GSI Forum
GSI Helmholtzzentrum für Schwerionenforschung

Home » PANDA » PandaRoot » Analysis » No back propagation to IP for V_0 reconstruction
Re: No back propagation to IP for V_0 reconstruction [message #17632 is a reply to message #17611] Thu, 04 December 2014 12:10 Go to previous messageGo to previous message
Ralf Kliemt is currently offline  Ralf Kliemt
Messages: 507
Registered: May 2007
Location: GSI, Darmstadt
first-grade participant

From: *gsi.de
Hi Donghee,

I agree with Stefano: You need to do a vertex fit to get the proper momentum directions of the pions. What it does is to find the position along the tracks (helices) where the momentum is tangent. Where your momentum is defined before you give it to the fit does not matter that much. If you want to use the pions defined as they were right after the Kalman filter you may simply use

PndAnalysis::ResetCandidate(RhoCandidate*) or PndAnalysis::ResetDaughters(RhoCandidate*) .

e.g.:
(theAnalysis->ResetDaughters(kshort);)


Cheers
Ralf

 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Vertex fitter for two consecutive decays
Next Topic: Efficiency reduction of antiprotons above 20 degrees
Goto Forum:
  


Current Time: Sun Nov 10 03:47:08 CET 2024

Total time taken to generate the page: 0.00574 seconds