Rare decay modes of K∗(1420) and K∗(892)

A 2.5 standard deviation signal is observed for the decay K∗−(1420) → K∗−(892)π+π−. From this signal a partial width of 13.0 ± 5.0 MeV for the decay mode K∗(1420)→K∗(892)ππ is deduced under the assumption that the ππ system is in an I = 1 state. For the rare decay mode K∗(892)→Kππ no signal is observed. The following upper limits can be given for the decay widths: ΓK∗−(892) → K−π+π− < 40 keV, ΓK∗−(892) → K0π−π0 < 35 keV, ΓK∗0(892) → K0π+π− < 35 keV.