Results from the PHOBOS Experiment on Au+Au Collisions at RHIC

TL;DR

This paper reports initial results from the PHOBOS experiment at RHIC, measuring charged particle densities in gold-gold collisions at 56 and 130 AGeV, and compares these with lower energy and proton-proton collision data.

Contribution

First physics results from PHOBOS at RHIC for central Au+Au collisions at high energies, including pseudorapidity density measurements near midrapidity.

Findings

Charged particle pseudorapidity density measured at RHIC energies.

Comparison of RHIC data with lower energy and proton-proton collisions.

Progress in data analysis of early RHIC collision data.

Abstract

PHOBOS is one of four experiments studying the Au-Au interactions at RHIC. The data collected during the first few weeks after the RHIC start-up, using the initial configuration of the PHOBOS detector, were sufficient to obtain the first physics results for the most central collisions of Au nuclei at the center of mass energy of 56 and 130 AGeV. The pseudorapidity density of charged particles near midrapidity is shown and compared with data at lower energies and from $pp$ and $p\bar{p}$ collisions. The progress of the analysis of the data is also presented.PHOBOS is one of four experiments studying the Au-Au interactions at RHIC. The data collected during the first few weeks after the RHIC start-up, using the initial configuration of the PHOBOS detector, were sufficient to obtain the first physics results for the most central collisions of Au nuclei at the center of mass energy of 56 and 130 AGeV. The pseudorapidity density of charged particles near midrapidity is shown and compared with data at lower energies and from $pp$ and $p\bar{p}$ collisions. The progress of the analysis of the data is also presented.