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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

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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[Message index]

		Problem with PndKinVtxFitter and Ks decays By: 2dd180b0 on Wed, 28 November 2012 13:01
		Re: Problem with PndKinVtxFitter and Ks decays By: Ralf Kliemt on Wed, 28 November 2012 13:14
		Re: Problem with PndKinVtxFitter and Ks decays By: Albrecht Gillitzer on Wed, 28 November 2012 14:09
		Re: Problem with PndKinVtxFitter and Ks decays By: Ralf Kliemt on Wed, 28 November 2012 15:18
		Re: Problem with PndKinVtxFitter and Ks decays By: 2dd180b0 on Wed, 28 November 2012 14:13

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