[Brahms-l] Fw: New PHENIX paper on jet properties in d+Au collisions

FYI
----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "W.A. Zajc" <zajc@nevis.columbia.edu>
To: "'Aronson, Samuel'" <samaronson@bnl.gov>; "'Busza, Wit '"
<busza@mit.edu>; "'Timothy Hallman'" <hallman@bnl.gov>; "'flemming
videbaek'" <videbaek@bnl.gov>
Sent: Thursday, September 29, 2005 7:06 AM
Subject: New PHENIX paper on jet properties in d+Au collisions


> Dear Sam, Wit, Tim and Flemming:
>
>
> I am pleased to announce that PHENIX intends to submit a paper on Jet
> Structure from Di-Hadron Correlations in d+Au collisions to Physical
Review
> C in one week. Please find the title and abstract below. The results are
> essentially identical with those that have been shown at QM04 and QM05.
>
>
> Best regards,
>
> Bill
>
> =======================================================================
>
> Jet Structure from Di-Hadron Correlations in d+Au collisions at
> \sqrt{s_{NN}}=200 GeV
>
>
> Di-hadron correlations at high transverse momentum in $d$ + Au~collisions
at
> $\sqrt{s_{\rm{NN}}}$ = 200 GeV at midrapidity are measured by the PHENIX
> experiment at the Relativistic Heavy Ion Collider (RHIC). From these
> correlations we extract several structural characteristics of jets; the
> root-mean-squared (RMS) transverse momentum of fragmenting hadrons with
> respect to the jet $\sqrt{\langle j_T^2 \rangle}$, the mean sine-squared
> angle between the scattered partons $\langle \sin^2(\phi_{jj}) \rangle$,
and
> the number of particles produced within the di-jet that are associated
with
> a high-$p_T$ particle ($dN/dx_E$ distributions). We observe that the
> fragmentation characteristics of jets in $d$ + Au~collisions are very
> similar to those in $p+p$~collisions and that there is also little
> dependence on the centrality of the $d$ + Au~collision. This is consistent
> with the nuclear medium having little influence on the fragmentation
> process.
> Furthermore, there is no statistically significant increase in the value
of
> $\langle \sin^2(\phi_{jj}) \rangle$ from $p+p$~to $d$ + Au~collisions.
This
> constrains the amount of multiple scattering that partons undergo in the
> cold nuclear medium before and after a hard-collision.
>


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