From: Pawel Staszel (ufstasze@if.uj.edu.pl)
Date: Thu May 29 2003 - 15:02:02 EDT
Hi Claus, I put my comment below. Claus O. E. Jorgensen wrote: >Hi analysers, > >I think it's time we all agree on a standard dst and I can see it's on the >agenda of the collaboration meeting, so maybe we should start the >discussion. I would be nice to have a framework (that can be used for data >from all collisions systems) ready for the meeting. As I see it we have to >figure out a couple of things: > >- (the easy part) What should the DST contain? What information do we > need from what detectors? I think the bdst is pretty close to what we > want - maybe it needs a few modifications for the d+Au and p+p data. > >- How should we organize the data? I like the tree structure but I miss > the run information. As it is now the run number is written down for > every single event and information about spectrometer setting, trigger > scale down, etc is not there. It would be nice to store it with the dst, > but not in every event. Any ideas how to do this in a smart way in > ROOT? > > Why not create a new class called (e.g.) BrDstEvent and save the respective objects as a single leaf in the tree structure. BrDstEvent could contain header section to keep global information (like event number) and array-type objects to keep information about tracks (particles). We can also split BrDstEvent into a few sub-classes (according to the type or the meaning of variables) and keep them in the different branches. Regards Pawel. >Please comment (if you are interested in the future of BRAHMS analysis)... > >Cheers, > >Claus > > >+------------------------------------------------------------+ >| Claus E. Jørgensen Phone : (+45) 33 32 49 49 | >| Cand. Scient. (M. Sc.) Cell : (+45) 27 29 49 49 | >| Office : (+45) 35 32 54 04 | >| Niels Bohr Institute, Ta-2, Fax : (+45) 35 32 50 16 | >| Blegdamsvej 17, DK-2100, E-mail : ekman@nbi.dk | >| University of Copenhagen Home : www.nbi.dk/~ekman/ | >+------------------------------------------------------------+ > > >
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