scholarly journals On the Quantum Nature of a Fireball Created in Ultrarelativistic Nuclear Collisions

2021 ◽  
Author(s):  
Valeriy Kizka
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ions ◽  
Collision Energy ◽  
Gluon Plasma ◽  
Quantum States ◽  
Quantum Object ◽  
Basic Principles ◽  
Nuclear Collisions ◽  
Object Based ◽  
The Difference

In the article, the fireball formed in the collision of relativistic nuclei is considered as a quantum object. Based on this, an attempt is made to explain the difference in the measurements of hyperon yields in the two experiments - NA49 and NA57. Using the basic principles of quantum mechanics, it was shown that a fireball can have two quantum states - with and without ignited Quark-Gluon Plasma (QGP). With an increase of the collision energy of heavy ions, the probability of QGP ignition increases. At the same time, the probability of the formation of a fireball without igniting the QGP also remains not zero.

scholarly journals The First Moment of Azimuthal Anisotropy in Nuclear Collisions from AGS to LHC Energies

2016 ◽  
Vol 2016 ◽  
pp. 1-16 ◽  
Author(s):  
Subhash Singha ◽  
Prashanth Shanmuganathan ◽  
Declan Keane
Keyword(s):  
Quark Gluon Plasma ◽  
Charged Particles ◽  
Theoretical Work ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Azimuthal Anisotropy ◽  
Flow Focusing ◽  
Nuclear Collisions ◽  
Ion Collisions ◽  
First Moment

We review topics related to the first moment of azimuthal anisotropy (v1), commonly known as directed flow, focusing on both charged particles and identified particles from heavy-ion collisions. Beam energies from the highest available, at the CERN LHC, down to projectile kinetic energies per nucleon of a few GeV per nucleon, as studied in experiments at the Brookhaven AGS, fall within our scope. We focus on experimental measurements and on theoretical work where direct comparisons with experiment have been emphasized. The physics addressed or potentially addressed by this review topic includes the study of Quark Gluon Plasma and, more generally, investigation of the Quantum Chromodynamics phase diagram and the equation of state describing the accessible phases.

THERMAL RADIATION FROM AN EVOLVING VISCOUS QUARK GLUON PLASMA

2013 ◽  
Vol 22 (01) ◽  
pp. 1350004 ◽  
Author(s):  
SUKANYA MITRA ◽  
PAYAL MOHANTY ◽  
SOURAV SARKAR ◽  
JAN-E ALAM
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Viscous Effects ◽  
Relativistic Heavy Ion Collider ◽  
Nuclear Collisions ◽  
Evolution Dynamics ◽  
Small Change ◽  
Photon Spectra ◽  
Space Time Evolution

The effects of viscosity on the space-time evolution of quark gluon plasma produced in nuclear collisions at relativistic heavy ion collider energies have been studied. The entropy generated due to the viscous motion of the fluid has been taken into account in constraining the initial temperature by the final multiplicity (measured at the freeze-out point). The viscous effects on the photon spectra has been introduced consistently through the evolution dynamics and phase space factors of all the participating partons/hadrons in the production process. In contrast to some of the recent calculations the present work includes the contribution from the hadronic phase. A small change in the transverse momentum (pT) distribution of photons is observed due to viscous effects.

High Energy Nuclear Collisions and Quark Gluon Plasma

1992 ◽  
Author(s):  
Minoru Biyajima ◽  
Hideto Enyo ◽  
Teiji Kunihiro ◽  
Osamu Miyamura
Keyword(s):  
Quark Gluon Plasma ◽  
Gluon Plasma ◽  
High Energy ◽  
Nuclear Collisions
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