Does $K_L-K_S$ mass difference constraints or \\ claims new physics beyond the Standard Model?

Abstract

The ratio $\Delta m_K/m_K$ within the standard model with 3 generations is calculated as a function of the CP nonconserving phase ${\delta }_{13}$ and the quark masses $m_c,m_t$ assuming the current values of the Cabibbo-Kobayashi-Maskawa mixing angles. We have found that varying ${\delta }_{13}$ and $m_c$ within the allowed range, not all the values for the top quark mass fit the experimental value for that ratio.

Revtex, 9 pages (one figure avalaible on request), IFT-P.027/93