[d2n-analysis-talk] PR E/p Calibration

[Brad Sawatzky]

On Tue, 27 Oct 2009, David Flay wrote:

> I've attached a plot of the position of E/p as a function of momentum.
> Since we do not have a full shower, I don't expect the value to be around 1,
> however there is a clear momentum dependence -- I was expecting just the
> opposite trend shown here.  Shouldn't the E/p value be greater at lower
> momentum, since the particles are depositing most (if not all) of their
> energy in the PR (for p = 0.6, say)?  But, this trend suggests that I'm
> getting larger energy deposition at higher momentum?

I agree, the trend in the plot isn't what I expected.  At one point you
had some corrections in your code to get E/p centered on 1 for all
energies -- are you sure those (old) corrections aren't still being
applied somehow?

-- Brad

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Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
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