scholarly journals Beam Energy Dependence of Hanbury-Brown-Twiss Radii from a Blast-Wave Model

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
S. Zhang ◽  
Y. G. Ma ◽  
J. H. Chen ◽  
C. Zhong
Keyword(s):  
Blast Wave ◽  
Energy Dependence ◽  
Beam Energy ◽  
Wave Model ◽  
Reverse Direction ◽  
Momentum Dependence ◽  
Correlation Lengths ◽  
200 Gev ◽  
Star Experiment ◽  
Scan Data

The beam energy dependence of correlation lengths (the Hanbury-Brown-Twiss radii) is calculated by using a blast-wave model and the results are comparable with those from RHIC-STAR beam energy scan data as well as the LHC-ALICE measurements. A set of parameters for the blast-wave model as a function of beam energy under study are obtained by fit to the HBT radii at each energy point. The transverse momentum dependence of HBT radii is presented with the extracted parameters for Au+Au collision at sNN = 200 GeV and for Pb+Pb collisions at 2.76 TeV. From our study one can learn that particle emission duration cannot be ignored while calculating the HBT radii with the same parameters. And tuning kinetic freeze-out temperature in a range will result in system lifetime changing in the reverse direction as it is found in RHIC-STAR experiment measurements.

scholarly journals Beam-energy dependence of identified two-particle angular correlations in sNN=7.7–200 GeV Au+Au collisions

2020 ◽  
Vol 101 (1) ◽  
Author(s):  
J. Adam ◽  
L. Adamczyk ◽  
J. R. Adams ◽  
J. K. Adkins ◽  
G. Agakishiev ◽  
...  
Keyword(s):  
Energy Dependence ◽  
Beam Energy ◽  
Angular Correlations ◽  
200 Gev

scholarly journals Kinetic freeze-out conditions in nuclear collisions with 2A–158A GeV beam energy within a non-boost-invariant blast-wave model

2018 ◽  
Vol 98 (2) ◽  
Author(s):  
Sudhir Pandurang Rode ◽  
Partha Pratim Bhaduri ◽  
Amaresh Jaiswal ◽  
Ankhi Roy
Keyword(s):  
Blast Wave ◽  
Beam Energy ◽  
Wave Model ◽  
Nuclear Collisions ◽  
Freeze Out

scholarly journals Kaon femtoscopy in Au+Au collisions at √SNN = 200 GeV at the STAR experiment

2018 ◽  
Vol 171 ◽  
pp. 16001
Author(s):  
Jindřich Lidrych
Keyword(s):  
Blast Wave ◽  
Collision Energy ◽  
Preliminary Results ◽  
200 Gev ◽  
Star Experiment ◽  
Freeze Out

In this proceedings, the STAR preliminary results on femtoscopic correlations of identical kaons from Au+Au collisions at [see formula in PDF] =200 GeV are presented. The measured kaon source radii are studied as a function of collision energy as well as centrality and transverse pair mass mT. In addition, extracted kaon blast-wave freeze-out parameters are presented.

Understanding of radial and elliptic expansion with quark number scaling and blast wave model in 200 GeV Au+Au at RHIC-PHENIX

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Yoshimasa Ikeda
Keyword(s):  
Blast Wave ◽  
Dense Matter ◽  
Wave Model ◽  
Azimuthal Anisotropy ◽  
Experimental Result ◽  
Quark Number ◽  
Initial Stage ◽  
Quark Coalescence ◽  
200 Gev ◽  
Quark Level

AbstractMeasurement of azimuthal anisotropy is one of the most important study because of its relation to the initial stage. Especially, the elliptical anisotropy which is measured as the second coefficient of Fourier expansion of particle azimuthal distribution is believed to carry the information about the initial geometrical anisotropy. It seems the identified hadron v 2 depends on the number of quark contents of the hadron. The experimental result of quark number scaling of v 2 suggests quark level collectivity in the hot dense matter and quark coalescence mechanism to form hadron from quark matter via quark-gluon phase transition. The measured v 2 and p T spectra are analyzed with various assumptions based on the blast wave model in order to understand the freeze-out temperature and collective flow after the system expansion.

Event-by-event hadron ratio fluctuations from Au+Au collisions at RHIC-STAR

Open Physics ◽  
2012 ◽  
Vol 10 (6) ◽  
Author(s):  
Jian Tian
Keyword(s):  
Pair Production ◽  
Energy Dependence ◽  
Beam Energy ◽  
Central Collisions ◽  
Hadron Multiplicity ◽  
200 Gev ◽  
Dynamical Fluctuations ◽  
Star Detector

AbstractWe present measurements of event-by-event fluctuations on hadron multiplicity ratios (K/π, p/π, K/p) in Au+Au collisions at $\sqrt {s_{NN} } $ and 200 GeV using the STAR detector at RHIC. The magnitude of dynamical fluctuations σ dyn for p/π and K/p ratios change smoothly from a large negative value at 7.7 GeV to a smaller negative value at 200 GeV while that for the K/π ratios exhibits no significant beam energy dependence. The dynamical fluctuations related to pair production σ dynpair dyn for the p/K, K/p, K −/K + and p/p ratios at 200 GeV all exhibit a maximum at the mid-central collisions and decrease at the most peripheral and most central collisions.

scholarly journals Beam energy dependence of net- Λ fluctuations measured by the STAR experiment at the BNL Relativistic Heavy Ion Collider

2020 ◽  
Vol 102 (2) ◽  
Author(s):  
J. Adam ◽  
L. Adamczyk ◽  
J. R. Adams ◽  
J. K. Adkins ◽  
G. Agakishiev ◽  
...  
Keyword(s):  
Energy Dependence ◽  
Beam Energy ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collider ◽  
Star Experiment

scholarly journals Analyzing Transverse Momentum Spectra of Pions, Kaons and Protons in p–p, p–A and A–A Collisions via the Blast-Wave Model with Fluctuations

Entropy ◽  
2021 ◽  
Vol 23 (7) ◽  
pp. 803
Author(s):  
Hai-Ling Lao ◽  
Fu-Hu Liu ◽  
Bo-Qiang Ma
Keyword(s):  
Transverse Momentum ◽  
Flow Velocity ◽  
Blast Wave ◽  
Proper Time ◽  
Wave Model ◽  
Transverse Flow ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Transverse Flow Velocity ◽  
Freeze Out

The transverse momentum spectra of different types of particles, π±, K±, p and p¯, produced at mid-(pseudo)rapidity in different centrality lead–lead (Pb–Pb) collisions at 2.76 TeV; proton–lead (p–Pb) collisions at 5.02 TeV; xenon–xenon (Xe–Xe) collisions at 5.44 TeV; and proton–proton (p–p) collisions at 0.9, 2.76, 5.02, 7 and 13 TeV, were analyzed by the blast-wave model with fluctuations. With the experimental data measured by the ALICE and CMS Collaborations at the Large Hadron Collider (LHC), the kinetic freeze-out temperature, transverse flow velocity and proper time were extracted from fitting the transverse momentum spectra. In nucleus–nucleus (A–A) and proton–nucleus (p–A) collisions, the three parameters decrease with the decrease of event centrality from central to peripheral, indicating higher degrees of excitation, quicker expansion velocities and longer evolution times for central collisions. In p–p collisions, the kinetic freeze-out temperature is nearly invariant with the increase of energy, though the transverse flow velocity and proper time increase slightly, in the considered energy range.

Sign in / Sign up

Export Citation Format

Share Document