EPS HEP 2015

22-29 July 2015
Europe/Vienna timezone

Hadronic resonances as probes of the fireball evolution in heavy-ion collisions at the LHC

23 Jul 2015, 17:30
20m
HS42 ()

HS42

talk Heavy Ion Physics

Speaker

Dr Enrico Fragiacomo (INFN, Trieste (IT))

Description

Hadronic resonances provide valuable observables for the properties of the hot and dense hadronic phase of the fireball created in heavy-ion collisions, since their lifetimes, of the order of few fm/c, are comparable to the time span between the chemical and kinetic freeze-outs, which characterize the latest stage of the fireball evolution. Re-scattering of decay products and regeneration via pseudo-elastic hadron scattering can alter their yields from the values that would be measured in elementary (pp) collisions and those that would be expected from statistical particle-production models. The relative strengths of re-scattering and regeneration, as well as the temperature and lifetime of the hadronic phase, can be studied through measurements of resonance yields and their ratios to the yields of long-lived hadrons. An overview of recent results on resonance production from the ALICE experiment is presented for pp, p-Pb, and Pb-Pb collisions and compared with results at lower energy from the STAR experiment and with statistical model predictions.

Primary author

Dr Enrico Fragiacomo (INFN, Trieste (IT))