Spin-Parity Analysis of the Low-Mass (1.1-1.4 BeV)K*πSystem inK−p→K¯*0π−pat 5.5 BeV/c

Abstract

We suggest a method of spin-parity analysis and apply it to low-mass $K^{*}\pi$ systems in $K^{-}p\to {\overline{K}}^{*0\mathrm{}}{\pi }^{-}p\to K^{-}{\pi }^{+}{\pi }^{-}p$ at 5.5 BeV/c. We find that the $K^{*}\pi$ system in each of the mass regions 1.1-1.2, 1.2-1.3, and 1.3-1.4 BeV is consistent only with $J^P=1^{+}$. We then determine the corresponding density-matrix elements, the strength of the $K^{*}$-helicity-0 componenent, and that of the $S$-wave component.