A selection of the very recent results by the Compact Muon Solenoid (CMS) Collaboration on heavy-ion physics in ultrarelativistic collisions at the LHC is presented in this paper.
An analysis is performed of recent results from studies of heavy-ion physics by the Compact Muon Solenoid (CMS) Collaboration at the Large Hadron Collider (CERN). Tests of quark–gluon plasma in the ...CMS detector provide valuable information about the behavior of matter under the extreme conditions of ultra high-energy nucleus–nucleus collisions.
The present article gives a brief account of some interesting results obtained most recently in studying heavy-ion physics—in particular, quark–gluon matter—with the Compact Muon Solenoid (CMS) ...detector at the Large Hadron Collider (LHC).
The LHC data on azimuthal anisotropy harmonics from PbPb collisions at center-of-mass energy 2.76 TeV per nucleon pair are analyzed and interpreted in the framework of the HYDJET++ model. The ...cross-talk of elliptic
v
2
and triangular
v
3
flow in the model generates both even and odd harmonics of higher order. Comparison with the experimental data shows that this mechanism is able to reproduce the
p
T
and centrality dependencies of quadrangular flow
v
4
, and also the basic trends for pentagonal
v
5
and hexagonal
v
6
flows.
The LHC data on event-by-event harmonic flow coefficients measured in PbPb collisions at center-of-mass energy 2.76 TeV per nucleon pair are analyzed and interpreted within the HYDJET
+
+
model. To ...compare the model results with the experimental data the unfolding procedure is employed. The essentially dynamical origin of the flow fluctuations in hydro-inspired freeze-out approach has been established. It is shown that the simple modification of the model via introducing the distribution over spatial anisotropy parameters permits HYDJET
+
+
to reproduce both elliptic and triangular flow fluctuations and related to it eccentricity fluctuations of the initial state at the LHC energy.
The HYDJET
event generator is a phenomenological model of heavy-ion collisions that treats the collision process as a combination of a soft hydro-type state and a hard state resulting from hard ...parton scattering. On the one hand, it allows one to quickly simulate relativistic heavy-ion collisions, and on the other hand, it reproduces and describes a number of experimental phenomena in the soft and hard sector. It also allows you to study many features of the interaction as interplay of soft and hard processes. Here we present some selected results of recent studies. Basically, new results on the correlation of elliptical flows at small and large transverse momenta at LHC energies are described. Current studies of the charge balance function at LHC energies and the
A
-dependence of the flow in heavy-ion collisions are also discussed.
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