[ee] SoLID TCS binning

[Zhiwen Zhao]

Dear All

We have been talking about binning SoLID TCS simulated data and examine 
its potential impact on model predictions.
There are some preference of using eta instead of s so I studied both.
The attached plots are Q2 VS t distribution of number of events in 6 eta 
bins or 6 s bins.
The Q2 and t coverage in each bin can seen from the plots.
In total, we have about 600k BH events assuming 1e37/cm2/s luminosity,50 
days of running, and 85% detector efficiency.
Each eta bin or s bin has about 35k events.
In each eta bin or s bin, we can further bin into Q2 and t for about 30 
bins so that each bin has at least 1k events and thus 3% statistical error.
I am not sure it's necessary to do all detailed binning now.
If I can have some input about where we plan to show some theory curves, 
I can produce data binning matches the prediction.

Thanks

Zhiwen
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