Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-12-18
Phys.Lett. B601 (2004) 41-50
Physics
Nuclear Physics
Nuclear Theory
12 pages, 5 figures
Scientific paper
10.1016/j.physletb.2004.09.025
Using effective formulas we analyze the Bose-Einstein correlations (BEC) data corrected for Coulomb interactions provided by STAR Collaboration and the quasi-corrected data (raw data with acceptance correction etc) on 2\pi and 3\pi BEC by using Coulomb wave function with coherence parameter included. The corresponding magnitudes of the interaction regions turn out to be almost the same: R_{Coul}(2\pi) \simeq \frac 32R_{Coul}(3\pi). R_{Coul} means the size of interaction region obtained in terms of Coulomb wave function. This approximate relation is also confirmed by the core-halo model. Moreover, the genuine 3rd order term of BEC has also been investigated in this framework and its magnitude has been estimated both in the fully corrected data and in the quasi-corrected data.
Biyajima Minoru
Kaneyama Masahiro
Mizoguchi Takuya
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