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Re: Problem with PndKinVtxFitter and Ks decays [message #14247 is a reply to message #14245] Wed, 28 November 2012 15:18 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: *pool.mediaWays.net
Hello Albrecht,

From the fitter algorithm point of view I think it is not necessary that the composite mass resolution has to improve with a vertex fit, especiually with only two particles at hand. In principle these fitters adjust the momentum directions of the daughter particles.
Could you plot the dependence between the chi2 and the mass resolution?

Cheers
Ralf
 
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