feynlag.pheno.loop.higgs_zgamma_width

feynlag.pheno.loop.higgs_zgamma_width(m_h, m_t, m_W, m_Z, v, alpha, sw2)

$Gamma(hto Zgamma)=frac{alpha^2 m_h^3}{512pi^3} left(1-frac{m_Z^2}{m_h^2}right)^3|mathcal A|^2$, with

$mathcal A=frac2vbig[cottheta_W A_1^{Zgamma}(tau_W,lambda_W) +N_c(2Q_t)frac{T_3^t-2Q_ts_W^2}{s_Wc_W}A_{1/2}^{Zgamma}(tau_t,lambda_t)big]$

($tau_i=4m_i^2/m_h^2$, $lambda_i=4m_i^2/m_Z^2$). Top + $W$ only.