scholarly journals Dilepton emission from heavy-ion collision of Quark-Gluon Plasma

2015 ◽  
Author(s):  
Shougaijam Somorendro Singh
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Heavy Ion Collision ◽  
Ion Collision

Study and Investigation of Hard Photons Emission in Heavy Ion Collisions

2021 ◽  
Vol 19 (2) ◽  
pp. 61-65
Author(s):  
Taghreed A. Younis ◽  
Hadi J.M. Al-Agealy
Keyword(s):  
Critical Temperature ◽  
Quark Gluon Plasma ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Heavy Ion Collision ◽  
Hard Photon ◽  
Ion Collisions ◽  
Strength Models ◽  
Ion Collision

This work involves hard photon rate production from quark -gluon plasma QGP interaction in heavy ion collision. Using a quantum chromodynamic model to investigate and calculation of photons rate in 𝑐𝑔 → 𝑠𝑔𝛾 system due to strength coupling, photons rate, temperature of system, flavor number and critical. The photons rate production computed using the perturbative strength models for QGP interactions. The strength coupling was function of temperature of system, flavor number and critical temperature. Its influenced by force with temperature of system, its increased with decreased the temperature and vice versa. The strength coupling has used to examine the confinement and deconfinement of quarks in QGP properties and influence on the photon rate production. In our approach, we calculate the photons rate depending on the strength coupling, photons rate and temperature of system with other factors. The results plotted as a function of the photons energy. The photons rate was decreased with increased temperature and increased with decreased with strength coupling.

scholarly journals OBSERVING QUARK-GLUON PLASMA WITH STRANGE HADRONS

2000 ◽  
Vol 09 (02) ◽  
pp. 107-147 ◽  
Author(s):  
JEAN LETESSIER ◽  
JOHANN RAFELSKI
Keyword(s):  
Quark Gluon Plasma ◽  
Beam Energy ◽  
Particle Production ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Hadron Production ◽  
Dynamical Theory ◽  
Heavy Ion Collision ◽  
Strange Hadron ◽  
Ion Collision

We review the methods and results obtained in an analysis of the experimental heavy ion collision research program at nuclear beam energy of 160–200 A GeV. We study strange, and more generally, hadronic particle production experimental data. We discuss present expectations concerning how these observables will perform at other collision energies. We also present the dynamical theory of strangeness production and apply it to show that it agrees with available experimental results. We describe strange hadron production from the baryon-poor quark-gluon phase formed at much higher reaction energies, where the abundance of strange baryons and antibaryons exceeds that of nonstrange baryons and antibaryons.

Dilepton production rate calculation using MEQM in heavy-ion collision

2020 ◽  
Vol 35 (21) ◽  
pp. 2050115
Author(s):  
P. K. Sethy ◽  
Yogesh Kumar ◽  
S. Somorendro Singh
Keyword(s):  
Magnetic Field ◽  
Quark Gluon Plasma ◽  
Chemical Potential ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Heavy Ion Collision ◽  
Rate Calculation ◽  
Ion Collision ◽  
The Impact ◽  
The Magnetic Field

It is established that a strong magnetic field is generated along with quark–gluon plasma in heavy-ion collision. This unique scenario offers an opportunity to study and analyze the impact of the magnetic field on the evolution of the plasma. We calculate the dilepton yield from quark–gluon plasma in a magnetic environment by considering a suitably modified magnetized effective quark mass (MEQM). Further, we study the dilepton yield for different values of magnetic field and different values of chemical potential with MEQM. The results obtained are very encouraging and we compare it with recently reported theoretical results.

scholarly journals Electromagnetic Radiations from Heavy Ion Collision

2013 ◽  
Vol 2013 ◽  
pp. 1-41 ◽  
Author(s):  
Payal Mohanty ◽  
Sabyasachi Ghosh ◽  
Sukanya Mitra
Keyword(s):  
Invariant Mass ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Thermal Bath ◽  
Heavy Ion Collision ◽  
Lepton Pairs ◽  
Light Vector ◽  
Nonmonotonic Variation ◽  
The Individual ◽  
Ion Collision

In this review, we have discussed the different sources of photons and dileptons produced in heavy ion collision (HIC). The transverse momentum (pT) spectra of photons for different collision energies are analyzed with a view of extracting the thermal properties of the system formed in HIC. We showed the effect of viscosity onpTspectra of produced thermal photons. The dilepton productions from hot hadrons are considered including the spectral change of light vector mesons in the thermal bath. We have analyzed thepTand invariant mass (M) spectra of dileptons for different collision energies too. As the individual spectra are constrained by certain unambiguous hydrodynamical inputs, so we evaluated the ratio of photon to dilepton spectra,Rem, to overcome those quantities. We argue that the variation of the radial velocity extracted fromRemwithMis indicative of a phase transition from the initially produced partons to hadrons. In the calculations of interferometry involving dilepton pairs, it is argued that the nonmonotonic variation of HBT radii with invariant mass of the lepton pairs signals the formation of quark gluon plasma in HIC. Elliptic flow (v2) of dilepton is also studied atsNN=2.76 TeV for 30–40% centrality using the(2+1)dhydrodynamical model.

scholarly journals Quark–gluon plasma and topological quantum field theory

2017 ◽  
Vol 32 (10) ◽  
pp. 1750056
Author(s):  
M. J. Luo
Keyword(s):  
Field Theory ◽  
Critical Temperature ◽  
Quark Gluon Plasma ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Effective Field ◽  
Relativistic Heavy Ion Collision ◽  
Topological Quantum ◽  
Ion Collision ◽  
Ordered State

Based on an analogy with topologically ordered new state of matter in condensed matter systems, we propose a low energy effective field theory for a parity conserving liquid-like quark–gluon plasma (QGP) around critical temperature in quantum chromodynamics (QCD) system. It shows that below a QCD gap which is expected several times of the critical temperature, the QGP behaves like topological fluid. Many exotic phenomena of QGP near the critical temperature discovered at Relativistic Heavy Ion Collision (RHIC) are more readily understood by the suggestion that QGP is a topologically ordered state.

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.

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