Hi Claus, Sorry, my comment on background was not clear. I mean background contributions on the charged particle multiplicities (multiplicity cut). This has no influence on the pt spectra, but it should affect the accuracy on the centrality determination (multiplicity cut). I agree with Ramiro, data at forward rapidities (your last plot) are the most important for us. What do we expect to see in this region? There, the medium is expected to be less dense which means lower dE/dx and therefore lower suppression. So, by comparing data at different rapidities, one could hope to extract some information (through comparison to models) on the variation of the amount of the energy loss with the density of the traversed medium. Look at this paper -> nucl-th/0108056 (it might be useful for your talk). Cheers, Fouad ---------------------------------------------------------------------------- Fouad RAMI e-mail : fouad.rami@ires.in2p3.fr IReS phone : 33.(0)3.88.10.62.00 23,rue du Loess : 33.(0)3.88.10.64.55 B.P.28-BAT.20 (secretary's office) 67037 STRASBOURG CEDEX 2 fax : 33.(0)3.88.10.66.14 FRANCE ---------------------------------------------------------------------------- On Fri, 5 Jul 2002, Claus O. E. Jorgensen wrote: > > Hi Fouad, > > Thanks for the comments. > > > Where is the plot showing the pt ratio of central (0-10) to > > semi-peripheral (40-60) ? > > It is on its way... > > > Could you please give a bit more details on the plots. > > (not easy to figure out what is plotted there!). > > The y=0 plots are inspired from the high pt STAR. More details will > follow... > > > It would be also helpful if you could number your plots. > > > > 2 general questions: > > - Did you analyse all available data ? or is there still some hope > > to increase the statistics? > > I've used all the statistics we have. > > > - Did you subtract background contributions for the most peripheral > > cuts (in particular, the 40-60%) ? > > What background contributions? The spectra are corrected for geometrical > acceptance. Other corrections should be very small at high pt, which is > the focus of the talk. > > I'll let you know when I update the homepage... > > Cheers, > > Claus > > +-------------------------------------------------------------+ > | Claus Jørgensen | > | Cand. Scient. Phone : (+45) 33 32 49 49 | > | Cell : (+45) 27 28 49 49 | > | Niels Bohr Institute, Ta-2, Office : (+45) 35 32 53 07 | > | Blegdamsvej 17, DK-2100, E-mail : ekman@nbi.dk | > | University of Copenhagen Home : www.nbi.dk/~ekman/ | > +-------------------------------------------------------------+ > > >
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