Hi Wally,

Wally Melnitchouk wrote:
> 
> I'm traveling in Europe at the moment - I'll get back to you when I
> return to JLab on Wednesday.

Thank you, I will look forward to your reply. I have one new question:

If I substitute the expressions for F1 and F2 inelastic scaling SSF's from your
eq. 1a, b (PRL 86), or equivalently, W_1^el , W_2^el from eq. 12.3.17 of Leader
and Predazzi (ref. 15 of your hep-ph/0006170,) in the equation for the ratio of
the longitudinal to transverse cross sections:

R = sig(L)/sig(T) = [1+(E-E')^2/Q^2](W_2^el/W_1^el) - 1,

I get R(x=1) = 1/tau (GE/GM)^2.

But this seems wrong, because at Q^2=0 R must be 0, but here I get R(Q^2=0) =
infinity, since GE, GM(Q^2=0) are finite, non-zero. Can you explain what is
going on?

Thank you again,

Oscar