Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2011-04-15
Phys.Rev.C83:054902,2011
Physics
Nuclear Physics
Nuclear Experiment
5 pages, 3 figures, accepted for publication in Physical Review C
Scientific paper
10.1103/PhysRevC.83.054902
Longitudinal scaling of pseudorapidity distribution of charged particles ($dN_{\mathrm {ch}}/d\eta$) is observed when presented as a function of pseudorapidity ($\eta$) shifted by the beam rapidity ($\eta$ - $y_{\mathrm {beam}}$) for a wide range of collision systems ($e^{+}+e^{-}$, p+p, $d$+A and A+A) and beam energies. Such a scaling is also observed for the elliptic flow ($v_{2}$) of charged hadrons in A+A collisions. This is a striking observation, as $v_{2}$ is expected to be sensitive to the initial conditions, the expansion dynamics and the degrees of freedom of the system, all of which potentially varies with collision system and colliding energies. We present a study of the longitudinal scalings of $dN_{\mathrm {ch}}/d\eta$, average transverse momentum ($< p_{\mathrm T}>$) and $v_{2}$ using transport models UrQMD and AMPT for Au+Au collisions at center of mass energies ($\sqrt{s_{\mathrm {NN}}}$) of 19.6, 62.4, 200 GeV and Pb+Pb collisions at 2760 GeV. Only the AMPT models which includes partonic effects and quark coalescence as a mechanism of hadronization, shows longitudinal scaling for $dN_{\mathrm {ch}}/d\eta$, $< p_{\mathrm T}>$ and $v_{2}$. Whereas the UrQMD and AMPT default versions show longitudinal scaling only for $dN_{\mathrm {ch}}/d\eta$ and $
Jena Chitrasen
Kumar Lokesh
Mohanty Bedangadas
Nasim Md.
Netrakanti Pawan Kumar
No associations
LandOfFree
Longitudinal scaling of observables in heavy-ion collision models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Longitudinal scaling of observables in heavy-ion collision models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Longitudinal scaling of observables in heavy-ion collision models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-8879