P},q_4;-{\bf q})\nonumber\end{aligned}$$ where $\omega _{\mu \nu }=$diag$(-1,-1,-1,1)$ and $t$ denotes a matrix transpose. From the general form given in (\[2.6\]) and the first two expressions in (\[2.7\]), it is clear that $\Lambda ^{(2)}_{\mu
\nu }(P,q)$ and $\Lambda ^{(3)}(P,q)$ are even in both $P$ and $q$, while $\Lambda ^{(1)}_{\mu }(P,q)$ is odd in $P$ and even in $q$. The quantities $\Lambda ^{(i)}$ can therefore be written as $$\begin{aligned}
\Lambda^{(1)}_{\mu }(P,q)&=&\frac{q_{\mu }}{\eta }\frac{P\cdot
q}{q^2}\lambda ^L_1+\frac{P^T_{\mu}}{\eta }\lambda ^T_1,\nonumber \\
\Lambda ^{(2)}_{\nu \mu }(P,q)&=&\frac{P_{\nu }q_{\mu }}{\eta
^2}\frac{P\cdot q}{q^2}\lambda ^L_2+\frac{P_{\nu }P^T_{\mu }}{\eta
^2}\lambda ^T_2\label{2.8}\\
& &-\frac{q_{\nu }q_{\mu }}{q^2}\lambda ^L_3-\left( \delta _{\nu \mu
}-\frac{q_{\nu }q_{\mu }}{q^2}\right) \lambda ^T_3 + \frac{q_{\nu
}P^T_{\mu }P\cdot q}{\eta ^4}\lambda ^T_4,\nonumber \\
\Lambda ^{(3)}(P,q)&=&\lambda ^T_5.\nonumber\end{aligned}$$ Here the coefficients, $\lambda $, are functions of $P^2$, $q^2$, and $C^2_{Pq}$ where $C_{Pq}\equiv P\cdot q/(Pq)$ is the direction cosine between $P$ and $q$, and $P^T_{\mu }\equiv P_{\mu}-P\cdot qq_{\mu
}/q^2$ is the vector transverse to $q_{\mu }$ ($P^T\cdot q=0$). The behavior of the coefficients for large space-like $q^2$ consistent with asymptotic freedom[@marciano78] can be anticipated from (\[2.6\]) and (\[2.8\]). In particular, as $q^2\rightarrow \infty $ the coefficients $\lambda ^{T,L}_3$ must tend to unity, while all others tend to zero. The separation in (\[2.8\]) into longitudinal and transverse 