(r4) Velo2Long < LHCb

LHCb Web>LHCbTrackingEfficiencies>Velo2Long (revision 4) (raw view)~~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
Code is available on GitLab in the "AsymmetryTools" subproject of semileptonics. 
https://gitlab.cern.ch/lhcb-slb/AsymmetryTools

---++ Earlier documentation
[[https://cds.cern.ch/record/1954312/files/LHCb-INT-2014-041.pdf]["Measuring pion and kaon tracking efficiencies and asymmetries using charm decays with one partially reconstructed track"]] (S. Hellesund) LHCb-INT-2014-041

[[https://cds.cern.ch/record/1620824/files/LHCb-INT-2013-054.pdf]["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
   * [[https://indico.cern.ch/event/442261/]["New D&#8727;-based tracking efficiency method using the turbo stream", S&A week 12-07-2016. ]]
   * [[https://indico.cern.ch/event/485536/]["Detection asymmetries on turbo with persist reco", T&A meeting, 26-05-2016. ]]
   * [[https://indico.cern.ch/event/523450/]["Detection efficiencies on turbo with persist reco", HLT operations meeting, 13-05-2016. ]]

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

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