What if the mass difference Delta M_s is around 18 inverse picoseconds?

Present experiments in pursuit of the mass difference in the system have put a lower bound on this quantity of (at 95% C.L.). The same experiments also yield a local minimum in the log-likelihood function around , which is away from being zero. Motivated by these observations, we investigate the consequences of a possible measurement of , in the context of both the standard model and supersymmetric models with minimal flavor violation. We perform a fit of the quark mixing parameters in these theories and estimate the expected ranges of the CP asymmetries in B decays, characterized by and , the interior angles of the CKM-unitarity triangle. Based on this study, we argue that, if indeed turns out to be in its currently-favored range, this would disfavor a large class of supersymmetric models. Indeed, of all the models examined here, the best fit to the data occurs for the standard model. Received: 14 December 2000 / Published online: 23 January 2001     

反射相移对Faraday电流传感器灵敏度及稳定性影响的理论分析

光学法拉第电流传感器内的反射相移能降低传感器的灵敏度与稳定性。本文对此效应给予了定量的理论分析。