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Re: Vertex Fitter in Fast simulation [message #16418 is a reply to message #16125] Wed, 23 April 2014 10:01 Go to previous message
Ralf Kliemt is currently offline  Ralf Kliemt
Messages: 500
Registered: May 2007
Location: GSI, Darmstadt
first-grade participant

From: *gsi.de
Hi,

Yes, the jacobian is now from (p,theta,phi) to (px,py,pz,e) for charged particles and from (e,theta,phi) to (px,py,pz,e) for gammas.

You may want to try PndKinFitter and set more constraints. No warrenty here. However, our kinematic fitters fit the input node of the decay with all the final state particles. No intermediate decay is considered.
To circumvent that you can apply Lock() (and UnLock()) to a composite candidate. The fitters will then treat it as a final state particle. You'd be the first one to apply that feature. See RhoFitterBase for details.

Cheers
Ralf
 
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