Changes between Version 18 and Version 19 of WorkBook/Tutorials/Student

Timestamp:

Sep 9, 2019, 3:11:02 PM (5 years ago)

Author:

Michele Selvaggi

Comment:

--

WorkBook/Tutorials/Student

@@ -75 +75 @@
 == 2) Characterisation of a BSM excess
 
-- The provided data corresponds to LHC events that contains at least two isolated leptons (lepton=electron/muon) with pT > 15. Prove it!
+a) The provided data corresponds to LHC events that contains at least two isolated leptons (lepton=electron/muon) with pT > 15. Prove it!
 
-- 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. 
+b) 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. 
 
-- What is the new particle's mass? 
+c) What is the new particle's mass? 
 
-- What does it decay into?
+d) What does it decay into?
 
-- For each decay channel define an event selection (the signal region) that maximises the significance of observation of this new state.  
+e) For each decay channel define an event selection (the signal region) that maximises the significance of observation of this new state.  
 
-- 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. 
+f) 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. 
 
-- How would you measure the background yield (Nb) from this data sample? 
+g) How would you measure the background yield (Nb) from this data sample? 
 
-- How would you measure the signal efficiency?
+h) How would you measure the signal efficiency?
 
-- Compute the cross-section of this process with the available data.  
+i) Compute the cross-section of this process with the available data.  
 
-- Produce a stacked plot of data signal and background in all the decay channels 
+j) Produce a stacked plot of data signal and background in all the decay channels