Two-halo term
= Two-halo term
{title2=$P_{2h}$}
At linear order in halo correlations,
$$
P_{2h}(k)=
\left[\int dM\,\frac{dn}{dM}\frac{M}{\bar\rho}
b(M)\widetilde u(k|M)\right]^2P_{\rm lin}(k).
$$
= Two-halo term
{title2=$P_{2h}$}
At linear order in halo correlations,
$$
P_{2h}(k)=
\left[\int dM\,\frac{dn}{dM}\frac{M}{\bar\rho}
b(M)\widetilde u(k|M)\right]^2P_{\rm lin}(k).
$$