Problems / Feedback: Event Display

[Soeren Stamm]

Hi,

I have a 2 bug reports and some feedback on the Event Display.
(sorry for putting everything into one ticket, I hope it's okay...)

I was following the guide on your webpage:
https://cp3.irmp.ucl.ac.be/projects/delphes/wiki/WorkBook/EventDisplay

Bug 1:
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With Delphes 3.4, the Calorimeters in the ATLAS Card changed from "Calorimeter" to "ECal" and "HCal" (I guess the same is true for CMS). Therefore the example script is out-dated.

The default parameters of the script should be (?)

const char *Calorimeters = "ECal,HCal"

instead of "Calorimeter". With this change, the example runs out-of-the box.

Bug 2: The MissingET is not displayed in the EventDisplay.
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In "display/DelphesBranchElement.h", in the constructor of DelphesBranchBase, maxPt_ is not initialized, ("maxPt_(maxPt)" is missing)

The constructor should be:

DelphesBranchBase(const char* name="", TClonesArray* branch=NULL, const enum EColor color=kBlack, Float_t maxPt=75.):name_(name),maxPt_(maxPt),branch_(branch),color_(color) {}

Then the missing Et vector is drawn, which brings me to my feedback:

Feedback:
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The event display is very good in general. I only have a small issue regarding the missing et.

The TEveArrow class is not projectable. (it does not inherit from TEveProjectable). Therefore, it does not appear in the RPhi view, which is unfortunate.

I would like to have the MissingET displayed as a photon, i.e. as dashed line. I did some testing and I replaced the TEveArrow class with a TEveTrack class.

I attached a screenshot of the modified Event Display and the code that I used. The advantage is, that it is visible in the RPhi view. It might be hard to recognize in the 3D view, but this is also true for photons.

Cheers,
Soeren

[Soeren Stamm]

Code for EventDisplay: MissingET as dashed track

[Pavel Demin]

Hi Soeren,

Many thanks for your feedback!

The bugs are fixed and TEveArrow is replaced with TEveTrack with the following commits:
2d8821c92efaf16a2855168b8beacd13ffa63846/git
7066f9c64a7a3d3e1818637cc48468e590b90958/git
273735da3c93e15993ad2d032a92595bc5ab6259/git

Since the MissingET branch contains only one entry, I've replaced while with if.

Best regards,

Pavel