[Brahms-l] Fw: Release of PHOBOS paper on 62.4 GeV spectra

Dear Collaborator

as you can see some people are driving their collaborations hard. Depending
what they actually show
and in particular the 'poorly known' pp at 63 GeV this may or may not be an
existing result.

flemming

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

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "Mark D. Baker" <baker@rcf.rhic.bnl.gov>
To: <tkirk@bnl.gov>
Cc: <hallman@bnl.gov>; <zajc@nevis.columbia.edu>; <videbaek@bnl.gov>;
<phobos@mit.edu>
Sent: Wednesday, April 28, 2004 5:10 PM
Subject: Release of PHOBOS paper on 62.4 GeV spectra


> Dear Tom, Tim, Bill, and Flemming
>
> I'm pleased to announce that our results on the centrality and energy
> dependence of charged particle spectra will be submitted to Physical
> Review Letters in one week (W May 5, 2004). These results will be shown by
> Dr. Gabor Veres at the APS meeting in Denver on May 4 and by Prof.
> Gunther Roland at a special seminar at BNL on W May 5 at 11am.
>
> The title and abstract can be found below.
>
> Best regards,
> Mark
>
> Centrality dependence of charged hadron transverse momentum spectra
> in Au+Au collisions from sqrt(s_{NN}) = 62.4 to 200 GeV
>
> We have measured transverse momentum distributions of charged hadrons
> produced in Au+Au collisions at sqrt(s_{NN}) = 62.4 GeV.
> The spectra are presented for transverse momenta 0.25 < p_T < 4.5 GeV/c,
> in a pseudo-rapidity range of 0.2 < eta < 1.4. The nuclear modification
> factor R_{AA} is calculated relative to p+p data at the same collision
> energy as a function of collision centrality. For p_T > 2 GeV/c, R_{AA}
> is found to be significantly larger than in Au+Au collisions at
> sqrt(s_{NN}) = 130 and 200 GeV. In contrast, we find that the evolution
> of the invariant yields per participant pair from peripheral to central
> collisions is approximately energy-independent over this range of
> collision energies. This observation challenges models of high p_T
> hadron suppression in terms of parton energy loss.
>


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