Heavy Ion Tea
| Tuesday, July 31, 2007 | 3:30 pm, Pers Hall |
Long-Range Multiplicity Correlations in Relativistic
Heavy Ion Collisions at RHIC
Results for short and long-range multiplicity correlations
(forward-backward) are presented for several systems (Au+Au, Cu+Cu, and
pp) and energies (e.g. $\sqrt{s_{NN}}$ = 200 and 62.4 GeV). For the
highest energy central A+A collisions, the correlation strength
maintains a constant value across the measurement region. In peripheral
collisions, at lower energies, and in pp data, the maximum appears at
midrapidity.
Comparison to models with short-range (HIJING) and both short and
long-range interactions (Parton String Model) do not fully reproduce
central Au+Au data. This result may indicate a reduction in number
of particle sources for central Au+Au collisions at $\sqrt{s_{NN}}$ =
200 GeV and the possible formation of high density matter.
and the Search for Quark-Gluon Matter
Terence J.Tarnowsky (Purdue University)
Abstract:
The measurement of particle correlations has been suggested as a method
to search for the existence of a phase transition in relativistic heavy
ion collisions. If quark-gluon matter is formed in the collision of
relativistic heavy ions, measuring these correlations could lead to a
determination of the presence of partonic degrees of freedom within the
collision.