TY - JOUR
T1 - Systematic investigation of azimuthal anisotropy in Au+Au and U+U collisions at √sNN = 200 GeV
AU - Haque, Md Rihan
AU - Nasim, Md
AU - Mohanty, Bedangadas
PY - 2019/7/12
Y1 - 2019/7/12
N2 - We present a study of azimuthal anisotropy parameter (v n) of produced particles in Au+Au and U+U collisions at top RHIC collision energy. The U+U collisions have been studied with and without including the deformed shape of the uranium nuclei. For this purpose, we have used a multi-phase transport (AMPT) model that includes the implementation of deformed uranium nuclei. It is found that the elliptic flow (v 2) is higher in central U+U collisions with deformed uranium nuclei compared to Au+Au and spherical U+U. On the other hand, other higher harmonics (v 3, v 4, and v 5) are found to be almost similar in magnitude for all three systems (Au+Au, deformed U+U, and spherical U+U). We have shown that the magnitude of v 2/ 2 is higher (similar) in Au+Au collisions compared to deformed (spherical) U+U collisions at most central collisions. However, we believe v 2/ 2 reflect true collectivity and more collectivity is expected in large nuclei (U235) compared to the small Au197 nucleus. This indicates that in the case of deformed nuclei, eccentricity ( 2) scaled v 2 may not reflect true collectivity. On the other hand, magnitudes of v 3/ 3, v 4/ 4 and v 5/ 5 for a given centrality are the same for Au+Au, deformed U+U, and spherical U+U collisions. These are interesting observations and can be checked in experimental data at RHIC. We have also compared Au+Au and U+U results with that of Cu+Cu for a better understanding of our findings.
AB - We present a study of azimuthal anisotropy parameter (v n) of produced particles in Au+Au and U+U collisions at top RHIC collision energy. The U+U collisions have been studied with and without including the deformed shape of the uranium nuclei. For this purpose, we have used a multi-phase transport (AMPT) model that includes the implementation of deformed uranium nuclei. It is found that the elliptic flow (v 2) is higher in central U+U collisions with deformed uranium nuclei compared to Au+Au and spherical U+U. On the other hand, other higher harmonics (v 3, v 4, and v 5) are found to be almost similar in magnitude for all three systems (Au+Au, deformed U+U, and spherical U+U). We have shown that the magnitude of v 2/ 2 is higher (similar) in Au+Au collisions compared to deformed (spherical) U+U collisions at most central collisions. However, we believe v 2/ 2 reflect true collectivity and more collectivity is expected in large nuclei (U235) compared to the small Au197 nucleus. This indicates that in the case of deformed nuclei, eccentricity ( 2) scaled v 2 may not reflect true collectivity. On the other hand, magnitudes of v 3/ 3, v 4/ 4 and v 5/ 5 for a given centrality are the same for Au+Au, deformed U+U, and spherical U+U collisions. These are interesting observations and can be checked in experimental data at RHIC. We have also compared Au+Au and U+U results with that of Cu+Cu for a better understanding of our findings.
UR - http://www.scopus.com/inward/record.url?scp=85070753106&partnerID=8YFLogxK
U2 - 10.1088/1361-6471/ab2ba4
DO - 10.1088/1361-6471/ab2ba4
M3 - Article
AN - SCOPUS:85070753106
SN - 0954-3899
VL - 46
JO - Journal of Physics G: Nuclear and Particle Physics
JF - Journal of Physics G: Nuclear and Particle Physics
IS - 8
M1 - 085104
ER -