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Cp Violation
Linked via "$B_s$ mesons"
$$A = \frac{\Gamma(X \to f) - \Gamma(\bar{X} \to \bar{f})}{\Gamma(X \to f) + \Gamma(\bar{X} \to \bar{f})}$$
For example, in the decay of $Bs$ mesons into two muons, the parameter $A{SL}$ probes $CP$ violation in the mixing sector, yielding values consistent with the small SM prediction, reinforcing the need for BSM sources to explain the cosmological asymmetry [6].
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