2011/12/31 by M. R. Haque, Md. Rihan Haque, Zi-Wei Lin +2 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Anisotropy #Combinatorics #Energy (signal processing) #Geometry #High-Energy Particle Collisions Research #Multiplicity (mathematics) #Nuclear Materials and Properties #Nuclear reactor physics and engineering #Order (exchange) #Particle physics #Physics #Quantum mechanics #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.85.034905
10 pages and 29 figures. Accepted for publication in Physical Review C
arxiv created 2012/03/15 · openalex publication_date 2012/03/20 · arxiv updated 2015/06/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using a multiphase transport (AMPT) model that includes the implementation of deformed uranium nuclei, we have studied the centrality dependence of the charged particle multiplicity (Nch, dNch/d\ensuremathη), average transverse momentum (\ensuremath⟨pT\ensuremath⟩), eccentricity (\ensuremathε2), triangularity (\ensuremathε3), their fluctuations, elliptic flow (v2), and triangular flow (v3) for different configurations of U+U collisions at midrapidity for √sNN = 200 GeV. The calculations have been done for both the default and string-melting versions of the AMPT model. The results are compared to the corresponding observations from Au+Au collisions. We find that for the U+U collisions dNch/d\ensuremathη at midrapidity is enhanced by about 15%--40% depending on the collision and model configuration chosen, compared to Au+Au collisions. Within the several configurations studied, the tip-to-tip collisions lead to the largest values of Nch, transverse energy (ET), and \ensuremath⟨pT\ensuremath⟩. Both \ensuremath⟨\ensuremathε2\ensuremath⟩ and its fluctuation show a rich centrality dependence, whereas little variation is observed for \ensuremath⟨\ensuremathε3\ensuremath⟩ and its fluctuations. The U+U side-on-side collision configuration provides maximum values of \ensuremath⟨\ensuremathε2\ensuremath⟩ and minimum values of eccentricity fluctuations, whereas for peripheral collisions and mid-central collisions minimum values of \ensuremath⟨\ensuremathε2\ensuremath⟩ and the maximum value of eccentricity fluctuations are observed for the body-to-body configuration and the tip-to-tip configuration has a minimum value of \ensuremath⟨\ensuremathε2\ensuremath⟩ and a maximum value of eccentricity fluctuations for central collisions. The calculated v2 value closely correlates with the eccentricity in the model. It is smallest for the body-to-body configuration in peripheral and mid-central collisions while it is minimum for the tip-to-tip configuration in central collisions. For peripheral collisions v2 in U+U can be about 40% larger than in Au+Au whereas for central collisions it can be a factor of 2 higher depending on the collision configuration. It is also observed that v3(pT) is higher for tip-to-tip and body-to-body configurations compared to other systems for the collision centrality studied.