 Fermion mass matrix (source code)

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= Fermion mass matrix
{title2=$-\bar f_LM_ff_R+\mathrm{h.c.}$}

After a scalar <vacuum expectation value>, a <Yukawa matrix> produces a bilinear $-\bar f_LM_ff_R+\mathrm{h.c.}$. Independent unitary left/right <rotations> diagonalize $M_f$ with nonnegative <masses>. Extra scalar-dependent operators can make the physical scalar coupling matrix fail to diagonalize with the <mass> matrix.

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