scholarly journals A Systematic Study of Magnetic Field in Relativistic Heavy-Ion Collisions in the RHIC and LHC Energy Regions

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Yang Zhong ◽  
Chun-Bin Yang ◽  
Xu Cai ◽  
Sheng-Qin Feng
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Heavy Ion Collisions ◽  
Field Model ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Collision Time ◽  
Ion Collisions ◽  
200 Gev ◽  
Magnetic Field Model

The features of magnetic field in relativistic heavy-ion collisions are systematically studied by using a modified magnetic field model in this paper. The features of magnetic field distributions in the central point are studied in the RHIC and LHC energy regions. We also predict the feature of magnetic fields at LHCsNN=900, 2760, and 7000 GeV based on the detailed study at RHICsNN=62.4, 130, and 200 GeV. The dependencies of the features of magnetic fields on the collision energies, centralities, and collision time are systematically investigated, respectively.

scholarly journals Particle Yields in Heavy Ion Collisions and the Influence of Strong Magnetic Fields

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
M. G. de Paoli ◽  
D. P. Menezes
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Heavy Ion Collisions ◽  
Particle Production ◽  
Heavy Ion ◽  
Data Sets ◽  
Ion Collisions ◽  
Particle Ratios ◽  
Klein Gordon ◽  
Star Experiment

It is expected that the magnetic fields in heavy ion collisions are very high. In this work, we investigate the effects of a strong magnetic field on particle ratios within a thermal model of particle production. We model matter as a free gas of baryons and mesons under the influence of an external magnetic field varying from zero to30mπ2through an  χ2fitting to some data sets of the STAR experiment. For this purpose, we use the Dirac, Rarita-Schwinger, Klein-Gordon, and Proca equations subject to magnetic fields in order to obtain the energy expressions and the degeneracy for spin 1/2, spin 3/2, spin 0, and spin 1 particles, respectively. Our results show that, if the magnetic field can be considered as slowly varying and leaves its signature on the particle yields, a field of the order of6mπ2produces an improved fitting to the experimental data as compared to the calculations without magnetic field.

scholarly journals ENHANCEMENT OF FLOW ANISOTROPIES DUE TO MAGNETIC FIELD IN RELATIVISTIC HEAVY-ION COLLISIONS

2011 ◽  
Vol 26 (33) ◽  
pp. 2477-2486 ◽  
Author(s):  
RANJITA K. MOHAPATRA ◽  
P. S. SAUMIA ◽  
AJIT M. SRIVASTAVA
Keyword(s):  
Magnetic Field ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Flow Coefficient ◽  
Relativistic Heavy Ion Collisions ◽  
Early Stages ◽  
Ion Collisions ◽  
Background Magnetic Field ◽  
Different Types ◽  
The Magnetic Field

It is known that the presence of background magnetic field in cosmic plasma distorts the acoustic peaks in CMBR. This primarily results from different types of waves in the plasma with velocities depending on the angle between the magnetic field and the wave vector. We consider the consequences of these effects in relativistic heavy-ion collisions where very strong magnetic fields arise during early stages of the plasma evolution. We show that flow coefficients can be significantly affected by these effects when the magnetic field remains strong during early stages due to strong induced fields in the conducting plasma. In particular, the presence of magnetic field can lead to enhancement in the elliptic flow coefficient v2.

Mean field model for relativistic heavy ion collisions

1987 ◽  
Vol 326 (3) ◽  
pp. 269-277 ◽  
Author(s):  
J. J. Bai ◽  
R. Y. Cusson ◽  
J. Wu ◽  
P. -G. Reinhard ◽  
H. Stoecker ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Field Model ◽  
Mean Field ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Mean Field Model ◽  
Ion Collisions

scholarly journals Effects of magnetic field on plasma evolution in relativistic heavy-ion collisions

2017 ◽  
Vol 96 (3) ◽  
Author(s):  
Arpan Das ◽  
Shreyansh S. Dave ◽  
P. S. Saumia ◽  
Ajit M. Srivastava
Keyword(s):  
Magnetic Field ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions

scholarly journals Anisotropic (v1 and v2) Flow in Relativistic Heavy-Ion Collisions at Energies between 4 GeV and 200 GeV

2018 ◽  
Vol 191 ◽  
pp. 05004
Author(s):  
L.V. Bravina ◽  
Yu. Kvasiuk ◽  
S.Yu. Sivoklokov ◽  
O. Vitiuk ◽  
E.E. Zabrodin
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Relativistic Heavy Ion Collisions ◽  
High Energies ◽  
Ion Collisions ◽  
200 Gev ◽  
Basic Features ◽  
String Models ◽  
Freeze Out

Basic features of directed and elliptic flows of identified hadrons in heavy-ion collisions at intermediate and high energies are considered within two transport string models, UrQMD and QGSM. Both models indicate changing of the sign of proton directed flow at midrapidity from antiflow to normal flow with decreasing energy of collisions. The origin of this effect is traced to hadron rescattering in baryon-rich remnants of the colliding nuclei. To distinguish the effect of rescattering from the flow softening caused by creation of quark-gluon plasma one has to compare heavy-ion and light-ion collisions at the same energy. Both directed and elliptic flows at midrapidity are formed within t = 10-12 fm/c. The differences in the development of elliptic flows of mesons and baryons are found at high energies. These differences can be explained by dissimilar freeze-out conditions, thus suggesting simultaneous study of particle collective flow and freeze-out.

scholarly journals Particle Production in Strong Electromagnetic Fields in Relativistic Heavy-Ion Collisions

2013 ◽  
Vol 2013 ◽  
pp. 1-34 ◽  
Author(s):  
Kirill Tuchin
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Electromagnetic Fields ◽  
Heavy Ion Collisions ◽  
Particle Production ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Strong Electromagnetic Field ◽  
Kinetic Coefficients

I review the origin and properties of electromagnetic fields produced in heavy-ion collisions. The field strength immediately after a collision is proportional to the collision energy and reaches ~mπ2at RHIC and ~10mπ2at LHC. I demonstrate by explicit analytical calculation that after dropping by about one-two orders of magnitude during the first fm/c of plasma expansion, it freezes out and lasts for as long as quark-gluon plasma lives as a consequence of finite electrical conductivity of the plasma. Magnetic field breaks spherical symmetry in the direction perpendicular to the reaction plane, and therefore all kinetic coefficients are anisotropic. I examine viscosity of QGP and show that magnetic field induces azimuthal anisotropy on plasma flow even in spherically symmetric geometry. Very strong electromagnetic field has an important impact on particle production. I discuss the problem of energy loss and polarization of fast fermions due to synchrotron radiation, consider photon decay induced by magnetic field, elucidateJ/ψdissociation via Lorentz ionization mechanism, and examine electromagnetic radiation by plasma. I conclude thatallprocesses in QGP are affected by strong electromagnetic field and call for experimental investigation.

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