[d2n-analysis-talk] PR E/p Cut Efficiency Problem Solved (corrected?)

[Brad Sawatzky]

On Mon, 22 Mar 2010, David Flay wrote:

> During our last meeting, I noted an issue with the p = 0.60 GeV kinematic
> -- in particular, that the calculated E/p cut efficiencies in the PR were
> not consistent in going from 4- to 5-pass data.
[ . .  ]
> (Such issues of leaving out data has caused me to go back and litter my
> code with flags that will kill the program if there is anything in the
> slightest that is not right...)

Defensive programming is a very good plan.

> Subsequently, I've gone back and put this data in, which gives the two
> plots I've attached.  Indeed, the p = 0.60 GeV data is consistent across
> both beam energies.  I do believe that the visible <slight> drop in
> efficiency for both of these -- with respect to the other data sets -- is
> due to the wider (larger width) electron distributions in E/p, in which
> case, the lower efficiency does make sense, even with the background
> correction.  Hence, it's tied to the resolution of the PR at this point.
> 
> Overall, I think the results of the study are pretty solid.
> 
> Any comments or concerns?  Thanks,

Your new plots look pretty goood.  Well done.

-- Brad


-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
        Ph: 757-269-5947        -<>-        Fax: 757-269-5235
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov