scholarly journals On Dynamical Net-Charge Fluctuations within a Hadron Resonance Gas Approach

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Abdel Nasser Tawfik ◽  
L. I. Abou-Salem ◽  
Asmaa G. Shalaby ◽  
M. Hanafy
Keyword(s):  
Strong Interactions ◽  
Proton Synchrotron ◽  
Super Proton Synchrotron ◽  
Net Charge ◽  
Charge Fluctuations ◽  
Particle Ratios ◽  
Strange Particles ◽  
Heavy Resonances ◽  
Beam Energy Scan ◽  
Na49 Experiment

The dynamical net-charge fluctuations (νdyn) in different particle ratiosK/π,K/p, andp/πare calculated from the hadron resonance gas (HRG) model and compared with STAR central Au+Au collisions atsNN=7.7–200 GeV and NA49 central Pb+Pb collisions atsNN=6.3–17.3 GeV. The three charged particle ratios (K/π,K/p, andp/π) are determined as total and average of opposite and average of the same charges. We find an excellent agreement between the HRG calculations and the experimental measurements, especially from STAR beam energy scan (BES) program, while the strange particles in the NA49 experiment at lower Super Proton Synchrotron (SPS) energies are not reproduced by the HRG approach. We conclude that the utilized HRG version seems to take into consideration various types of correlations including strong interactions through the heavy resonances and their decays especially at BES energies.

scholarly journals Experimental Results on Charge Fluctuations in Heavy-Ion Collisions

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
D. K. Mishra ◽  
P. Garg ◽  
P. K. Netrakanti ◽  
L. M. Pant ◽  
A. K. Mohanty
Keyword(s):  
Electric Charge ◽  
Heavy Ion Collisions ◽  
Collision Energy ◽  
Heavy Ion ◽  
Experimental Results ◽  
Higher Moments ◽  
Net Charge ◽  
Charge Fluctuations ◽  
Ion Collisions ◽  
Particle Ratios

We present a subset of experimental results on charge fluctuation from the heavy-ion collisions to search for phase transition and location of critical point in the QCD phase diagram. Measurements from the heavy-ion experiments at the SPS and RHIC energies observe that total charge fluctuations increase from central to peripheral collisions. The net-charge fluctuations in terms of dynamical fluctuation measure ν(+-,dyn) are studied as a function of collision energy (sNN) and centrality of the collisions. The product of ν(+-,dyn) and 〈Nch〉 shows a monotonic decrease with collision energies, which indicates that at LHC energy the fluctuations have their origin in the QGP phase. The fluctuations in terms of higher moments of net-proton, net-electric charge, and net-kaon have been measured for various sNN. Deviations are observed in both Sσ and κσ2 for net-proton multiplicity distributions from the Skellam and hadron resonance gas model for sNN<39 GeV. Higher moment results of the net-electric charge and net-kaon do not observe any significant nonmonotonic behavior as a function of collision energy. We also discuss the extraction of the freeze-out parameters using particle ratios and experimentally measured higher moments of net-charge fluctuations. The extracted freeze-out parameters from experimentally measured moments and lattice calculations are found to be in agreement with the results obtained from the fit of particle ratios to the thermal model calculations.

scholarly journals Latest Results from the NA61/SHINE Experiment

KnE Energy ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 188 ◽  
Author(s):  
D T Larsen
Keyword(s):  
Critical Point ◽  
Energy Dependence ◽  
System Size ◽  
Beam Momentum ◽  
Strong Interactions ◽  
Proton Synchrotron ◽  
Momentum Range ◽  
Super Proton Synchrotron ◽  
Hadron Spectra ◽  
Onset Of Deconfinement

The NA61/SHINE experiment at the CERN Super Proton Synchrotron is pursuing a rich programme on strong interactions, which covers the study of the onset of deconfinement and aims to discover the critical point of strongly interacting matter by performing an energy and system-size scan over the full CERN SPS beam momentum range. So far the scans of p+p, p+Pb, Be+Be, and Ar+Sc interactions have been completed, samples of Pb+Pb data at three energies have already been taken and Xe+La collisions will be registered this year. Results from the different reactions are now emerging, in particular the energy dependence of hadron spectra and yields as well as fluctuations. This contribution presents status and preliminary results from this effort, as well as an outlook for future extensions of the strong interactions programme.

scholarly journals Contributions of Jets in Net Charge Fluctuations from the Beam Energy Scan at RHIC and LHC

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Bushra Ali ◽  
Shaista Khan ◽  
Shakeel Ahmad
Keyword(s):  
Beam Energy ◽  
Model Simulation ◽  
Monte Carlo Model ◽  
Heavy Ion ◽  
Nucleon Nucleon ◽  
Jet Quenching ◽  
Net Charge ◽  
Charge Fluctuations ◽  
Ion Collisions ◽  
Beam Energy Scan

Dynamical net charge fluctuations have been studied in ultrarelativistic heavy-ion collisions from the beam energy scan at RHIC and LHC energies by carrying out the hadronic model simulation. Monte Carlo model, HIJING, is used to generate events in two different modes, HIJING-default with jet quenching switched off and jet/minijet production switched off. A popular variable, ν[+-,dyn], is used to study the net charge fluctuations in different centrality bins and the findings are compared with the available experimental values reported earlier. Although the broad features of net charge fluctuations are reproduced by the HIJING, the model predicts the larger magnitude of fluctuations as compared to the one observed in experiments. The role of jets/minijets production in reducing the net charge fluctuations is, however, distinctly visible from the analysis of the two types of HIJING events. Furthermore, dNch/dη and 1/N scaling is partially exhibited, which is due to the fact that, in HIJING, nucleus-nucleus collisions are treated as multiple independent nucleon-nucleon collisions.

scholarly journals Particle Production at CBM Energies in a Thermal Model Approach

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
A. Prakash ◽  
P. K. Srivastava ◽  
B. K. Singh
Keyword(s):  
Particle Production ◽  
Center Of Mass ◽  
Baryon Density ◽  
Proton Synchrotron ◽  
Super Proton Synchrotron ◽  
Strongly Interacting ◽  
Particle Ratios ◽  
Main Emphasis ◽  
Total Multiplicity ◽  
Density Regime

The compressed baryonic matter (CBM) experiment planned at the Facility for Antiproton and Ion Research (FAIR) will provide a major scientific effort for exploring the properties of strongly interacting matter in the high baryon density regime. One of the important goals behind such experiment is to precisely determine the equation of state (EOS) for the strongly interacting matter at extremely large baryon density. In this paper, we have used some successful models for RHIC and LHC energies to predict different particle ratios and the total multiplicity of various hadrons in the CBM energy range, that is, from 10 A GeV to 40 A GeV lab energies, which corresponds to 4.43 A GeV and 8.71 A GeV center-of-mass energies. Our main emphasis is to estimate the strange particles enhancement as well as an increase in the net baryon density at CBM experiment. We have also compared the model results with the experimental data obtained at alternating gradient synchrotron (AGS) and super proton synchrotron (SPS).

scholarly journals Net charge fluctuations inAu+Aucollisions atsNN=130GeV

2003 ◽  
Vol 68 (4) ◽  
Author(s):  
J. Adams ◽  
C. Adler ◽  
M. M. Aggarwal ◽  
Z. Ahammed ◽  
J. Amonett ◽  
...  
Keyword(s):  
Net Charge ◽  
Charge Fluctuations
Sign in / Sign up

Export Citation Format

Share Document