[Frost] How do you find the dilution factor?

[Michael Dugger]

Sung,

I have been using the subtraction method, so there might be some problem 
with my understanding on how these dilution factors are put together and 
used.

I could be wrong, but I think that your definition of the dilution factor 
might be inverted with respect to what I see on the helicity web page:
http://clasweb.jlab.org/rungroups/g9/wiki/index.php/Helicity_assignment_for_g9a
Also there might be a sign problem.

You might want to define how you are using the dilution factor. For 
example:

E = (1/(D*P))*[N_a - N_b]/[N_a + N_b],

Or

E = (D/P)*[N_a - N_b]/[N_a + N_b],

where
D = dilution factor
P = beam*target polarizations
...etc

-Michael

On Fri, 25 Feb 2011, Sungkyun Park wrote:

> Hi Jo,
>
> In your update, I have a simple question.
> How do you find the Dilution Factor?
>
> I define the dilution factor as the ratio between the hydrogen and the full butanol contribution to the cross section. I used the following equation:
>
> (Dilution factor) = 1 - N(carbon)/N(Butanol)*(Scaling Factor)
> where N(carbon) is the number of event in carbon and I count the events in the missing mass plot of carbon. N(Butanol) is the number of event in buutanol.
>
> Sung
> Florida State University
>