The kaon mixing parameter has magnitude and phase .

PHYSICS · Multi-part · Fermi University Physics · Particle Physics & Quantum Fields · Flavour, neutrinos and CP violation · Flavour, neutrinos and CP violation

Symmetry and Flavour, Ch Neutral kaons: mixing, strangeness oscillation and CP violation

Problem

The kaon mixing parameter has magnitude ∣ϵ∣=2.228×10−3|\epsilon| = 2.228\times10^{-3} and phase ϕϵ=43.5∘\phi_\epsilon = 43.5^\circ. ((a)) Compute Re ϵ\mathrm{Re}\,\epsilon. ((b)) Use δL=2 Re ϵ/(1+∣ϵ∣2)\delta_L = 2\,\mathrm{Re}\,\epsilon/(1+|\epsilon|^2) to compute the predicted KLK_L semileptonic charge asymmetry. ((c)) Compare your value with the measured δL=(3.32±0.06)×10−3\delta_L = (3.32\pm0.06)\times10^{-3}, expressed as a number of standard deviations.

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