Contribution to MissingET, calculating dPhi and M_T

[SAUMYEN KUNDU]

Hi,

I am working in an effective model with processes like : e-e+ -> photon + (new particle pair). Now the 'new particle pair's are massive and contributes to missing energy.
Now as my summary suggests, I have three queries or confusions.

1. To include the new particles as the missing energy I added the following line in module ECal and HCal:

     add EnergyFraction {6000005} {0.0 0.0}
   

and in the module Neutrino Filter, the following lines:

  add PdgCode {6000005}
  add PdgCode {-6000005}

But the output is the same as without modifying the card. Is it normal or I am missing something?

2. Since the new particles are massive, I will be interested in the quantity M_{T}. Now how do I measure the quantity?
3. I am particularly interested in the quantity E^{miss}_{T}*Cos(dPhi(E^{miss}_{T},P^{photon}_{T})). Is it possible to get this quantity from the ROOT file generated by Delphes?

I am using the ILD card on the hepMC file.

It will be very helpful if you can give some idea on these.

Regards,
Saumyen

[SAUMYEN KUNDU]

Hi,

In case the third point was not clear enough. The quantity I mentioned is the same as the one reported in ​https://arxiv.org/pdf/1211.6096.pdf (page-11) or ​https://arxiv.org/pdf/1212.3352.pdf (page-3) with needful modifications. Is the argument of cosine function just the difference between the Phi's, like (MissingET.Phi-Photon.Phi) or something else?

And, regarding the first point, by 'same' what I meant is depicted in the screenshot attached herewith.

Regards,
Saumyen

[SAUMYEN KUNDU]

Difference between the two output.

[Davidkibler]

The work of Implementation of Track based MET algorithm in official MissingET reconstuction package is on going.