[Tpe] efficiencies for inbenders and outbenders

[Brian A Raue]

Mac,
	Let me at least partially address your question.  First, we can only 
estimate efficiency for in- vs out-benders.  If you recall the figures I 
sent out previously that showed the e+/e- ratio for real data and GSIM 
data both showed torus-polarity dependencies that varied by up to 
20-30%.  We also showed that this polarity dependence is removed with 
our double ratio method.
	We have also looked at the sector dependence of the double ratio 
(attached figure).  The figure shows e+/e- as a function of epsilon with 
each sector ratio plotted separately.  They are offset in epsilon so you 
can distinguish the points.  The black lines are data for all sectors 
combined where the bands represent the statistical error.  You can see 
that the spread in the individual-sector data about the combined-sector 
data points appears to be statistical in nature.  There is also no 
indication that any one sector produces a systematically high or 
systematically low double ratio.

Brian

Mac Mestayer wrote:
> Folks;
> 
> Rob Bennett tells me he'll be working on trying to
> understand the root cause of the different efficiencies
> for inbenders and outbenders.
> 
> My first question to him was: to what extent does the
> effect change sector-to-sector?  Particular hardware
> malfunctions will be sector dependent; problems with
> B-field or tracking algorithms will probably be independent
> of sector.
> 
>  			my two cents, Mac
> 
> "mestayer at jlab.org", (757)-269-7252
> 
> _______________________________________________
> Tpe mailing list
> Tpe at jlab.org
> https://mailman.jlab.org/mailman/listinfo/tpe


-- 
****************************************************************
Dr. Brian A. Raue
Graduate Program Director
Department of Physics			Office: 305-348-3958
Florida International University	Lab: 305-348-6039
University Park				Fax: 305-348-6700
Miami, FL 33199

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