 Solution

ID: past-exam-of-the-particle-physics-course-of-the-university-of-oxford/2018/3/c/ii/solution

∣ q / p ∣ \neq = 1.

The flavour-transition probabilities are proportional to

∣ q / p ∣^{2} ∣ g_{-} ∣^{2}

for

K^{0} \to \overset{ˉ}{K}^{0}

, and

∣ p / q ∣^{2} ∣ g_{-} ∣^{2}

for the reverse. Their inequality remains when decay probability amplitudes themselves conserve CP. The coefficients multiplying the mixed-decay terms in the rate equations encode this asymmetry.

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