Spikes in ring-type events from ultra relativistic nuclear collisions

2008 ◽  
Vol 86 (7) ◽  
pp. 919-922 ◽  
Author(s):  
D Ghosh ◽  
A Deb ◽  
M B Lahiri ◽  
A Bhattacharya
Keyword(s):  
Refractive Index ◽  
Nuclear Matter ◽  
Gluon Radiation ◽  
Ring Type ◽  
Nuclear Collisions ◽  
Nuclear Interactions ◽  
Relativistic Nuclear Collisions

This paper reports the observation of some peculiar ring-like events in ultra relativistic nuclear interactions (the 32S–AgBr interaction at 200 A GeV and the 16O–AgBr interaction at 60 A GeV). These events have been analysed in the light of Čerenkov gluon radiation as proposed by Dremin. Also the value of the refractive index of the nuclear matter is calculated. The analysis shows values of refractive index different from that revealed in normal nuclear matter. PACS Nos.: 25.75.–q, 24.60.Ky, 12.40.Ee

ON A “MICROSCOPIC HUBBLE CONSTANT” FROM RELATIVISTIC NUCLEAR COLLISIONS

2007 ◽  
Vol 16 (07n08) ◽  
pp. 1790-1799 ◽  
Author(s):  
ALEXANDRU JIPA ◽  
CĂLIN BEŞLIU ◽  
ION SORIN ZGURĂ ◽  
OANA RISTEA ◽  
CĂTĂLIN RISTEA ◽  
...  
Keyword(s):  
Nuclear Matter ◽  
Temporal Evolution ◽  
Identical Particle ◽  
Hubble Constant ◽  
Big Bang ◽  
Nuclear Collisions ◽  
Particle Spectra ◽  
Relativistic Nuclear Collisions ◽  
The Universe ◽  
Universe Evolution

Similarities between cosmological scenarios on the Universe evolution after “Big Bang” and the behavior of the highly excited nuclear matter formed in relativistic nuclear collisions, immediately after collisions, are considered to do an estimation of a “microscopic Hubble parameter/constant” for the expansion rate in relativistic nuclear collisions, similar with the cosmological Hubble constant. Temporal connections between the evolution of the nuclear matter after impact and the scenarios on the Universe evolution after “Big Bang” are introduced. Experimental results on participants, fireball sizes (identical particle interferometry), densities, particle spectra and temperatures have been used. A “Hubble scale” for temporal evolution can be obtained. Satisfactory agreement with Buda-Lund model estimations has been obtained.

scholarly journals QCD equation of state at finite chemical potentials for relativistic nuclear collisions

2021 ◽  
Vol 36 (07) ◽  
pp. 2130007
Author(s):  
Akihiko Monnai ◽  
Björn Schenke ◽  
Chun Shen
Keyword(s):  
Equation Of State ◽  
Nuclear Matter ◽  
Lattice Qcd ◽  
Baryon Number ◽  
Nuclear Collisions ◽  
Chemical Potentials ◽  
Dense Nuclear Matter ◽  
Lower Beam ◽  
Quantitative Understanding ◽  
Relativistic Nuclear Collisions

We review the equation of state of QCD matter at finite densities. We discuss the construction of the equation of state with net baryon number, electric charge, and strangeness using the results of lattice QCD simulations and hadron resonance gas models. Its application to the hydrodynamic analyses of relativistic nuclear collisions suggests that the interplay of multiple conserved charges is important in the quantitative understanding of the dense nuclear matter created at lower beam energies. Several different models of the QCD equation of state are discussed for comparison.

scholarly journals Tachyons and Solitons in Spontaneous Symmetry Breaking in the Frame of Field Theory

Symmetry ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1358
Author(s):  
Yiannis Contoyiannis ◽  
Michael P. Hanias ◽  
Pericles Papadopoulos ◽  
Stavros G. Stavrinides ◽  
Myron Kampitakis ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Critical Point ◽  
Universality Class ◽  
Lattice Simulation ◽  
Ginzburg Landau ◽  
Spin Lattice ◽  
Nuclear Collisions ◽  
Ising Spin ◽  
Relativistic Nuclear Collisions

This paper presents our study of the presence of the unstable critical point in spontaneous symmetry breaking (SSB) in the framework of Ginzburg–Landau (G-L) free energy. Through a 3D Ising spin lattice simulation, we found a zone of hysteresis where the unstable critical point continued to exist, despite the system having entered the broken symmetry phase. Within the hysteresis zone, the presence of the kink–antikink SSB solitons expands and, therefore, these can be observed. In scalar field theories, such as Higgs fields, the mass of this soliton inside the hysteresis zone could behave as a tachyon mass, namely as an imaginary quantity. Due to the fact that groups Ζ(2) and SU(2) belong to the same universality class, one expects that, in future experiments of ultra-relativistic nuclear collisions, in addition to the expected bosons condensations, structures of tachyon fields could appear.

Spectra ofp,d, andtfrom relativistic nuclear collisions

1980 ◽  
Vol 21 (4) ◽  
pp. 1321-1343 ◽  
Author(s):  
A. Sandoval ◽  
H. H. Gutbrod ◽  
W. G. Meyer ◽  
R. Stock ◽  
Ch. Lukner ◽  
...  
Keyword(s):  
Nuclear Collisions ◽  
Relativistic Nuclear Collisions

scholarly journals Ultra-relativistic nuclear collisions: Event shape engineering

2013 ◽  
Vol 719 (4-5) ◽  
pp. 394-398 ◽  
Author(s):  
Jürgen Schukraft ◽  
Anthony Timmins ◽  
Sergei A. Voloshin
Keyword(s):  
Event Shape ◽  
Nuclear Collisions ◽  
Relativistic Nuclear Collisions

Pulsating blobs of quark matter in relativistic nuclear collisions

1980 ◽  
Vol 295 (4) ◽  
pp. 401-402 ◽  
Author(s):  
H. St�cker ◽  
G. Graebner ◽  
J. A. Maruhn ◽  
W. Greiner
Keyword(s):  
Quark Matter ◽  
Nuclear Collisions ◽  
Relativistic Nuclear Collisions
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