# Presentation: 950484

## FTKSim Status and plans

- FTK Meeting 07/13/2006
- F. Crescioli, M. Dell'Orso, G. Punzi, _G.Volpi_,
- _P. Giannetti_

## FTKSim performance control chain

- Our method to monitor the FTK performances use truth and offline tracks.
- This method eliminate problems due to the ghost.
- Recipes:
- iPatRec customized version
- FTKSimWrapper
- FTKSim

**ATHENA: Generation, Simulation, **
**Digitization**

**iPatRec** (custom)

**FTKSimWrapper**

**Training data format**:
- Hits
- Truth tracks
- Offline tracks

**FTK data format**
- Hits

**FTKSim**

**ftksim_comp**

- FTK tracks

- ROOT Histograms

## Bs->mumu

- Efficiency is greater than 80% in this sample
- Efficiency for pions and kaons is > 75%
- In curvature there are effects due to the different particle types in different curvature ranges.

## Bs->mumu (2)

- No particular problem in FTK, but also in iPatRec, to reconstruct trakcs with large impact parameter.

## WH->munuuu

- We make same standard checks over this sample to validate FTKSim.
- FTK efficiency is lesser than Bs->mumu sample.
- Especially for pion and kaon.
- Plot of efficency as function of curvature is due to the various particle composition at differtents Pt

## WH->munuuu (2)

- Impact parameter spectrum seems well reconstructed
- Not particular effects on efficiency as function of impact parameter of tracks

## WH->munubb

- Same effect on global efficiency and in particular on pions and kaons efficiency.

## WH->munubb (2)

- For the impact parameter we have a large inneficiency for large impact parameters, but also offline seems to have such problem.

## Checks: WH->munuuu WH->munubb

- In a previous meeting was reported results of FTK over these control samples.
- The distrubutions appear quite similar.

## Checks: WH->munuuu WH->munubb (2)

- Using only tracks that have matched with the truth the two distribution appear very differents.

## Partial conclusions

- Bs->mumu and WH samples probably have some differences:
- Pile-up?
- Physics ineraction in ID?
- Misalignments?
- FTK, with an offline match with truth, have good performances.
- Need to implement a method to remove ghosts without using other informations.
- Some tools to validate the FTKSim performances will be uploaded in my FNAL web pages.

## Suggestions for the FTKsim user

- Before starting to use a set of new files with FTKsim, please look at files using the offline tools (an offline track reconstruction algorithm like ipatrec).
- Guido’s tools to compare FTKsim performances with Ipatrec performances. Available @ _[http://fcdfhome.fnal.gov/usr/volpig](http://fcdfhome.fnal.gov/usr/volpig)_
- 	Please use them to check track quality.
- When track quality is guarantee everything else is easier
- 		Possible residual motivation  of problems:
- Ghosts tracks produced by FTKsim require now a particular use of simulated tracks:
- Guido tools are a good example of this use

## Next: Ghost handling  Plan 

- Duplicated roads/tracks due to:
- Deletion of 5/6 by RW when a 6/6 is available produces small inefficiencies if the 5/6 was the real track reject all 5/6 and do 7 fits in parallel (6/6 and all 5/6 combination) to choose the best 2
- Deletion of 5/6 by RW not possible if the empty strips belong to different sectors
- Training tracks going through the overlap region NOW produce many Ghost patterns not identified by the RW because of type 2. Reduce the ghosts of type 2 due to overlap regions, generating a single pattern

## Changes to FTKsim

- Generate again the pattern bank deleting ghosts due to overlap regions (Francesco).
- Modify the Track fitter to perform 7 fits when a 6/6 hit combination is found (Guido).

## MUON Trigger: WHAT WE HAVE UNDERSTOOD  FROM ATLAS TALK

- http://agenda.cern.ch/fullAgenda.php?ida=a062952

- Single  6 GeV  trigger  in the ATLAS trigger plan for Instant Lum = 1033. 2nd   searched using jet ROIs or  ROIs below 6 GeV
- We suggest to look for 2nd  using the list of FTK tracks above 3 GeV, ordered for decreasing Pt.
- Muons are measured by the detector down to 3 GeV.
- Muons are triggered in the barrel with a minimum threshold of 5 GeV

## Muon    Selection

**Muon    Selection**

## LEVEL 1

**LEVEL 1**

**LEVEL 2-**
**Mu-comb **

- 68% efficient for 270 Hz

## TO do list for the  Bs-> 

- Scan the track list to find matches with the external . How many times they are the 2 most energetic tracks above 3 GeV?
- How much the /k background is reduced by this match
- 	FTK-track-MU?
- THIS WORK IS STOPPED TO IMPLEMENT A GOOD GHOST HANDLING