scholarly journals Multiplicities andpTspectra in ultrarelativistic heavy ion collisions from a next-to-leading order improved perturbative QCD+saturation+hydrodynamics model

2013 ◽  
Vol 87 (4) ◽  
Author(s):  
R. Paatelainen ◽  
K. J. Eskola ◽  
H. Holopainen ◽  
K. Tuominen
Keyword(s):  
Perturbative Qcd ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Leading Order ◽  
Ion Collisions ◽  
Ultrarelativistic Heavy Ion Collisions

scholarly journals ON ANGULAR ORDERING IN MEDIUM-INDUCED RADIATION

2011 ◽  
Vol 20 (07) ◽  
pp. 1600-1604
Author(s):  
KONRAD TYWONIUK
Keyword(s):  
Perturbative Qcd ◽  
First Principles ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Differential Spectrum ◽  
Opening Angle ◽  
Gluon Emission ◽  
Collinear Singularity ◽  
Ion Collisions ◽  
Jet Observables

As an attempt to understand color coherence effects in medium from first principles, we calculate the double differential spectrum of medium-induced gluon emission off a quark–antiquark antenna in the framework of perturbative QCD. Within this setup we find a soft singularity, analogous to the vacuum spectrum, yet, as opposed to the vacuum, the collinear singularity is regulated by the pair opening angle, leading to a strict anti-angular ordering. We comment on the possible consequences of this new contribution for reconstructed jet observables in heavy-ion collisions.

scholarly journals Hadronic dissipative effects on elliptic flow in ultrarelativistic heavy-ion collisions

2006 ◽  
Vol 636 (6) ◽  
pp. 299-304 ◽  
Author(s):  
Tetsufumi Hirano ◽  
Ulrich Heinz ◽  
Dmitri Kharzeev ◽  
Roy Lacey ◽  
Yasushi Nara
Keyword(s):  
Heavy Ion Collisions ◽  
Elliptic Flow ◽  
Heavy Ion ◽  
Ion Collisions ◽  
Dissipative Effects ◽  
Ultrarelativistic Heavy Ion Collisions

scholarly journals Particle Production in Ultrarelativistic Heavy-Ion Collisions: A Statistical-Thermal Model Review

2013 ◽  
Vol 2013 ◽  
pp. 1-27 ◽  
Author(s):  
S. K. Tiwari ◽  
C. P. Singh
Keyword(s):  
Thermal Model ◽  
Heavy Ion Collisions ◽  
Particle Production ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Transverse Mass ◽  
Current Status ◽  
Thermal Models ◽  
Ion Collisions ◽  
Ultrarelativistic Heavy Ion Collisions

The current status of various thermal and statistical descriptions of particle production in the ultrarelativistic heavy-ion collisions experiments is presented in detail. We discuss the formulation of various types of thermal models of a hot and dense hadron gas (HG) and the methods incorporated in the implementing of the interactions between hadrons. It includes our new excluded-volume model which is thermodynamically consistent. The results of the above models together with the experimental results for various ratios of the produced hadrons are compared. We derive some new universal conditions emerging at the chemical freeze-out of HG fireball showing independence with respect to the energy as well as the structure of the nuclei used in the collision. Further, we calculate various transport properties of HG such as the ratio of shear viscosity-to-entropy using our thermal model and compare with the results of other models. We also show the rapidity as well as transverse mass spectra of various hadrons in the thermal HG model in order to outline the presence of flow in the fluid formed in the collision. The purpose of this review article is to organize and summarize the experimental data obtained in various experiments with heavy-ion collisions and then to examine and analyze them using thermal models so that a firm conclusion regarding the formation of quark-gluon plasma (QGP) can be obtained.

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