scholarly journals Azimuthal angle dependence of the longitudinal spin polarization in relativistic heavy ion collisions

2019 ◽  
Vol 99 (1) ◽  
Author(s):  
Yifeng Sun ◽  
Che Ming Ko
Keyword(s):  
Spin Polarization ◽  
Heavy Ion Collisions ◽  
Azimuthal Angle ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Angle Dependence ◽  
Ion Collisions ◽  
Longitudinal Spin

scholarly journals ϕ Meson Spin Alignment and the Azimuthal Angle Dependence of Λ (Λ) Polarization in Au+Au collisions at RHIC

2018 ◽  
Vol 171 ◽  
pp. 16007
Author(s):  
Biao Tu
Keyword(s):  
Angular Momentum ◽  
Azimuthal Angle ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Spin Orbit Coupling ◽  
Spin Alignment ◽  
Angle Dependence ◽  
Ion Collisions ◽  
200 Gev ◽  
Strong Vorticity

Initial large global angular momentum in non-central relativistic heavy-ion collisions can produce strong vorticity, and through the spin-orbit coupling, causes the spin of particles to align with the system’s global angular momentum. We present the azimuthal angle dependent (relative to the reaction plane) polarization for Λ and Λ in mid-central Au+Au collisions at [see formula in PDF] = 200 GeV. We also present the ϕ meson spin alignment parameter, ρ00 in Au+Au collisions at [see formula in PDF] = 19.6, 27, 39, 62.4 and 200 GeV. The implications of the results are discussed.

Azimuthal angle dependence of molecular orbital K X-rays in heavy ion collisions

1981 ◽  
Vol 300 (1) ◽  
pp. 105-106 ◽  
Author(s):  
P. B�rgy ◽  
G. Bonani ◽  
E. Morenzoni ◽  
M. St�ckli ◽  
Ch. Stoller ◽  
...  
Keyword(s):  
Molecular Orbital ◽  
Heavy Ion Collisions ◽  
Azimuthal Angle ◽  
Heavy Ion ◽  
X Rays ◽  
Angle Dependence ◽  
Ion Collisions

scholarly journals ANALYZING FLOW ANISOTROPIES WITH EXCURSION SETS IN RELATIVISTIC HEAVY-ION COLLISIONS

2012 ◽  
Vol 27 (29) ◽  
pp. 1250168 ◽  
Author(s):  
RANJITA K. MOHAPATRA ◽  
P. S. SAUMIA ◽  
AJIT M. SRIVASTAVA
Keyword(s):  
Heavy Ion Collisions ◽  
Transverse Energy ◽  
Azimuthal Angle ◽  
Threshold Value ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Excursion Sets ◽  
Ion Collisions ◽  
Anisotropic Expansion ◽  
History Of

We show that flow anisotropies in relativistic heavy-ion collisions can be analyzed using a certain technique of shape analysis of excursion sets recently proposed by us for CMBR fluctuations to investigate anisotropic expansion history of the universe. The technique analyzes shapes (sizes) of patches above (below) certain threshold value for transverse energy/particle number (the excursion sets) as a function of the azimuthal angle and rapidity. Modeling flow by imparting extra anisotropic momentum to the momentum distribution of particles from HIJING, we compare the resulting distributions for excursion sets at two different azimuthal angles. Angles with maximum difference in the two distributions identify the event plane, and the magnitude of difference in the two distributions relates to the magnitude of momentum anisotropy, i.e. elliptic flow.

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