ANISOTROPIC FLOWS OF NUCLEAR CLUSTERS AND HARD PHOTONS IN INTERMEDIATE ENERGY HEAVY ION COLLISIONS

2008 ◽  
Vol 17 (09) ◽  
pp. 1850-1864
Author(s):  
GUI-HUA LIU ◽  
TING-ZHI YAN ◽  
YU-GANG MA ◽  
X. Z. CAI ◽  
D. Q. FANG ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Heavy Ion Collisions ◽  
Elliptic Flow ◽  
Heavy Ion ◽  
Intermediate Energy ◽  
Hard Photon ◽  
Transport Models ◽  
Directed Flow ◽  
Ion Collisions ◽  
Nuclear Clusters

Anisotropic flows of light nuclear clusters and hard photons are studied by nucleonic transport models in intermediate energy heavy ion collisions. The transverse momentum and rapidity dependences of the directed flow (v1) and elliptic flow (v2) are studied for light nuclear clusters and their scaling behaviors are found. The ratio of [Formula: see text] of nuclear clusters show a constant value of 1/2. Proton-neutron bremsstrahlung hard photon shows non-zero flows with the contrary sign of proton's flows.

AZIMUTHAL ASYMMETRY AND CORRELATIONS OF HARD PHOTONS IN INTERMEDIATE ENERGY HEAVY ION COLLISIONS

2010 ◽  
Vol 19 (08n09) ◽  
pp. 1773-1787
Author(s):  
GUI-HUA LIU ◽  
YU-GANG MA ◽  
X. Z. CAI ◽  
D. Q. FANG ◽  
W. GUO ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Early Stage ◽  
Elliptic Flow ◽  
Good Method ◽  
Nuclear Interaction ◽  
Heavy Ion ◽  
Intermediate Energy ◽  
Directed Flow ◽  
Two Photon ◽  
Ion Collisions

Hard photon emitted from energetic heavy ion collisions is of very interesting since it does not experience the late-stage nuclear interaction, therefore it is useful to explore the early-stage information of matter phase. In this work, we investigated the directed flow and elliptic flow for proton-neutron bremsstrahlung hard photons in intermediate energy heavy-ion collisions. The positive directed flow and negative elliptic flow of directed photons are illustrated and they seem to be anti-correlated to the free proton's flow. Also we calculated the two-photon correlation functions from which the information of photon source was extracted, and while two-photon azimuthal correlations are presented as a good method to extract the elliptic flow parameter v2 of direct hard photons.

Hard photon and energetic proton emission in heavy ion collisions at intermediate energy

1998 ◽  
Vol 630 (1-2) ◽  
pp. 215-222 ◽  
Author(s):  
P. Sapienza ◽  
R. Coniglione ◽  
E. Migneco ◽  
C. Agodi ◽  
R. Alba ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Intermediate Energy ◽  
Proton Emission ◽  
Hard Photon ◽  
Energetic Proton ◽  
Ion Collisions

Universal characteristics of transverse momentum transfer in intermediate energy heavy ion collisions

1993 ◽  
Vol 48 (2) ◽  
pp. 926-928 ◽  
Author(s):  
F. Khan ◽  
L. W. Townsend ◽  
R. K. Tripathi ◽  
F. A. Cucinotta
Keyword(s):  
Transverse Momentum ◽  
Momentum Transfer ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Intermediate Energy ◽  
Ion Collisions

Towards a better understanding of hard photon emission in intermediate energy heavy ion collisions

1999 ◽  
Vol 654 (1) ◽  
pp. 761c-764c ◽  
Author(s):  
R. Alba ◽  
C. Maiolino ◽  
C. Agodi ◽  
A. Del Zoppo ◽  
R. Coniglione ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Photon Emission ◽  
Heavy Ion ◽  
Intermediate Energy ◽  
Hard Photon ◽  
Ion Collisions

scholarly journals Pion Transverse Momentum Spectrum, Elliptic Flow, and Interferometry in the Granular Source Model for RHIC and LHC Heavy Ion Collisions

2015 ◽  
Vol 2015 ◽  
pp. 1-18 ◽  
Author(s):  
Jing Yang ◽  
Yan-Yu Ren ◽  
Wei-Ning Zhang
Keyword(s):  
Transverse Momentum ◽  
Heavy Ion Collisions ◽  
Elliptic Flow ◽  
Heavy Ion ◽  
Source Model ◽  
Momentum Spectrum ◽  
Model Parameters ◽  
Transverse Momentum Spectrum ◽  
Relativistic Heavy Ion Collider ◽  
Ion Collisions

We systematically investigate the pion transverse momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss (HBT) interferometry in the granular source model for the heavy ion collisions of Au-Au atsNN=200 GeV and Pb-Pb atsNN=2.76 TeV with different centralities. The granular source model can well reproduce the experimental results of the heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). We examine the parameters involved in the granular source model. The experimental data of the momentum spectrum, elliptic flow, and HBT radii for the two collision energies and different centralities impose very strict constraints on the model parameters. They exhibit certain regularities for collision centrality and energy. The space-time structure and expansion velocities of the granular sources for the heavy ion collisions at the RHIC and LHC energies with different centralities are investigated.

Sign in / Sign up

Export Citation Format

Share Document