Identical Meson Interferometry in STAR Experiment
Abstract
The influence of Bose-Einstein statistics on multi-particle production characterized for various systems and energies by the STAR collaboration provides interesting information about the space-time dynamics of relativistic heavy-ion collisions at RHIC. We present the centrality and transverse mass dependence measurements of the two-pion interferometry in Au+Au collisions at = 62.4 GeV and Cu+Cu collisions at = 62.4 GeV and 200 GeV. We compare the new data with previous STAR measurements from p+p, d+Au and Au+Au collisions at = 200 GeV. In all systems and centralities, HBT radii decrease with transverse mass in a similar manner, which is qualitatively consistent with collective flow.The scaling of the apparent freeze-out volume with the number of participants and charged particle multiplicity is studied. Measurements of Au+Au collisions at same centralities and different energies yield different freeze-out volumes, which mean that is not a suitable scaling variable. The multiplicity scaling of the measured HBT radii is found to be independent of colliding system and collision energy.
Cite
@article{arxiv.nucl-ex/0702047,
title = {Identical Meson Interferometry in STAR Experiment},
author = {Debasish Das},
journal= {arXiv preprint arXiv:nucl-ex/0702047},
year = {2008}
}
Comments
(for the STAR Collaboration) 6 pages and 5 figures Poster presented at 19th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions: Quark Matter 2006 (QM 2006), Shanghai, China, 14-20 Nov. 2006. To be published in International Journal of Modern Physics E (World Scientific)