在BESII处观察到J/psi -> K*（892）-+Kspi+-、K*（892）-+ -> Kspi-+中的带电κ
Observation of charged kappa in J/psi -> K*(892)-+Kspi+-, K*(892)-+ -> Kspi-+ at BESII
摘要：
利用BESII获得的5800万J/psi衰变，在分析Kspi ~+-系统反冲K ~*（892）~-的过程中，观察到一个带电的κ粒子，其中K ~*（892）~-在J/psi ~-> KsKspi+pi ~-中选择。带电卡帕的质量和宽度值为：（826+-49_{-34}^{+49}）MeV/c^2和（449 ± 156_{-81}^{+144}）MeV/c^2（Breit-Wigner参数），测得极位为（764+-63-{-54}^{+71}）-i（306+-149-{-85}^{+143}）MeV/c^2。它们与北京谱仪合作观测到的中性kappa值吻合得很好。
英文摘要：
Using 58 million J/psi decays obtained by BESII, a charged kappa particle is observed in the analysis of the Kspi+- system recoiling against K*(892)-+ selected in J/psi -> KsKspi+pi-. The mass and width values of the charged kappa are obtained to be (826+-49_{-34}^{+49}) MeV/c^2 and (449+-156_{-81}^{+144}) MeV/c^2 for the Breit-Wigner parameters, and the pole position is determined to be (764+-63_{-54}^{+71})-i(306+-149_{-85}^{+143}) MeV/c^2. They are in good agreement with those of the neutral kappa observed by the BES collaboration.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
