Hi Ian
> I have been looking a bit at the RICH to help understand the momentum
> problems.
> When you plot Radius vs. momentum, is the momentum from D4, or is it the
> average of D3 and D4 momenta?
It's the momentum I get from the Bfs Tracks. I looked up how this is
calculated in BrBfsTrackingModule, and this is what I found:
// momentum: there might be a better way to set
// the momentum by weighting with quality factor
Double_t BfsMom = (d4P + d3P)/2.;
trk->SetMomentum(BfsMom);
So the momentum is just the average of D3 and D4 momenta.
> How did you
> determine the index of refraction, which is set to 1.002 in the software I
> stole from you.
I just found the n that fitted the data best, but is probably varies from
run to run.
> Also, the software is really nice. Thanks!
You're welcome!
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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