I am trying to calculate box diagram of Kaon mixing by follow the "CP Violation" book.(adsbygoogle = window.adsbygoogle || []).push({});

Now, I arrived at equation (B.8) and I have problem with getting equation (B.12).

[tex]F(x_\alpha,x_\beta)=\dfrac{1}{(1-x_\alpha)(1-x_\beta)}(\dfrac{7x_\alpha x_\beta}{4}-1)+\dfrac{x_\alpha^2lnx_\alpha}{(x_\beta-x_\alpha)(1-x_\alpha)^2}(1-2x_\beta+\dfrac{x_\alpha x_\beta}{4})+\dfrac{x_\beta^2lnx_\beta}{(x_\alpha-x_\beta)(1-x_\beta)^2}(1-2x_\alpha+\dfrac{x_\alpha x_\beta}{4})[/tex]

I got a lot of terms with high order of m_{W}(m_{W}^{2}, m_{W}^{4}, m_{W}^{6}, ...) while there is no m_{W}term in the book.

I checked the integral over Feynman parameter twice.

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# A Box diagram calculation (Kaon mixing)

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