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


Topic revision: r3 - 2014-02-21 - GavinKirby
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