D0ROOT version v9.4

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Change Log

Instructions (TMBTree)

In order to run the script, you first need to create a new release area:

//Create release area
//----------------------------------

kinit

newrel -t p16.05.02 mydir
cd mydir
d0setwa
source Maked0root_p16.csh


Please read the comments in Maked0root_p16.csh script for different options.

Run analysis code

from mydir directory:
root d0root_btag/runBphysicsAnalysis_TMBtree.C

This command will create an instance of the class BphysicsAnalysis called "b". To see the list of available methods please look at d0root_btag/analysis/BphysicsAnalysis.h

To create a B-rtuple with information about J/Psi, X state, and B->J/Psi K+ vertices, do:

    b->Process_diMuons("myOutputFileName", muon_pt, PVbeamConstraint);

• "myOutputFileName" is the name of the output root tree.
• muon_pt is the minimum global muon pT in GeV/c, by default 1.5 GeV/c.
• PVbeamConstraint is set to 0 (false) by default.
• All Loose muons are considered

In order to open the ROOT-tuple and plot the J/Psi invariant mass and lifetime, do:

 root myOutputFileName.root
 tree->Draw("PSI.mass","PSI.mass>2 && PSI.mass<4")
 tree->Draw("PSI.lifetime","PSI.mass>2.8 && PSI.mass<3.3")

Please send questions/comments/improvements/ or report problems to the

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