Hadronic resonance production in pp and Pb_Pb collisions at LHC with the ALICE experiment

International Workshop on Discovery Physics at the LHC 2012

Badalá, A.^1 ; Oeschler, H.^2

INFN-Sezione di Catania, V. S. Sofia 64, I95125, Catania, Italy^1

Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany^2

关键词: Hadronic interactions;    Heavy-ion data;    Measurements of;    Particle production;    Pb-Pb collisions;    Pp collisions;    Resonance production;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/455/1/012003/pdf
DOI  :  10.1088/1742-6596/455/1/012003

来源: IOP

【 摘 要 】

Resonances, with their lifetimes comparable to that of the fireball, can be used to estimate the time span and hadronic interaction cross section in the phase between chemical and kinetic freeze-out. In pp collisions, measurements of resonances provide an important baseline for heavy-ion data and allow for the tuning of QCD-inspired particle production models. The ALICE collaboration measured K*(892)0 and ø(1020) production, both in pp collisions at √ps=7 TeV and in Pb collisions at √sNN=2.76 TeV. The inelastic yield of σ(1385)±in pp collision at ps=7 TeV was also measured. Transverse momentum spectra, ratios to stable particles and a comparison between central and peripheral production are shown.