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9–15 Jul 2017
Victor J. Koningsberger building
Europe/Amsterdam timezone

Strange and heavy hadrons production from coalescence plus fragmentation in AA collisions at RHIC and LHC

13 Jul 2017, 11:10
20m
BBG 169

BBG 169

oral presentation Strangeness production at low baryon densities Parallel Strangeness

Speakers

Salvatore Plumari (University of Catania (Italy)) Vincenzo Greco (University of Catania) Francesco Scardina (INFN Catania)

Description

We study the Λc/D ratio and p/ϕ at RHIC and LHC within a realistic implementation of coalescence model.
The evolution of the partonic stage is described by the relativistic Boltzmann equation tuned at a fixed shear-viscosity to entropy-density ratio η/s and a realistic equation of state.
Such an approach recovers the universal features of the ideal hydrodynamics.
In a coalescence plus independent fragmentation approach we calculate the pT spectra and anisotropic flows vn of the main hadrons:
π,K,p,p¯,Λ,D,Λc,ϕ in a wide range of transverse momentum. Our approach correctly describes the
baryon-to-meson ratios p/π,p¯/π,Λ/K that reach a value of the order of unit at pT3GeV.
In particular we show that in a coalescence plus fragmentation approach one predicts a nearly pT independent p/ϕ ratio up to pT4GeV followed by a significant decrease at higher pT . Such a behavior is
driven by a similar radial flow effect at pT<2GeV and the dominance of fragmentation for ϕ at larger pT.
Moreover in the same framework we evaluate the Λc/D ratio at RHIC and LHC finding a substantial enhancement with respect to pp collisions.

[1] S. Plumari, G. L. Guardo, F. Scardina, V. Greco, Phys.Rev. C92 (2015) no.5, 054902.

[2] S. Plumari, G. L. Guardo, V. Greco, J.-Y. Ollitrault, Nucl.Phys. A941 (2015) 87-96.

[3] V. Minissale, F. Scardina, V. Greco, Phys.Rev. C92 (2015) no.5, 054904.

[4] S. K. Das, J. M. Torres-Rincon, L. Tolos, V. Minissale, F. Scardina, V. Greco, Phys.Rev. D94 (2016) no.11, 114039.

List of tracks Strangeness production at low baryon densities

Authors

Salvatore Plumari (University of Catania (Italy)) Vincenzo Greco (University of Catania) Francesco Scardina (INFN Catania)

Co-authors

Santosh Kumar Das (University of Catania, Italy) Vincenzo Minissale

Presentation materials

Peer reviewing

Paper