Identified charged hadron production in Pb-Pb collisions with event shape engineering

Hot Quarks 2014: Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions

Tangaro, Marco Antonio^1

Dipartimento Interateneo di Fisica M. Merlin, Sezione INFN, Via Orabona 4, Bari

70126, Italy^1

关键词: Azimuthal distributions;    Center-of-mass energies;    Engineering techniques;    Heavy ion collision;    Identified particle spectra;    Pb-Pb collisions;    Strong correlation;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/612/1/012053/pdf
DOI  :  10.1088/1742-6596/612/1/012053

来源: IOP

【 摘 要 】

The Event Shape Engineering technique allows the selection of different event shapes for a definite centrality and colliding system. The event selection is based on the azimuthal distribution of produced particles, using the so-called flow vector. For such shape selected events, the elliptic flow coefficient (v2) is significantly different with respect to the unbiased events. Moreover, recent Monte-Carlo studies show a strong correlation between the (final state) event shape selection and the (initial state) eccentricity of the collision. This opens the opportunity to characterize events according to the initial geometry. An approach to select the eccentricity of the event with the Event Shape Engineering is presented. Then the effect of this selection on identified particle spectra, mean transverse momentum and v2of charged particles in heavy-ion collisions at √sNN= 2.76 TeV center-of-mass energy is discussed.