FYI (I was not able to send out to the list until coming back to BNL) Flemming ------------------------------------------------------ Flemming Videbaek Physics Department Brookhaven National Laboratory tlf: 631-344-4106 fax 631-344-1334 e-mail: videbaek@bnl.gov ----- Original Message ----- From: "Wit Busza" <busza@MIT.EDU> To: <tkirk@bnl.gov>; <hallman@bnl.gov>; <videbaek@bnl.gov>; <zajc@columbia.edu> Cc: <phobos@MIT.EDU> Sent: Wednesday, May 22, 2002 2:54 PM Subject: Phobos publication on flow at 130GeV > Dear Colleagues: > > I am pleased to be able to advise you that the Phobos collaboration has > completed its internal review of a paper on flow at 130GeV. We plan to > submit it to PRL on Wednesday May 29. Below you will find the abstract of > the paper. > > All the best, > Wit > > > > Pseudorapidity and centrality dependence of the collective flow of > charged particles in Au+Au collisions at $\sqrt{s_{_{NN}}} =$ 130 > GeV > PHOBOS Collaboration > This paper describes the measurement of collective flow for > charged particles in Au+Au collisions at $\sqrt{s_{_{NN}}} =$ 130 > GeV using the PHOBOS detector at the Relativistic Heavy Ion > Collider (RHIC). An azimuthal anisotropy is observed in the > charged particle hit distribution in the PHOBOS multiplicity > detector. This anisotropy is presented over a wide range of > pseudorapidity ($\eta$) for the first time at this energy. The > size of the anisotropy (v$_{2}$) is thought to probe the degree of > equilibration achieved in these collisions. The result here, > averaged over momenta and particle species, is observed to reach > 7\% for peripheral collisions at mid-rapidity, falling off with > centrality and increasing $|\eta|$. Data are presented as a > function of centrality for $|\eta|<1.0$ and as a function of > $\eta$, averaged over centrality, in the angular region {\mbox > -5.0$<\eta<$5.3}. These results call into question the common > assumption of longitudinal boost invariance over a large region of > rapidity in RHIC collisions. > > >
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