[Brahms-l] IA QM2006 abstract

     Hello all,

    I would like to submit a talk to the QM06 regarding the strangeness
production in AuAu 62.4 AGeV collisions. I know that before i said
that i will submit an abstract about the stopping, but i was
overlapping with Hans, and i decided to talk about K-/K+, K/pi ratios
and net-baryon content. Below i enclosed the abstract. Everything is
preliminary and i would like to receive critics and suggestions from
you.
    Thank you in advance.

                           Ionut

The abstract:

Strangeness production in Au+Au reactions at 62.4 AGeV

Ionut Cristian Arsene for BRAHMS Collaboration

  The measurement of strangeness is a valuable tool for understanding the
reaction mechanism of nuclear collisions since all the strange particles
need to be created during the reaction. Also, strangeness
enhancement is one of the predicted signals of the QGP creation.
  The most important mechanism to produce strange and anti-strange quarks
especially at
mid-rapidity is gg->ssbar. At SPS and RHIC energies a
sizeable excess of s quarks was observed.
This is due to processes which break the symmetry between particles and
anti-paticles that depend on the net-baryon content.
  At SPS energies, the strangeness production reach a maxima ("Marek's
horn") wich suggest some sort of a transition to a new regime. Also,
at these energies there is a big asymmetry between the s and the sbar
quarks which are in connection with the high net-baryon content
present at mid-rapidity. The asymmetry between s and sbar quarks
dissapears slowly with increasing energies such that in Au+Au
collisions at 200 AGeV the K-/K+ ratio reach 0.95 at mid-rapidity.
  In the present work we will discuss the behaviour of the strangeness
production with rapidity and net-baryon content in Au+Au collisions at
62.4 AGeV. In this particular reaction, BRAHMS is able to identify
particles up to about 3.5 rapidity units and cover in this way a wide
range of net-baryon values, including the fragmentation region. We
will show spectra and ratios of identified particles as function of mT
and rapidity.

I.Arsene et al., Quark Gluon Plasma and Color Glass Condensate at
RHIC? The perspective from the BRAHMS experiment, Nucl.Phys.A757(2005)1-27

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