Spin alignment of $K^{*}(892)^{\pm}$ mesons produced in neutron-carbon interactions

Abstract

A new precise measurements of spin density matrix element $\rho_{00}$ of$K^*(892)^{\pm}$ mesons produced inclusively in neutron-carbon interactions at\~60 GeV have been carried out in the EXCHARM experiment at the Serpukhovaccelerator. The values of $\rho_{00}$ obtained in the transversity frame are$0.424\pm0.011(stat)\pm0.018(sys)$ for $K^*(892)^+$ and$0.393\pm0.025(stat)\pm0.018(sys)$ for $K^*(892)^-$. Significant $P_T$dependence of $\rho_{00}$ has been observed in $K^*(892)^+$ production