22 | | \begin{eqnarray} |

23 | | \mathcal{L}_{N~\text{Int.}} &=& -\frac{g}{\sqrt{2}}W_{\mu}^{+}\sum_{\ell=e}^{\tau} \overline{N^{c}}V_{\ell N}^{*}\gamma^{\mu}P_{L}\ell^{-} |

24 | | \\ |

25 | | & &-\frac{g}{2\cos\theta_W}Z_{\mu}\sum_{\ell=e}^{\tau} \overline{N^{c}}V_{\ell N}^{*}\gamma^{\mu}P_{L}\nu_\ell |

26 | | \\ |

27 | | & & -\frac{g m_N}{2 M_W} h \sum_{\ell=e}^{\tau} \overline{N^{c}}V_{\ell N}^{*}P_{L}\nu_\ell |

| 22 | \begin{equation} |

| 23 | \mathcal{L}_{N~\text{Int}} = |

| 24 | -\frac{g}{\sqrt{2}} W_{\mu}^{+}\sum_{\ell=e}^{\tau} \overline{N}V_{\ell N}^{*}\gamma^{\mu}P_{L}\ell^{-} |

| 25 | -\frac{g}{2\cos\theta_W}Z_{\mu}\sum_{\ell=e}^{\tau} \overline{N}V_{\ell N}^{*}\gamma^{\mu}P_{L}\nu_\ell |

| 26 | -\frac{g m_N}{2 M_W} h \sum_{\ell=e}^{\tau} \overline{N}V_{\ell N}^{*}P_{L}\nu_\ell |