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====== Strategies for measurement of lifetimes for long-lived particles ======

People interested : Biplob Bhattacherjee, Shankha Banerjee, Daniele Barducci, Andreas Goudelis, Björn Herrmann, Dipan Sengupta. 

Question : Devising strategies to measure the lifetime of long lived particles ?

 Fix minimal set of benchmark models to calculate lifetimes. 
 Calculate lifetimes for benchmark models. 
 
 Possibilities, ex : leptons, jets, photons .. 
 Classification: based on final states and localization of the decay vertex. 
 Ex , $H \to \phi \phi, \phi \to \mu^{+} \mu^{-} $. 
 
 Dependence of Spin, production Modes ..

 Difficulties : 

 a) Uncertainties in the reconstruction of secondary vertex.
 
 b) Decay inside Ecal/Hcal. 

 c) Missing Energy in the decay. 
  
 d) Estimation of backgrounds.

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