Run 2 H->bb twiki

Twiki to document the Run 2 H->bb analysis. Will also cover useful code stuff.

xAODs

The new data format for run 2 is xAOD. It is a root readable AOD.

setupATLAS
asetup here,19.1.X.Y-VAL,rel_3,AtlasDerivation
checkSG.py xAOD.pool.root 

Shower Deconstruction

Shower deconstruction is a jet substructure method that uses fat jets reclustered into small R jets to discriminate between signal and background. It takes these reclustered jets and calculates a how similar to a signal model they are. It runs every possible permutation when assigning each subjet to, in our case, two b jets, underlying event ISR and FSR(have I missed one?) and sums every permutation. It then does the same for background. The ration of these two values is called Χ and is the variable used to cut/train on. REFERENCES!!!!

CERN Run 2 Analysis Framework

-- Paul Mullen - 2014-10-02

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