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Identical Meson Interferometry in STAR Experiment | | Debasish Das
; | | Date: |
22 Feb 2007 | | 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 $sqrt{s_{
m{NN}}}$ = 62.4 GeV and Cu+Cu collisions at $sqrt{s_{
m{NN}}}$ = 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 $sqrt{s_{
m{NN}}}$ = 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 $N_{part}$ 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. | | Source: | arXiv, nucl-ex/0702047 | | Services: | Forum | Review | PDF | Favorites | |
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