Hadronic resonances at ALICE

Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus–Nucleus Collisions 2012

Knospe, A.G.^1

Department of Physics, University of Texas at Austin, 1 University Station C1600, Austin, TX 78712-0264, United States^1

关键词: Chiral symmetry restoration;    Heavy ion collision;    High energy heavy-ion collision;    Measurements of;    Particle production;    Pb-Pb collisions;    Proton proton collisions;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/446/1/012056/pdf
DOI  :  10.1088/1742-6596/446/1/012056

来源: IOP

【 摘 要 】

Measurements of the ratios of hadronic resonance yields to non-resonance yields can be used to study the properties of the hadronic phase of high-energy heavy-ion collisions. A change in resonance masses or widths could be an indication of chiral symmetry restoration. Measurements of resonances in proton-proton collisions provide an important baseline for measurements in heavy-ion collisions as well as data for tuning QCD-inspired particle production models. The ALICE collaboration has measured the K*(892)0and φ(1020) resonances in Pb-Pb collisions at 2.76 TeV and the K*(892)0, φ(1020), and Σ*(1385)±resonances in pp collisions at 7 TeV. These measurements-including transverse momentum spectra, ratios to non-resonances, masses, and widths-are discussed and compared to theoretical predictions.