[Color_transp] [EXTERNAL] tracking efficiency and hcana's InsideDipoleExit branch

[Dipangkar Dutta]

Hi John,
Yes, that should be good, this is exactly what we are trying to do, ie
pruning away events that we know will produce bad tracks (since those bad
tracks are never part of our good event sample).
Nonetheless, I think we should certainly check the difference in the
tracking eff, with and without the dipole exit cut (removing it from both
should and did when not using dipole cut) and see how large of a difference
it makes.
Cheers
Dipangkar



On Mon, Jul 27, 2020 at 5:34 PM John Matter <jcm6fv at virginia.edu> wrote:

> Hi all,
>
> hcana uses the golden track's info to set InsideDipoleExit to true or
> false. See the lines around 655 in the link below
>
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_johnmatter_hcana_blob_59652700d08f10949e0d9b399ff4f70ddc9debf5_src_THcDC.cxx-23L655&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=XtVl8BY42jbbWh0Vu1ygqgFBYEJMENirtKAh3P_9ayw&m=CTywsv7JKIkP695iouIQPSqbKRphBqn7OYycWnVRJPE&s=-scoJkAvoncGiKbfeziNy71ZCk4BfGa2b72l3nFkcDA&e= 
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_johnmatter_hcana_blob_59652700d08f10949e0d9b399ff4f70ddc9debf5_src_THcDC.cxx-23L655&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=XtVl8BY42jbbWh0Vu1ygqgFBYEJMENirtKAh3P_9ayw&m=kF3mY6QmwY_-Rg5eY5m6mmZxjdJEPeVOPJS_SEMYkf4&s=9v81oaJV1KKk1V6RphcE43IB39Bf34QS_UAhcXzlQb0&e=>
>
> InsideDipoleExit is initialized to true on line 512. So using
> "inside==true" in the "should" cut fortunately won't exclude ntrack==0
> events from the "should" count.
>
> However, it will exclude some events (ntrack>0 events with golden tracks
> outside the dipole exit) from both the "should" and "did" counts. Is this
> what we want?
>
> - John
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