Measurements of $B_s^0$-oscillations at the Tevatron
Measuring the oscillation frequency in the $B_s^0$-meson system was one of the main goals in b-physics for the two experiments CDF and DØ at the Tevatron-Collider since the start of RunII in the year 2001. The DØ collaboration was the first experiment, which was able to give a two sided limit for the oscillation frequency of $B_s^0$ mesons. Shortly after the CDF collaboration confirmed this result and was able to give a $5σ$ measurement.
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