[Hps-analysis] followup on track pulls

[Nelson, Timothy Knight]

Why are these cut off at +/-5?  The difference is only apparent in the 2-d plots in the tails beyond that.

> On Sep 27, 2017, at 8:43 AM, Graham, Mathew Thomas <mgraham at slac.stanford.edu> wrote:
> 
> Here are the projections in low, mid, high bins of momentum (normalized to integral=1) for slope and z0.  No labels on the plots because it doesn’t matter,  widths are basically the same.  
> <PastedGraphic-1.png>
> 
> <PastedGraphic-2.png>
> 
> 
>> On Sep 27, 2017, at 8:34 AM, Nelson, Timothy Knight <tknelson at slac.stanford.edu> wrote:
>> 
>> Hey Matt,
>> 
>> I’m not so sure there is *nothing* to see there.  The width is certainly correlated with Pz in the s-z view (impossible to quantify by eye - sliced fits or just a profile would flesh this out) and there are trends in the tails of the r-phi view (looks interesting but not too serious).
>> 
>> T
>> 
>>> On Sep 27, 2017, at 7:00 AM, Graham, Mathew Thomas <mgraham at slac.stanford.edu> wrote:
>>> 
>>> <electron-all-trkpar-vs-Pz-newcalc-pull.pdf>
>> 
>