Hi all,
as an illustration, I attach two pages from my Jan 24, 2002 BLAST Coll
talk on DGen and related issues. Page 11 summarises Chi's efforts
on smoothing out fL & Co, and highlights Zilu's comment on woes of the
"quasi-free ridges and dips". Already at that time, we knew the Mott
needs to be taken out in order to have safe interpolations. Chi's cbrt
version of splining shown in the figures worked just fine, and I was
convinced until this very day that it has been cemented into DGen,
and forgot about it, but now the issue popped up again.
Chi, can you please update us on that.
Simon
On Fri, 3 Sep 2004, Zilu Zhou wrote:
> one last comment for your benefit. it is not the mott cross-section term
> which is monotonic in q^2 giving troubles, it is all the f's made the
> quasi-free ridges and dips which give troubles for the interpolation
> of cross-sections and asymmetries. in the past, i found "linear" was
> safer but not accurate, "spline" was more accurate but not safe.
> but hey, whichever way, by now, you can do better.
-- Simon Sirca Dept of Physics, University of Ljubljana Tel: +386 1 4766-574 Jadranska 19 Fax: +386 1 2517-281 1000 Ljubljana, Slovenia
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