## Thursday, September 2, 2010

### CKM Again

The standard Euler parameters for the CKM matrix are (in degrees) very close to $13.01$, $2.39$ and $0.201$. Observe that these values are essentially the same as the three $R_2$ parameters $(a,b,c)$ $=$ $(0.231, 1/24, 0.0035)$, since these take the form $\tan \phi$. The difference is that the fourth phase parameter is now given as the product $abc$ of $R_2$ factors.

#### 1 comment:

1. So the Koide relation $2 / 24^2$ for the small parameter $c$ gives a prediction of $0.199$ for the third Euler angle, which is at the lower end of the range.