Speaker
Mr
Frederick Kramer
(IKF Uni Frankfurt)
Description
ALICE is the dedicated heavy-ion physics experiment at the Large Hadron Collider (LHC). It is designed to provide excellent capabilities to study the Quark-Gluon Plasma (QGP), the deconfined state of strongly-interacting matter, in the highest energy density regime opened up by the LHC. Quarkonia, bound states of heavy (charm or bottom) quarks such as the J/ψ, are crucial probes of the QGP in A-A collisions. High-precision data from p-p collisions are an essential baseline for measurements in A-A, and moreover, serve as a crucial test for competing models of quarkonium hadroproduction.
ALICE measures quarkonia down to pt = 0 via their decay channels into e+e− in the central barrel detectors (|y| < 0.9) and into μ+μ− in the muon spectrometer (2.5 < y < 4.0).
We will present first results on the transverse momentum and rapidity distributions of the inclusive J/ψ production cross section in p-p collisions. The polarisation of J/ψ and the dependence of the J/ψ yield on the charged particle multiplicity in √s = 7 TeV p-p collisions will be discussed. Finally, results on the inclusive J/ψ production in √sNN = 2.76 TeV Pb-Pb collisions, the nuclear modification factor RAA and the central-to-peripheral modification factor RCP will be shown.
Primary author
Mr
Frederick Kramer
(IKF Uni Frankfurt)
