Results on open-charm production in pp, p-Pb and Pb-Pb collisions with ALICE at the LHC

31st Winter Workshop on Nuclear Dynamics

Meninno, E.^1

Via Giovanni Paolo II, 132, Fisciano (SA)

84084, Italy^1

关键词: Charged particle multiplicities;    Heavy ion collision;    High precision tracking;    Large ion collider experiments;    Measurement of particles;    Nuclear modification factors;    Open charm production;    Particle identifications;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/636/1/012003/pdf
DOI  :  10.1088/1742-6596/636/1/012003

来源: IOP

【 摘 要 】

ALICE (A Large Ion Collider Experiment) is designed to study the strongly-interacting medium created in heavy-ion collisions at LHC energies, the Quark-Gluon Plasma (QGP). Charm and beauty quarks are powerful probes to study the QGP in heavy-ion collisions: produced in hard partonic scattering processes on a short time scale, they are expected to traverse the QCD medium, interacting with its constituents and losing energy through radiative and collisional processes. In ALICE, open-charm production is studied through the reconstruction of the hadronic decays of D0, D+, D∗+and Ds+mesons at mid-rapidity. The high precision tracking, good vertexing capabilities and excellent particle identification offered by ALICE allow for the measurement of particles containing heavy quarks (particularly D mesons) in a wide transverse-momentum range in pp, p-Pb and Pb-Pb collisions. A review of the main results on D-meson production in pp collisions at √s= 7 TeV, Pb-Pb collisions at √sNN= 2.76 TeV and the most recent results in p-Pb collisions at √sNN= 5.02 TeV will be presented. In particular, the pT-differential yields and cross sections in the three collision systems, the nuclear modification factors RAAand RpPbin Pb-Pb and p-Pb collisions, and the elliptic flow in Pb-Pb collisions will be discussed. The D-meson yield in pp and p-Pb collisions will also be shown as a function of charged-particle multiplicity.