[Hps-analysis] followup on track pulls

Nelson, Timothy Knight tknelson at slac.stanford.edu
Wed Sep 27 12:35:37 EDT 2017


Agree… it looks like the only interesting thing is why the tails (beyond say +/-5) at low momentum are double,triple, or more what they are at high momentum.

Tim

> On Sep 27, 2017, at 9:25 AM, Graham, Mathew Thomas <mgraham at slac.stanford.edu> wrote:
> 
> 
> Here’s the second plot (which is z0 by the way) expanded to +/-10…here it’s easier to see that the red (p>0.55GeV) is marginally narrower than the mid (blue) and p<0.4GeV (black), but there’s no smoking gun here.   
> 
> <PastedGraphic-4.png>
> 
>> On Sep 27, 2017, at 9:43 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>
>>> 
>> 
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