Multiparticle Correlation Functions: A probe for the High Energy Density Nuclear Matter created at RHIC

Astronomy and Astrophysics – Astrophysics

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In a recent publication [1], the PHENIX collaboration has reported on the transverse momentum spectra for charged hadrons and for neutral pions in the range 1 < pT < 5 GeV/c. The spectra from peripheral nuclear collisions were found to be consistent with a simple scaling of the spectra from p+p collisions by the average number of nucleon-nucleon binary collisions. In contrast, the spectra from central collisions appeared to be significantly suppressed when compared to that from peripheral collisions as well as to the scaled p+p expectation. These observations have been interpreted as an important signature for jet quenching( [1],[2]) in central Au + Au collisions at RHIC. Significant jet production should also lead to discernable multi-particle correlations. Thus, the study of such correlations and their possible modification due to quenching, offers a promising opportunity for the investigation and study of QGP formation at RHIC. The multiparticle correlation analysis technique will be presented in conjunction with possible results for Au + Au data (sqrt(s) = 200GeV/c) obtained with the PHENIX detector at RHIC [1] Adcox et al., Phys. Rev. Lett. 88, 022301 (2001) [2] M. Gyulassy and X.-N. Wang, Nucl. Phys. B420, 583 (1994)X.-N. Wang, M.Gyulassy and M. Pluemer, Phys. Rev. D 51, 3436 (1995)

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