scholarly journals Photon decay in a strong magnetic field in heavy-ion collisions

2011 ◽  
Vol 83 (1) ◽  
Author(s):  
Kirill Tuchin
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Photon Decay ◽  
Ion Collisions

scholarly journals Nonequilibrium Dynamics of the Chiral Quark Condensate under a Strong Magnetic Field

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 551
Author(s):  
Gastão Krein ◽  
Carlisson Miller
Keyword(s):  
Magnetic Field ◽  
Time Evolution ◽  
Strong Magnetic Field ◽  
Early Universe ◽  
Langevin Equation ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Quark Condensate ◽  
Damping Coefficient ◽  
Ion Collisions

Strong magnetic fields impact quantum-chromodynamics (QCD) properties in several situations; examples include the early universe, magnetars, and heavy-ion collisions. These examples share a common trait—time evolution. A prominent QCD property impacted by a strong magnetic field is the quark condensate, an approximate order parameter of the QCD transition between a high-temperature quark-gluon phase and a low-temperature hadronic phase. We use the linear sigma model with quarks to address the quark condensate time evolution under a strong magnetic field. We use the closed time path formalism of nonequilibrium quantum field theory to integrate out the quarks and obtain a mean-field Langevin equation for the condensate. The Langevin equation features dissipation and noise kernels controlled by a damping coefficient. We compute the damping coefficient for magnetic field and temperature values achieved in peripheral relativistic heavy-ion collisions and solve the Langevin equation for a temperature quench scenario. The magnetic field changes the dissipation and noise pattern by increasing the damping coefficient compared to the zero-field case. An increased damping coefficient increases fluctuations and time scales controlling condensate’s short-time evolution, a feature that can impact hadron formation at the QCD transition. The formalism developed here can be extended to include other order parameters, hydrodynamic modes, and system’s expansion to address magnetic field effects in complex settings as heavy-ion collisions, the early universe, and magnetars.

Workshop on Chirality, Vorticity, and Magnetic Field in Heavy Ion Collisions

2019 ◽  
Vol 29 (3) ◽  
pp. 33-34
Author(s):  
Huan Zhong Huang ◽  
Jinfeng Liao ◽  
Pengfei Zhuang
Keyword(s):  
Magnetic Field ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Ion Collisions

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 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 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.

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