The K−π+ S-wave from the D+→K−π+π+ decay

Abstract

Using data from FOCUS (E831) experiment at Fermilab, we present a model independent partial-wave analysis of the Kπ+ S-wave amplitude from the decay D+→ Kπ+π+. The S-wave is a generic complex function to be determined directly from the data fit. The P- and D-waves are parameterized by a sum of Breit–Wigner amplitudes. The measurement of the S-wave amplitude covers the whole elastic range of the Kπ+ system.

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