Re: [Brahms-l] sqm proceeding

   Hi Michael,

    I have a small comment.
    In page 2, the first phrase, you say that the k+ dN/dy distribution is
wider than the pion distribution because strangeness is related to the
net baryon density. We know that strange quarks are created in pairs
both from the excited vacuum or from rescaterrings (quark-antiquark
and hadronic channels). So, i think that there are 2 reasons for the
wider K+ distribution: 1.) memory effect due to the contained up
quark; and 2) rescatterings create extra strange quarks with a
non-gaussian distribution.
    The memory effect affects also the pions so actually is not producing
a bigger width for kaons. In my opinion, the extra kaonic width is due
to the rescatterings which depend on the baryonic density, not on the
net-baryonic density. I looked over lower energy data (e.g. top AGS,
SPS) and i observed that the K+/pi+ ratio
follows a dependence with the density of protons. Especially in the SPS
Pb+Pb_at_158GeV data, one can observe how the K+/pi+ ratio follows the
fragmentation peak. I'll show some figures in the next days since i am
preparing the article and the abstract for QM08.

           Regards,
               Ionut

>     Dear Brahmin,
>             attached are my (very late) proceedings for SQM07. I
> would be very interested in your timely comments.
> Michael + 1 785 550 8835
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-- 
Ionut Cristian Arsene
PhD student at Physics Department, University of Oslo, Norway
Phone: +47 22856456 (Office)
Phone: +47 94214593 (Mobile)

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