scholarly journals Work distribution of an expanding gas and transverse energy production in relativistic heavy ion collisions

2014 ◽  
Vol 732 ◽  
pp. 49-54
Author(s):  
Bin Zhang ◽  
Jay P. Mayfield
Keyword(s):  
Heavy Ion Collisions ◽  
Energy Production ◽  
Transverse Energy ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Work Distribution

DYNAMICAL CALCULATION OF CENTRAL ENERGY DENSITIES IN RELATIVISTIC HEAVY-ION COLLISIONS

1993 ◽  
Vol 02 (03) ◽  
pp. 565-573 ◽  
Author(s):  
D.J. DEAN ◽  
A.S. UMAR ◽  
M.R. STRAYER
Keyword(s):  
Heavy Ion Collisions ◽  
Transverse Energy ◽  
Parton Model ◽  
Heavy Ion ◽  
Maximum Energy ◽  
Relativistic Heavy Ion Collisions ◽  
Energy Distributions ◽  
Ion Collisions ◽  
Dynamical Calculation ◽  
Central Energy

The 3+1 dimensional string-parton model is used to calculate energy densities and temperatures of produced mesons during relativistic heavy-ion collisions. We compare maximum energy densities with the experimental estimates obtained from the Bjørken formula. Although the string-parton model reproduces transverse energy distributions, dET/dη, the dynamical energy densities of the produced mesons are three to four times smaller than estimates based on the Bjørken formula with a formation time of 1 fm/c. We discuss various time scales which contribute to this discrepancy and suggest a modified interpretation of the Bjørken formula.

scholarly journals Charged Particle, Photon Multiplicity, and Transverse Energy Production in High-Energy Heavy-Ion Collisions

2015 ◽  
Vol 2015 ◽  
pp. 1-30 ◽  
Author(s):  
Raghunath Sahoo ◽  
Aditya Nath Mishra ◽  
Nirbhay K. Behera ◽  
Basanta K. Nandi
Keyword(s):  
Charged Particle ◽  
Heavy Ion Collisions ◽  
Energy Production ◽  
Transverse Energy ◽  
Charged Particles ◽  
Heavy Ion ◽  
High Energy ◽  
Initial Energy ◽  
Ion Collisions ◽  
Limiting Fragmentation

We review the charged particle and photon multiplicities and transverse energy production in heavy-ion collisions starting from few GeV to TeV energies. The experimental results of pseudorapidity distribution of charged particles and photons at different collision energies and centralities are discussed. We also discuss the hypothesis of limiting fragmentation and expansion dynamics using the Landau hydrodynamics and the underlying physics. Meanwhile, we present the estimation of initial energy density multiplied with formation time as a function of different collision energies and centralities. In the end, the transverse energy per charged particle in connection with the chemical freeze-out criteria is discussed. We invoke various models and phenomenological arguments to interpret and characterize the fireball created in heavy-ion collisions. This review overall provides a scope to understand the heavy-ion collision data and a possible formation of a deconfined phase of partons via the global observables like charged particles, photons, and the transverse energy measurement.

scholarly journals ANALYZING FLOW ANISOTROPIES WITH EXCURSION SETS IN RELATIVISTIC HEAVY-ION COLLISIONS

2012 ◽  
Vol 27 (29) ◽  
pp. 1250168 ◽  
Author(s):  
RANJITA K. MOHAPATRA ◽  
P. S. SAUMIA ◽  
AJIT M. SRIVASTAVA
Keyword(s):  
Heavy Ion Collisions ◽  
Transverse Energy ◽  
Azimuthal Angle ◽  
Threshold Value ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Excursion Sets ◽  
Ion Collisions ◽  
Anisotropic Expansion ◽  
History Of

We show that flow anisotropies in relativistic heavy-ion collisions can be analyzed using a certain technique of shape analysis of excursion sets recently proposed by us for CMBR fluctuations to investigate anisotropic expansion history of the universe. The technique analyzes shapes (sizes) of patches above (below) certain threshold value for transverse energy/particle number (the excursion sets) as a function of the azimuthal angle and rapidity. Modeling flow by imparting extra anisotropic momentum to the momentum distribution of particles from HIJING, we compare the resulting distributions for excursion sets at two different azimuthal angles. Angles with maximum difference in the two distributions identify the event plane, and the magnitude of difference in the two distributions relates to the magnitude of momentum anisotropy, i.e. elliptic flow.

Sign in / Sign up

Export Citation Format

Share Document