Fitting BsJpsiPhi in 5 tiny steps

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Fitting Bs-gtJpsiPhiin 5 tiny steps

• Tristan du Pree
• Nikhef, Amsterdam
• tdupree_at_nikhef.nl

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New Root 5.18

• Released today (December 12)
• Better RooProduct
• Improvements Gerhard, so much faster
• So PVVfit faster in fitting/plotting
• New RooWorkspace
• Easy to share pdfs with

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RooWorkspaceHow to make one in Root

• include RooWorkspace.h
• RooWorkspace myWokSpace
• new RooWorkspace(workSpaceName)
• myWokSpace-gtimport(JPSIPHIpdf)//or other name
  pdf
• TFile f(aap.root,RECREATE)
• myWokSpace-gtWrite(workSpaceName)
• f.Close

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RooWorkspaceHow to open one in Root

• TFile file new TFile(aap.root)
• RooWorkspace myWS
• (RooWorkspace)file-gtGet(workSpaceName)
• RooAbsPdf JPSIPHIpdf myWS-gtpdf(JPSPHIpdf)
• And now do anything you like with the pdf
• Generate
• Plot
• Fit

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How to use the Bs2JpsiPhi-pdf in my attachment in
5 steps

• Open Root 5.18
• root 0 .L AnglesAbsFunc.cc
• root 1 .L TransAngles.cc
• root 2 .L getWorkspace.cc
• root 3 getWorkSpace(aap.root)