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The charged lepton flavor violation process is a clean and sensitive probe of new physics beyond the Standard Model. A sensitivity study is performed to the process τ-→γμ- based on a 3 fb-1 inclusive Monte Carlo sample of e+e- collisions at a center-of-mass energy of4.26 or 4.6 Ge V, in the framework of the BESIII software system. The 90 % confidence level upper limits on B(τ-→γμ-) are estimated assuming no signal is produced. We also obtain the sensitivity on B(τ-→γμ-) as a function of the integrated luminosity, to serve as a reference for the HIEPA being proposed in China. It is found that 6.34 ab-1 are needed to reach the current best upper limit of 4:4 10-8 and about 2510 ab-1 are needed to reach a sensitivity of 10-9 if the detector design is similar to that of BESIII. 相似文献
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柳宏 《长春师范学院学报》2000,19(5):58-60
本从多媒体教育和传统教学之间的对比看比媒体教学的先进性。多媒体教学以其多媒共生性,交互性,个别辅导性,以及互联网络资源的丰富和快捷性将成为未来教学发展的方向。 相似文献
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介绍了基于微机的非标复杂刀具CAD \CAE \CAM集成系统 ,对集成的机理、实现框架和实施策略等方面进行了研究与探讨 相似文献
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在$^3P_0 $模型框架下, 计算$\Lambda _{c} (2880)^+$作为2D波激发态的衰变宽度和分支比, 确定其量子态并探究内部激发模式. 计算结果表明: $\Lambda _{c} (2880)^+$有可能是2D激发态$\Lambda _{{c}2} \big(\frac{3}{2}^+\big)$, $J^P=\frac{3}{2}^+$, 且$n_\rho =1$、$l_\lambda =2$, 为径向$\rho $激发、轨道$\lambda $激发的激发模式, 总衰变宽度${\it\Gamma}_{total} =18.53$ MeV, 分支比比值$R={\it\Gamma}(\Lambda _{c}(2880)^+\to \Sigma _{c}(2520)\pi)$/${\it\Gamma}(\Lambda _{c} (2880)^+\to \Sigma _{c} (2455)\pi)=0.16$; 也可能是2D激发态$\Lambda _{{c}2}^{'}\big(\frac{3}{2}^+\big)$, $J^P=\frac{3}{2}^+$, 且$n_\lambda =1$、$l_\lambda =2$, 为径向$\lambda $激发、轨道$\lambda $激发的激发模式, 总衰变宽度${\it\Gamma} _{total} =1.69$ MeV, 分支比比值$R={\it\Gamma}(\Lambda _{c} (2880)^+\to \Sigma_{c}(2520)\pi )$/${\it\Gamma} (\Lambda_{c} (2880)^+\to \Sigma_{c}(2455)\pi )=0.10$. 相似文献
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