Re: updated systematics table

[Frederick Gray <Frederick.Gray@pomona.edu>]

Peter Kammel wrote:
> Dear Tom, Steve and Fred,
>
> Tom and Steve presented an updated systematics table at the
> unblinding meeting. I think, Fred updated his error estimates
> based on his recent work.
>
Hi, Peter et al.,

The number in my analysis report that I do not expect to change is:
  -  muSR parameters: 0.4 Hz

There are several systematics that should be equal for the mu+ and mu- 
experiments that I have not independently quantified.  We should take 
from Tom and Steve's studies entries for (in the terminology of Peter's 
DNP talk)
  - mu stop definition
  - pileup
  - detector combination
  - clock (which I need to update, but any change is not expected to be 
large)

I am inclined to believe that the entry for "time dependent background" 
should simply go away, since I have shown that it was an artifact of the 
strange fitting procedure.  The remaining question is whether it should 
be replaced with something else to account for the difference between 
the impact-cut and non-impact-cut results (which, as expected, does not 
change much when I use the fit to the summed data rather than the 
average of the fits--it goes from 12.1 Hz to 11.0 Hz).

On another topic: I expect to send out an outline of the paper by the 
end of the day tomorrow.

Thanks,

-- Fred

> It is important for the collaboration to step through these
> tables with great care.
>
> Before doing that, I would like to ask you, what is the latest
> update on that.
> Should I just take the tables presented and check in the
> analysis report for the sources of these numbers?
>
> Or are you planning an updated summary with either a short
> discussion of the source for each number or simply a
> reference to a page on your analysis report?
>
> Clearly we are still working on some of these numbers. In
> the meantime, however, it would be helpful to collect
> and document what you consider final.
>
> Please suggest the best procedure to bring that to a closure.


-- 
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Frederick Gray, Visiting Assistant Professor
Department of Physics and Astronomy, Pomona College, Claremont, CA, USA
Frederick.Gray@pomona.edu / phone: 909-607-9795 / fax: 909-621-8463
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