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Scaling of Anisotropic Flows in Intermediate Energy and Ultra-relativistic Heavy Ion Collisions
Anisotropic flows ( and ) of hadrons and light nuclear clusters are
studied by a partonic transport model and nucleonic transport model,
respectively, in ultra-relativistic and intermediate energy heavy ion
collisions. Both number-of-constituent-quark scaling of hadrons, especially for
meson which is composed of strange quarks, and number-of-nucleon scaling
of light nuclear clusters are discussed and explored for the elliptic flow
(). The ratios of of hadrons and nuclear clusters are,
respectively, calculated and they show different constant values which are
independent of transverse momentum. The above phenomena can be understood,
respectively, by the coalescence mechanism in quark-level or nucleon-level.Comment: Proceeding of the 6th China-Japan Joint Nuclear Physics Symposium,
Shanghai, China, May 16-20, 2006. 9 pages, 4 figure
Scaling of Anisotropic Flows and Nuclear Equation of State in Intermediate Energy Heavy Ion Collisions
Elliptic flow () and hexadecupole flow () of light clusters have
been studied in details for 25 MeV/nucleon Kr + Sn at large
impact parameters by Quantum Molecular Dynamics model with different potential
parameters. Four parameter sets which include soft or hard equation of state
(EOS) with/without symmetry energy term are used. Both number-of-nucleon ()
scaling of the elliptic flow versus transverse momentum () and the scaling
of versus have been demonstrated for the light clusters
in all above calculation conditions. It was also found that the ratio of
keeps a constant of 1/2 which is independent of for all the
light fragments. By comparisons among different combinations of EOS and
symmetry potential term, the results show that the above scaling behaviors are
solid which do not depend the details of potential, while the strength of flows
is sensitive to EOS and symmetry potential term.Comment: 5 pages, 5 figure
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