Hi Claus, Yes I have a comment - until we understand why the rotation help - and demonstarted it is really a rotation this should ONLY be used for checking out analysis NOT used in any production! Flemming PS on the cleanup of tracks - I agree this was not done previous - one reason is that you can envision scenario's in which , what I guess you have done cleaning up first back and then front leads to ambiguities not that it will do it most cases - I will revies when I come back. I also agree it should be done. Good. Flemming ------------------------------------------------------------------ Flemming Videbaek Physics department, Brookhaven national laboratory Upton L.I., NY11973, USA Phone: (516)-344-4106 FAX: (516)-344-1334 secr: (516)-344-7681 e-mail: videbaek@bnl.gov On Wed, 10 Apr 2002, Claus O. E. Jorgensen wrote: > > I forgot to communicate one change I did in the BrModuleMatchTrack. > > It has been observed that the momentum dependence of the Dang matching > parameter can be avoided by a small rotation og the local tracks. I've > added a method to the BrModuleMatchTrack where this rotation can be set: > > SetRotationFactors(fFrontRot, fBackRot) > > In the code the angles are changed like this: > ... > tpcAngleBack.SetX(BackTrack_p->GetAlpha()[0]*fBackRot); > ... > tpcAngleFront.SetX(FrontTrack_p->GetAlpha()[0]*fFrontRot); > ... > > By default the rotation is 1, so if you don't use this method you'll not > notice the change. But for example by setting > SetRotationFactors(1.01,1.01) in the ffs matching the dang vs p will be > much better. Ian and Flemming probably have some comments on this... > > 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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