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GenaeTrackRep DetPlane [message #8630 is a reply to message #8580] Mon, 25 May 2009 11:34 Go to previous messageGo to previous message
asanchez is currently offline  asanchez
Messages: 350
Registered: March 2006
first-grade participant
From: *gsi.de
Dear Lia and Susanna,
I have one more question related to how one should define the
DefPlane in order to use geanetrakrep.

So far i know (please correct me if i'm wrong)
In Geane coordinates system, the direction of the
propagation is the X-axis, right??.

I have seen that in ( stt case ) PndSttPatternRecoTask2.cxx
class, you define the Detector plane in the Y--Z projection
so as to have the beam in the x--direction.

176 TVector3 u(0.,1.,0.);
177 TVector3 v(0.,0.,1.);
178 DetPlane pl(StartPos,u,v);
179
180 AbsTrackRep* rep = 0;
181 GeaneTrackRep *grep = new GeaneTrackRep(fPro,pl,StartMom,StartPosErr,StartMomErr,fCharge,pdg)
;

Is that general for all detectors, i mean, if one wants to use
GeaneTrackRep representation, should the detplane be defined
also in the Y--Z projection?

I say that, because for example, in the LSLTrackRep, the detplane
is defined as beeing in the X--Y projection.
TVector3 u(1.,0.,0.);
TVector3 v(0.,1.,0.);

Thank you in advance,
ALicia Sanchez.

 
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