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Journal Articles Physical Review C Year : 2014

Analysing radial flow features in p-Pb and p-p collisions at several TeV by studying identified particle production in EPOS3

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Klaus Werner
Iu. Karpenko
  • Function : Author
T. Pierog
  • Function : Author

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 term of hydrodynamic flow. We analyse 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 pQCD 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 $\Xi$ 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.

Dates and versions

in2p3-00914184 , version 1 (05-12-2013)

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Klaus Werner, B. Guiot, Iu. Karpenko, T. Pierog. Analysing radial flow features in p-Pb and p-p collisions at several TeV by studying identified particle production in EPOS3. Physical Review C, 2014, 89 (6), pp.064903. ⟨10.1103/PhysRevC.89.064903⟩. ⟨in2p3-00914184⟩
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