TWiki> LHCb Web>LHCbTrackingEfficiencies>Velo2Long (revision 4)EditAttachPDF
Method for the determination of hadronic tracking efficiencies using partially reconstructed charm decays.

People involved: Mika Vesterinen, Laurent Dufour, J. Van Tilburg, S. Hellesund, D. Mueller.


Code is available on GitLab in the "AsymmetryTools" subproject of semileptonics.

Earlier documentation

"Measuring pion and kaon tracking efficiencies and asymmetries using charm decays with one partially reconstructed track" (S. Hellesund) LHCb-INT-2014-041

"Measurement of the Kaon Detection Asymmetry using Double-tagged Partially Reconstructed D0 Decays" (D. Mueller) LHCb-INT-2013-054

Overall structured flow paper

Task Order Completed Link to .pdf
Selection 1 Ongoing -
Fit model 2 No -
Resolution and bias studies 2 No -
Raw asymmetry and efficiency dependencies 3 No -
VELO efficiency determination 4 No -
Comparison with other methods 4 No -
Projected results and conclusion 5 No -

Todo list

  • Create OVERLAP functor taking ChildSelector arguments.
  • Verify that the MatchLong efficiencies are the same as the StdAllNoPIDPions container
  • Verify the L0 GLOBAL TIS condition for the 2016 data set.
  • Run anti-isolation for the 2-body mode.
  • Run a toy study: is there a bias in the actual momentum from the DTF?
  • Plot the momentum resolution from DTF.
  • Actually get the VELO efficiencies in.
  • Create pointing mass functor (desirably taking ChildSelector arguments).
  • Find out the anomalous asymmetry for very low momentum pions.
  • Fit in bins of nTracks in one fixed bin of momentum

Earlier presentations

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Topic revision: r4 - 2016-07-14 - LaurentDufour
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