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

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

2000-02-21

arxiv.org/abs/hep-ex/0002054v1

Phys.Lett.B485:334-340,2000

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, LaTeX, 3 eps figures

Scientific paper

10.1016/S0370-2693(00)00704-8

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 Serpukhov accelerator. 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.

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