Dear Steve,
it looks good to me.
Michael
Quoting "Stephen J. Sanders" <ssanders@ku.edu>:
> Hi,
> Below is a draft abstract that I would like to submit to the
> mini-symposium
> on "Gluon Saturation at RHIC" at the Fall DNP meeting. The
> abstract deadline is Monday so please send comments and corrections
> before
> then. Thanks.
>
> ...steve
>
>
>
> ABSTRACT:
> Charged-Particle Pseudorapidity Densities at BRAHMS
>
> S.J. Sanders for the BRAHMS Collaboration
>
> One of the suggested signatures for a saturation of the number of
> parton
> collisions in central nucleus-nucleus collisions at higher energies is
> a
> limit on the production of charged particles [1-3]. The BRAHMS
> experiment
> has measured charged-particle pseudorapidity densities as a function
> collision centrality at sqrt[s_nn]=130 GeV [4] and 200 GeV [5] for the
> pseudorapidity range of 4.7<=eta<=4.7. Close to beam rapidity, the
> pseudorapidity densities at the two energies scale in a manner
> consistent
> with a limiting fragmentation picture in which the excitations of the
> fragment baryons saturate at a moderate collision energy, independent
> of
> system size. At mid-rapidity for the 5% most central events we find a
> 14%
> increase in pseudorapidity density at sqrt[s_nn]=200 GeV relative to
> sqrt[s_nn]=130 GeV. The calculations of Kharzeev and Levin [3], which
> include gluon saturation effects, are in reasonable agreement with
> this
> result. We note, however, that an alternative calculation [6] gives
> comparably good results without including saturation effects. This
> talk
> will present the BRAHMS results at the two RHIC energies in the context
> of
> current models. Data on p+p scattering at the highest RHIC energy will
> also
> be presented.
>
>
>
> [1] L.V. Gribov, E.M Levin and M.G. Ryskin, Phys. Rep. 100, 1(1983).
> [2] K.J. Eskola, K. Kajantie and K. Tuominen, Phys. Lett. B497,
> 39(2001).
> [3] D. Kharzeev and E. Levin, Phys. Lett. B 523, 79(2001).
> [4] I.G. Bearden et al., Phys. Lett. B523, 227(2001).
> [5] I.G. Bearden et al., Phys. Rev. Lett. (2002).
> [6] Zi-Wei Lin et al., Phys. Rev. C 64, 011902R(2001); and Zi-wei Lin,
> private communication.
>
Michael Murray, Cyclotron TAMU, 979 845 1411 x 273, Fax 1899
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