30-31 July 2018
Instituto de Física da Universidade de São Paulo
America/Sao_Paulo timezone
Evento comemorativo dos 10 anos da Rede Nacional de Física de Altas Energias

Measuring multi-strange hadron in heavy-ion collisions at the LHC with ALICE

30 Jul 2018, 12:15
15m
Auditório Novo 1 (Instituto de Física da Universidade de São Paulo)

Auditório Novo 1

Instituto de Física da Universidade de São Paulo

Análise de Dados Análise de Dados

Speaker

Danilo Silva De Albuquerque (University of Campinas UNICAMP (BR))

Description

A strongly interacting state of matter known as the Quark-Gluon Plasma (QGP) is formed in the high temperature and energy density conditions reached in ultra-relativistic heavy-ion collisions. Historically, one of the signatures of the formation of such a system was the enhanced production of strange and multi-strange hadrons with respect to non-strange. The ALICE detector is ideally suited to study identified particle production rates. The excellent tracking and particle identification capabilities allow the reconstruction of multi-strange baryons (Ξ−, Ξ ̄+, Ω− and Ω ̄+) via their weak decay channels over a large range in transverse momentum (pT). In this work, we report on the pT spectra and total yield of such hadrons at central rapidity in several centrality classes as measured by ALICE for Pb-Pb collisions at the energy of √sNN = 5.02 TeV and for Xe-Xe collisions at √sNN = 5.44 TeV. The yields are normalized by the corresponding measurement of pion production in the same centrality class in order to study the enhancement of multi-strange hadrons. Comparison of hyperon-to-pion ratio between different systems, such as pp, p-Pb, Xe-Xe and Pb-Pb collisions shows that production of multi-strange baryons relative to pions follows a continuously increasing trend from low multiplicity pp to central AA collisions.

Primary author

Danilo Silva De Albuquerque (University of Campinas UNICAMP (BR))

Presentation Materials