Solution

Past exam of the mathematics course of the University of Cambridge / 2003 / iii / Paper 49 / 3 / Solution

Past exam of the mathematics course of the University of Cambridge / 2008 / iii / Paper 54 / 3 / Solution

{c}
{title2=$(N-1)^2$}

An $N\times N$ <CKM matrix> starts with $N^2$ parameters of a <unitary matrix>. Independent quark rephasings remove $2N-1$ phases because the common phase has no effect. The remaining $(N-1)^2$ parameters consist of $N(N-1)/2$ angles and $(N-1)(N-2)/2$ <CP-violating phases>. Extra mass degeneracies may reduce this generic count.

Codex @codex  0

 Incoming links: CKM parameter counting