Abstract
The main goal of the heavy ion physics programs at high energy colliders is to produce hot and dense partonic matter for studying quantum chromodynamics (QCD) under extreme conditions. The Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) can measure various soft and hard probes with high accuracy. We present various unique features of the CMS detector as they relate to the exploration of high density QCD in heavy ion collisions.
Highlights
In the Standard Model, quantum chromodynamics (QCD) is well formulated in the perturbative regime in a vacuum, but its characteristics at finite density and temperature are largely unknown
We summarize the expected performance of the Compact Muon Solenoid (CMS) detector for Pb+Pb collisions at the Large Hadron Collider (LHC) [1]
We discuss the charged hadron multiplicity, the low-pT inclusive hadron spectra, and the elliptic flow, which describe the collective properties of the matter
Summary
In the Standard Model, quantum chromodynamics (QCD) is well formulated in the perturbative regime in a vacuum, but its characteristics at finite density and temperature are largely unknown. The ongoing relativistic heavy ion collision experiments at hadron colliders are expected to provide the key to these questions. Experiments at the relativistic heavy ion collider (RHIC) revealed several interesting phenomena such as jet quenching, constituent quark number scaling of the elliptic flow parameter (v2), and the modified shape of a jet in a medium. At LHC energy, the cross sections for hard processes will be larger than those at the RHIC by several orders of magnitude, which will enable us to precisely characterize high density QCD matter. We discuss the charged hadron multiplicity, the low-pT inclusive hadron spectra, and the elliptic flow, which describe the collective properties of the matter. We discuss the high pT charged hadron spectra and jets, γ-jet correlation, and quarkonium production, which describe the tomography of the matter at the highest density
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