Minutes of BRAHMS analysis meeting 07 Jan 2011 ======================================= Agenda and slides at http://indico.cern.ch/conferenceDisplay.py?confId=104315 # 09:30 - 09:50 Spectra comparison (first steps to final Raa) 20' Pawel Staszel # 09:50 - 10:10 Brief Update on CuCu_at_200 GeV (Selemon Bekele) Todo: ==== Pawel >>> Produce R_AA Selemon >>> Use new p and pbar spectra from Flemming in fits, understand meaning of pseudo-rapidity profile in blast wave fit. Flemming and Kris >>> Work on text of pp paper. It was decided to move the meetings to Mondays 2pm Eastern Time, next one 24 January ---------------------------------------------------------------------------------------------------------- Before Pawel started Flemming commented that he has been working on the draft of the pp paper and in a week he and Kris will start iterating. He thinks that this can be sent out to the collaboration soon. Spectra comparison (first steps to final Raa) Pawel ======================================= Pawel presented pp => pi+ plots at forward rapidity and compared those to FV concerned about PID, Pawel says it was the same as for PID paper so we are happy. We should have about the same amount as negatives as positives. He is doing a quick cross check of the AuAu results and it looks good so far. Brief Update on CuCu_at_200 GeV ========================== Selemon has being doing a systematic study of various density profiles in the blas wave fit. He think that it is best to concentrate on the Gaussian profile. For this only the ratio of the Gaussian radius to the maximum radius seems to matter. It seems best to take R_max = 3.5 * R_Guass. It seems that the alpha parameter is of order 0.4 while the surface velocity is of the order to 0.5. One question was weather he need to include any dependence of the source function on pseudo-rapidity. We decided that we would need to read up on this function in order to understand what it means. Pawel commented that the blast wave does not have any reasonances and perhaps a thermal freezeout + blastwave+ hadronic afterburner might be better. This may be too much for us but we should beat it in mind. For the data CuCu Flemming has produced some new DSTs will allow us to go down to 400MeV rather than 900MeV at present. This should be a good constraint for the blast wave fit. AOB: V2 Steve: No progress this last two weeks. We will shift our meetings to Monday's at 2pm Eastern Time. Next meeting Monday 24th of January. ================ Submitted by Michael ======================== Minutes of BRAHMS analysis meeting 07 Jan 2011 ======================================= Agenda and slides at http://indico.cern.ch/conferenceDisplay.py?confId=104315 # 09:30 - 09:50 Spectra comparison (first steps to final Raa) 20' Pawel Staszel # 09:50 - 10:10 Brief Update on CuCu_at_200 GeV (Selemon Bekele) Todo: ==== Pawel >>> Produce R_AA Selemon >>> Use new p and pbar spectra from Flemming in fits, understand meaning of pseudo-rapidity profile in blast wave fit. Flemming and Kris >>> Work on text of pp paper. It was decided to move the meetings to Mondays 2pm Eastern Time, next one 24 January ---------------------------------------------------------------------------------------------------------- Before Pawel started Flemming commented that he has been working on the draft of the pp paper and in a week he and Kris will start iterating. He thinks that this can be sent out to the collaboration soon. Spectra comparison (first steps to final Raa) Pawel ======================================= Pawel presented pp => pi+ plots at forward rapidity and compared those to FV concerned about PID, Pawel says it was the same as for PID paper so we are happy. We should have about the same amount as negatives as positives. He is doing a quick cross check of the AuAu results and it looks good so far. Brief Update on CuCu_at_200 GeV ========================== Selemon has being doing a systematic study of various density profiles in the blas wave fit. He think that it is best to concentrate on the Gaussian profile. For this only the ratio of the Gaussian radius to the maximum radius seems to matter. It seems best to take R_max = 3.5 * R_Guass. It seems that the alpha parameter is of order 0.4 while the surface velocity is of the order to 0.5. One question was weather he need to include any dependence of the source function on pseudo-rapidity. We decided that we would need to read up on this function in order to understand what it means. Pawel commented that the blast wave does not have any reasonances and perhaps a thermal freezeout + blastwave+ hadronic afterburner might be better. This may be too much for us but we should beat it in mind. For the data CuCu Flemming has produced some new DSTs will allow us to go down to 400MeV rather than 900MeV at present. This should be a good constraint for the blast wave fit. AOB: V2 Steve: No progress this last two weeks. We will shift our meetings to Monday's at 2pm Eastern Time. Next meeting Monday 24th of January. ================ Submitted by Michael ======================== _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l_at_lists.bnl.gov https://lists.bnl.gov/mailman/listinfo/brahms-dev-lReceived on Fri Jan 07 2011 - 11:30:33 EST
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