[Tpe] efficiencies for inbenders and outbenders

[Mac Mestayer]

Hello Brian;

Yes, your double ratio is a great thing; it can hide (fix?)
huge problems, but it would be nice to understand them.
So, do your torus-polarity depencies show a sector dependence?

 			- Mac

"mestayer at jlab.org", (757)-269-7252

On Tue, 3 Aug 2010, Brian A Raue wrote:

> 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
>> 
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>
>
> -- 
> ****************************************************************
> 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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