From: J.H. Lee (jhlee@sgs1.hirg.bnl.gov)
Date: Fri Mar 07 2003 - 11:48:50 EST
Hi, Ian, As we all know, our current configuration is not suitable for that. We only have 6 segmentations in phi, and they are not event fully covered. Only 2 rows of Tile, and no row in Si have 2pi coverage in phi. The 2 rows in Tile are sitting eta ~ 1.5-2, where v2 is significantly smaller that values at y=0. If we are not going to get more Au+Au data, we probably can try very hard to get some information out of what we had, but the resolution and systematic error are going to be pretty miserable. I still believe that the better way to measure it at BRAHMS is either reconfigure (rotate) silicon (high segmentation in eta -> high segmentation in phi) or make a new detector for the next Au+Au run. We are still the only experiment which can measure particle dependent flow in y=0 to 3. What we should do is measure reaction plane using silicon or/and new flow detector, and look at particle yields as a function of (rapidity, phi, centrality). I think a good candidate for a new/additional flow detector would be a reasonably well-segmented (>16 ) in phi pizza-shaped scintillators covering ~1-2 units of pseudo-rapidity around beam pipe. JH ----- Original Message ----- From: "Ian Bearden" <bearden@nbi.dk> To: <brahms-l@bnl.gov> Sent: Friday, March 07, 2003 4:45 AM Subject: Re: BNL workshop 6-8 March > And another thing.... > > Can we get the event plane from the Si+Tiles? That would be a good > thing, I think. Who is/has looked into this? > Cheers, > Ian > p.s. Bjxrn, the appropriate response to such theorists is to say that > you KNOW they can come up with a fully microscopic model of > relativistic heavy ion collisions, so could they just please go do it! > On torsdag, mar 6, 2003, at 17:31 Europe/Copenhagen, Bjorn H Samset > wrote: > > > > > On Wed, 5 Mar 2003, Flemming Videbaek wrote: > > > >> Dear Collegue > >> > >> Attache is the ref to the agena for the workshop the next comign days > >> at > >> BNL. Bjoern Samset is speaking for Brahms tomorrow morning at 9.20 > >> > >> See the web ref for the program in general > >> Flemming > >> > > > > Hello all. The presentation seemed to go well, and judging by the > > number > > of questions both during and after the talk people were paying good > > attention to what we showed. The main questions and comments were about > > our identified hadron spectra and the mt fit we use - some were > > sceptical > > about our ratios because they did not trust our spectra at the low and > > high ends of the fit range. Also, we got told by several theorists that > > they KNOW we can do elliptic flow with Si+Tiles, so would we please > > just > > go and to the analysis? ;-) > > > > The presentation can be found on the BRAHMS presentations page. > > > > Ping :-) > > > > -- > > Bjorn H. Samset Phone: 22856465/92051998 > > PhD student, heavy ion physics Adr: Schouterrassen 6 > > Inst. of Physics, University of Oslo 0573 Oslo > > \|/ > > ----------------------------> -*- <----------------------------- > > /|\ > > > > >
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