标题： 关于Upsilon和J/Psi共振的不可见衰变 显示英文标题

标题： On the invisible decays of the Upsilon and J/Psi resonances

摘要： 我们估计了夸克偶素态不可见衰变分支比的最重要修正，这些修正来自于标准模型可能的扩展。 考虑到的可能性包括额外Z玻色子的存在、具有R宇称破坏的最小超对称标准模型扩展，以及向金斯蒂诺的衰变。 讨论了在现有和未来的B介子工厂和τ- charm工厂检测这些修正的前景。 显示英文摘要

摘要： We estimate the most important corrections to the branching ratios for the invisible decays of quarkonium states, arising from possible extensions of the standard model. Among the possibilities considered are the presence of extra Z-bosons, minimal supersymmetric extensions of the standard model with R-parity violation, and decays into goldstinos. Prospects of detecting these corrections at existing and future B-factories and tau-charm factories are discussed.