Abstract
High statistics data for the reaction K −p→K − π +n have been obatined using the LASS spectrometer at SLAC. An energy independent partial wave analysis of these data yields unique K − π + elastic scatering partila wave amplitudes in the K π invariant mass region from 0.7 GeV to 1.8 GeV, and two distinguishable sets of amplitudes between 1.8 GeV and 2.3 GeV. Besides the three “old” K ∗ resonances [J P = 1 − K ∗(892), 2 + K ∗(1430), 3 − K ∗(1780)] these partial waves display evidence for a K ∗ resonance with J P =4 + near 2.07 GeV. The energy dependence of the S wave amplitude confirms the existence of a resonant 0 + state in the 1.4 GeV region [the k(1500)], and provides evidence for a new high-mass S wave resonance [′'(1850)] near 1.85 GeV. Resonant behavior is also observed in the P wave amplitude around 1.7 GeV.
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