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Appendix A

Decay rates and asymmetries in the case of a violating interaction:

In the framework of the standard model and because of the rule:

Let us define:

We measure four rates:

1. : at and decay to at time t:

2. : at and decay to at time t:

3. : at and decay to at time t:

4. : at and decay to at time t:

In the case of the two decay rates forbidden by the rule ( and , we neglected the terms proportional to and , which are only important at short decay times .

is a sign of direct violation in the semileptonic decay amplitude. It is difficult to distinguish this effect from differences in the and decay rates due to different and tagging efficiencies and for the following we assume .

with and


Thomas Ruf
Fri Aug 9 14:24:14 MET DST 1996