[Tdis] [EXTERNAL] Uncertainties

[Jan C. Bernauer]

Hi all,

I'm trying to understand the uncertainty budgets in the two proposals.

1) Looking at the kaon proposal, Fig  14 shows about 8.6% or so error 
for pions, and about 14% or so for kaons.

For pions, this meshes well with the total systematic error of 8.4%, 
with the difference from the statistical error. But shouldn't the 
systematic error for kaons be very similar? The count rates should be 3 
times lower, so the statistical error is still small and can't quite 
explain the difference I think.  Is the uncertainty in the kaon flux higher?

2) Table 9 (pion)/table 3 (kaon) says 6.5%, which is on the CS. If I add 
the 5% of the pion flux, I would end up at 8.2%, not 8.4%.

3) Same table also lists DIS electron cross section as 3% uncertainty. 
But according to section 1.2, we'll look at the ratio to F_2^p (or 
F_2^d  or F_2^n), which we measured. So wouldn't this 3% cancel?

Best,

Jan

-- 
Dr. Jan C. Bernauer
Assistant Professor
Department of Physics and Astronomy
Stony Brook University
Stony Brook, NY 11794-3800