Comments on Likelihood fits with variable resolution

Abstract

Unbinned likelihood fits are frequent in Physics, and often involve complex functions with several components. We discuss the potential pitfalls of situations where the templates used in the fit are not fixed but depend on the event observables, as it happens when the resolution of the measurement is event--dependent, and the procedure to avoid them.

Talk from PhyStat2003, Stanford, Ca, USA, September 2003, 3 pages, LaTeX, 4 eps figures. PSN WELT002

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