Old To do list

After D2H Meetings (15/11/2013 and 26/11/2013)

• Topological variables distributions (like dca, ptleg, etc).
  • It was suggested to use real data for background distribution.
• SPD kAny x kFirst
  • Include comparison of yields using a fix value for mean and sigma, in order to reduce influence of fit in the comparison.
• PID nSigma:
  • Try to understand behaviour with TOF only + topological cuts.
  • Check pt distribution (and ) of prongs after TOF only selection.
  • Check the results using other topological cuts, except pt leg cut.
  • Another suggestion --> Use TOF up to something like 1.5 to 1.8 GeV/c and TPC for the rest.
• Check LHC13b -- pass2 x pass3
• Start analysing efficiencies (maybe first try in the train of 29/11/2013)

After Discussion with Rossella (Monday, 11/11/2013)

• Check last train results (results are ready by now, there was some delay due to some problem with one GRID site)
  • Train 106 (November 5th) failed for some troubles with one site
  • Train 107 (November 8th) same train as 106. Outputs ready. (to be checked soon)

• Nsigma PID cuts -- To be checked with the lego train results
  • Simple Nsigma cut --> To be checked in the results of train 107. At first glance, Bkg is enormous
  • Two new methods --> They will be tested in the next train

• Simulation. Outputs ready. Ongoing analysis
  • The different variables distribution: For signal and for bkg.
  • Pt cuts variation (specially for the proton)

• Determine best cuts soon --> So that efficiencies and systematics can be extracted as soon as possible.
  • Ask Chiara for a change in how the systematics are estimated
    • Variation of signal extraction according to the bin variation.

• Make an appointment with Andrea, in order to discuss about future analyses for the ITS upgrade.

After Meeting November 5th:

• pt cuts to be smoothly changed
  • Based on previous results (pp collisions), cut on proton pt should be greater than the cut for pions and Kaons.
• Check pt leg distributions using Simulation (maybe only on Decayer level). Done D2H 15/11/2013

October 2013:

After meeting October 31th

• pt cuts to be smoothly changed, especially for kaons, in contrast with abrupt changes used for the results presented in the meeting.
  • In principle, if it is not possible to loose some of the cuts (or make them more consistent with the Lc pt), I will try to understand and prove why they should be as they are. done(presented in November 5th)
• DCA, CosPointingAngle --> Same as above done(presented in November 5th)
• Retuning of cuts when the SPD kFirst cut is applied to the tracks Postponed
  • We need some care here, because one needs to verify whether SetNClusterITS should be also changed.
• Compare mean and sigma attained with the invariant mass fit with the results from Simulation (also for ITS kFirst).
• Use PID nSigma cut for comparison purposes Postponed
  • Besides, use new strategies implemented by Francesco, that is, circular cut (TPC and TOF) and also "AND" cut TPC and TOF.
• Show the distributions of the cutting variables with different PID strategies. Postponed
• Use Lego Train. (first 3 wagon created) --- for some reason the task crashed with trunk (that's why it is not in Friday's Lego) Solved (first train in November 5th)

Sep-October 2013

• CFContainer development in order to tune the cuts (done) --> https://twiki.cern.ch/twiki/bin/view/Main/Lambda-cAndCF
• Signal Extraction --> https://twiki.cern.ch/twiki/bin/view/Main/Lambda-cInP-PbSignal
  • SPD kAny and SPD kFirst --> In principle, SPD has less dead zoned in 2013. This could motivate a more strict selection. (first studies done)
  • PIDCombined --> New selection for pPb (AliRDHFCutsLctopKpi::kCombinedpPb), already implemented by Rossela.
    • SPD kAny (first studies done)
    • SPD kFirst (first studies done)
  • PIDCombined2 --> New selection based on Audrey studies (AliRDHFCutsLctopKpi::kCombinedpPb2), already implemented by Rossela. (submitted to the GRID with SPD kany) (outputs ready)