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Changes between Version 15 and Version 16 of WorkBook/Tutorials/Student


Ignore:
Timestamp:
09/09/19 14:24:56 (13 months ago)
Author:
mselvaggi
Comment:

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  • WorkBook/Tutorials/Student

    v15 v16  
    7777- The provided data corresponds to LHC events that contains at least two isolated leptons (lepton=electron/muon) with pT > 15. Prove it!
    7878
    79 - The data contains the equivalent of an integrated luminosity of 60 pb-1. I presents an excess corresponding to a new physical state. Find the observable that makes this excess explicit.
     79- The data contains the equivalent of an integrated luminosity of 60 pb-1. It contains an excess corresponding to a new physical state. Find the observable that makes this excess explicit.
    8080
     81- What is the new particle's mass?
    8182
     83- What does it decay into?
    8284
     85- For each decay channel define an event selection (the signal region) that maximises the significance of observation of this new state. 
     86
     87- For each decay channel, express the cross section times branching ratio as a function of the number of observed events (Nobs) and the number of background events (Nb) in the signal region, the integrated luminosity (L) and the event selection efficiency.
     88
     89- How would you measure the background yield (Nb) from this data sample?
     90
     91- How would you measure the signal efficiency?