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Home » PANDA » PandaRoot » Fast Simulations » [FIXED] Problem with mass constraint fit for two gamma
Re: Problem with mass constraint fit for two gamma [message #16959 is a reply to message #16956] Mon, 07 July 2014 13:54 Go to previous messageGo to previous message
donghee is currently offline  donghee
Messages: 385
Registered: January 2009
Location: Germnay
first-grade participant
From: *kph.uni-mainz.de
Hi Dima and Stefano,

Error matrix in the contructuion of nuetral candidate has a form with 7X7 matrices in total 3 categories.

I have seen/learn follow setting for neutral cand. with PndPidCandidate.
position error set to be 0.
position-momentum covariance set to be also 0.
momentum(px,py,pz,E) error has been evaluated by module and cluster.

I am wondering the term in position-momentum covariance must be 0 for neutral case? or I am now misunderstanding for this concept.

Best wishes,
Donghee
 
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