Karpenko +1 · 4 citations
Physics and Astronomy · #Baryon #Hadron #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Pion #Pomeron #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scattering #Spectral line #astro-ph.HE #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevc.89.064903

published as Phys. Rev. C 89, 064903 (2014)

arxiv created 2013/12/04 · openalex publication_date 2014/06/09 · arxiv updated 2014/06/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Experimental transverse momentum spectra of identified particles in p-Pb collisions at 5.02 TeV show many similarities to the corresponding Pb-Pb results, the latter ones usually being interpreted in terms of hydrodynamic flow. We analyze these data using epos3, an event generator based on a 3D+1 viscous hydrodynamical evolution starting from flux-tube initial conditions, which are generated in the Gribov-Regge multiple scattering framework. An individual scattering is referred to as Pomeron, identified with a parton ladder, eventually showing up as flux tubes (or strings). Each parton ladder is composed of a perturbative QCD hard process, plus initial- and final-state linear parton emission. Nonlinear effects are considered by using saturation scales Q_s, depending on the energy and the number of participants connected to the Pomeron in question. We compute transverse momentum (p_t) spectra of pions, kaons, protons, lambdas, and \ensuremathΞ baryons in p-Pb and p-p scattering, compared to experimental data and many other models. In this way we show in a quantitative fashion that p-Pb data (and even p-p ones) show the typical ``flow effect'' of enhanced particle production at intermediate p_t values, more and more visible with increasing hadron mass.

Citations

• Wilson renormalization group for lowxphysics: Towards the high density regime
• The BFKL equation from the Wilson renormalization group
• Event generation with SHERPA 1.1
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Nonstationary irreversible thermodynamics: A causal relativistic theory
• The anti-ktjet clustering algorithm
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Cited by

• EPOS LHC: Test of collective hadronization with data measured at the CERN Large Hadron Collider
• Pseudorapidity and transverse-momentum distributions of charged particles in proton–proton collisions at s=13 TeV
• Impact of the initial size of spatial fluctuations on the collective flow in Pb–Pb collisions at √s_\rm NN = 2.76 TeV
• Novel collective phenomena in high-energy proton–proton and proton–nucleus collisions
• Elliptic flow in ultrarelativistic collisions with light polarized nuclei