Existing Plots and Comparisons

• Effect of raising hadron pt threshold from 5 GeV to 10 GeV (full sim)

• Differences between Powheg/Pythia and Powheg/Herwig (both Atlfast)

Questions/Plots ToDo:

• how often do you have a b-quark within a certain dR of a b-meson or -baryon?

• which jets contain a b-meson or -baryon? -> call b-jets

• do not have the MV1 weight for truth jets: match AntiKtTruth jets to AntiKtTopoJets, check how often a b-jet is really tagged

• efficiency plots:

• eff vs pt of b-meson

• eff vs pt of b-ejts

• plot b-Meson pt vs b-jet pt (eta,phi?)

• compare these studies for Alpgen, Powheg, Madgraph

• how good is the matching efficiency depending on the dR(quark, meson)? (reproduce plot from Javier)

• plot number of jets containing a b-meson vs pt, eta, phi

• Determine tagging efficiency
  * Plot the MVA value for the jets with b mesons and those without b mesons
  * Do a cut on MVA and plot how often the jets with b mesons are above the cuts at the nominal working points vs pt,eta phi. You will find that nominal 50% is really quite a spread! Is it the average? median?

          * Repeat the exercise with D mesons and charm baryons vs charm quarks
          * Repeat the exercise with no B or C mesons or baryons and call that uds
          * Once you have a set of reference plots, compare them in Powheg and Madgraph

Interesting Talks:

https://indico.cern.ch/event/274137/contribution/67/material/slides/1.pdf (Summary Talk Tom Lecompte, top-charm frontier)

-- Andrea Knue - 2014-02-11

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