dealing with long lived charged tracks ...

[Shankha Banerjee]

Dear Experts,

I am dealing with a scenario where I have a long lived charged track (a stau) and it mostly has lifetime longer than the detector length. However, I want to know how to include this particle. This particle possibly fakes a muon in the muon chamber. How to obtain this fake rate ?

Thank you very much.

Regards,

Shankha.

[Michele Selvaggi]

Hi Shankha,

you will not be able to predict the fake rate from Delphes. However, if you know it before hand we can parametrize it.

Michele

[Shankha Banerjee]

Hi Michele,

Thank you very much for your response. Say I have a long lived stau (stable for detector lengths) with PDG 1000015 and I say that it will fake a muon if its \beta (p/E) is > 0.95 say.

Is there an easy way to include it in the Delphes code.

Also should I have this line in the .tcl card :

# For long lived stau
add EnergyFraction {1000015} {0.0 0.0}

in the module Calorimeter Calorimeter { } ?

I will be very grateful if you can help me with these.

Regards,

Shankha.