# Strangeness in Quark Matter 2017

9-15 July 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

### Speakers

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

### Description

We study the $\Lambda_c/D$ ratio and $p/\phi$ 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 $\eta/s$ 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 $p_T$ spectra and anisotropic flows $v_n$ of the main hadrons:
$\pi, K, p, \bar{p},\Lambda, D, \Lambda_c, \phi$ in a wide range of transverse momentum. Our approach correctly describes the
baryon-to-meson ratios $p/\pi,\bar{p}/\pi, \Lambda/K$ that reach a value of the order of unit at $p_T \sim 3 GeV$.
In particular we show that in a coalescence plus fragmentation approach one predicts a nearly $p_T$ independent $p/\phi$ ratio up to $p_T \sim 4 GeV$ followed by a significant decrease at higher $p_T$ . Such a behavior is
driven by a similar radial flow effect at $p_T < 2 GeV$ and the dominance of fragmentation for $\phi$ at larger $p_T$.
Moreover in the same framework we evaluate the $\Lambda_c/D$ 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

### Primary 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)

Paper files: