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Home » PANDA » PandaRoot » Fast Simulations » [FIXED] Problems with PndKinFitter::AddMassConstraint
Re: Problems with PndKinFitter::AddMassConstraint [message #16537 is a reply to message #16518] Wed, 07 May 2014 15:36 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
Hi Stefano.

Why should the mass after the fit be a delta peak? The fitter tries to match the constraint by adjusting the final state four-momenta within the errors in a linearized way. The fitted composites are then recalculated by that adjusted final state. As you can see the resolution is much better after the fit.

Cheers
Ralf

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