Method for the determination of hadronic tracking efficiencies using partially reconstructed charm decays.
People involved:
Mika Vesterinen,
Laurent Dufour,
Jeroen van Tilburg, S. Hellesund, D. Mueller.
Note
The latest version of the note can be found at
https://svnweb.cern.ch/cern/wsvn/lhcbdocs/Users/ldufour/Velo2Long/latest/latex/main.pdf
Code
All code is available on
GitLab in the "AsymmetryTools" subproject of semileptonics.
In there there is the "Velo2Long" in "projects".
https://gitlab.cern.ch/lhcb-slb/AsymmetryTools
In order to compile:
(checkout the project)
source setenv.sh
cmake .
make
make install
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
Data samples
* Location: /eos/lhcb/user/l/ldufour/Velo2Long contains (2012, 2015) 4-body and (2015, 2016) 2-body samples.
Monte Carlo samples
Large MC samples to be generated a.s.a.p.
BKK paths:
Signal
- 27163003: 2012 conditions, Pythia 6 & 8, 2-body mode, DecProdCut
- sim08a: evt+std://MC/2012/27163003/Beam4000GeV-2012-MagDown-Nu2.5-Pythia8/Sim08a/Digi13/Trig0x409f0045/Reco14a/Stripping20NoPrescalingFlagged/ALLSTREAMS.DST 3.5M events
- sim08e: evt+std://MC/2012/27163003/Beam4000GeV-2012-MagDown-Nu2.5-Pythia8/Sim08e/Digi13/Trig0x409f0045/Reco14a/Stripping20NoPrescalingFlagged/ALLSTREAMS.DST 140k events
- sim08h: evt+std://MC/2012/27163003/Beam4000GeV-2012-MagDown-Nu2.5-Pythia8/Sim08h/Digi13/Trig0x409f0045/Reco14c/Stripping20NoPrescalingFlagged/ALLSTREAMS.DST 1M events
- sim09a: evt+std://MC/2012/27163003/Beam4000GeV-2012-MagDown-Nu2.5-Pythia8/Sim09a/Digi13/Trig0x409f0045/Reco14c/Stripping20NoPrescalingFlagged 1M events
- 27163008: 2012 conditions, Pythia 6 & 8, 2-body mode, TightCut
- sim08a: evt+std://MC/2012/27163008/Beam4000GeV-2012-MagDown-Nu2.5-Pythia8/Sim08a/Digi13/Trig0x409f0045/Reco14/Stripping20NoPrescalingFlagged/ALLSTREAMS.DST 2M events
- (the other one is stripping filtered)
- 27265000: 2012 conditions, Pythia 6 & 8, 4-body mode, DecProdCut (low statistics?)
- sim08a: evt+std://MC/2012/27265000/Beam4000GeV-2012-MagDown-Nu2.5-Pythia8/Sim08a/Digi13/Trig0x409f0045/Reco14a/Stripping20NoPrescalingFlagged/ALLSTREAMS.DST 1.3M events
Background
- 27163400: 2012 conditions, Pythia 8, DecProdCut, mode: K pi pi0
- sim08f: evt+std://MC/2012/27163400/Beam4000GeV-2012-MagDown-Nu2.5-Pythia8/Sim08f/Digi13/Trig0x409f0045/Reco14a/Stripping20NoPrescalingFlagged/ALLSTREAMS.DST 5M events
- 27173001: 2012 conditions, Pythia 8, DecProdCut, mode: K mu nu (semileptonic D decay)
- sim08d: evt+std://MC/2012/27173001/Beam4000GeV-2012-MagDown-Nu2.5-Pythia8/Sim08d/Digi13/Trig0x409f0045/Reco14a/Stripping20NoPrescalingFlagged/ALLSTREAMS.DST 2.5M events
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 |
- |
Comparison to Monte Carlo |
5 |
No |
- |
Projected results and conclusion |
5 |
No |
- |
Todo list
- Generate MC samples for background and signal.
- 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