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The major issues: m detection efficiency m p resolution p punchthrough

Performance Studies of the SD Muon Detector for the Linear Collider C. Milstene -Arlington Workshop January 9-11,2003. The major issues: m detection efficiency m p resolution p punchthrough are analyzed from within Jas The data samples : sio files from SLAC

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The major issues: m detection efficiency m p resolution p punchthrough

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  1. Performance Studies of the SD Muon Detector for the Linear ColliderC. Milstene -Arlington Workshop January 9-11,2003 • The major issues: • m detection efficiency • mp resolution • p punchthrough • are analyzed from within Jas • The data samples : sio files from SLAC • The analysis: is based on R. Markeloff software • A direct comparison in the main parameters with Piccolo for Tesla.

  2. Plan 1) SD versus Tesla Detectors. 2) The choice of the energy points. 3) A set of typical and Non-typical p events and theirm counterpart. 4) Choice of the parameters for m Detection: The m detection efficiency stability upon changes of algorithms 5) The m p resolution 6) The punchthrough p’ s

  3. The Choice of the Energy points From: Calorimetry LC : Overview Ray Frey, U. of Oregon Chicago LCW, Jan 7, 2002 The majority of the particles are produced at energies below 30 GeV arrow. m at and above 4 GeV reach MuDet. Very few p of 5 GeV do Part are curling back in the magnetic field

  4. 4 GeV Muon – run 1 event 2- 32 hits in the Muon Barrel

  5. 4 GeV Muon- event 31 run 1- Fish Eye View- 32 hits in Muon Barrel

  6. A 5 GeVp -> m nDecay – Event 206 Run 1- 33Hits MuDet

  7. Typical 10 GeV m -Event 9 Run 1-33 Hits in MuDet

  8. A Typical 10 GeV m- Event 3 Run 1- with 33 Hits in MuDet

  9. A Typical 4 GeV Pi- event 15 Run1 – y-FishEye View no hits in Muon Detecto

  10. Typical 5 GeV pi-Event 142 Run 1- >100hits in HDCal- no Hits MuDet

  11. Typical 5 GeV pi- Event 21 Run 1-Curling back effect of B=5T

  12. Typical 10 GeV punchthrough p-event 118-Run1- 6 hits MuDet

  13. Punch Through 50 GeV pi- event 11 run 0- y-EyeFish View-18 hits in Muon Detector

  14. The SD and TESLA Muon Detectors Comparison of the relevant parameters: SDTESLA Outer_thick_plate (Tesla only) 645cm Outer_Radius 660.5cm 585cm Inner_Radius 348.5cm 445cm --------- -------- 312 cm 140cm The Unit: Fe 5cm Fe 10cm Gap 1.5cm RPC/gap Gap 4cm 48 Layers 10 Layers 80cm Fe=16 planes 80cm Fe=10planes #Inter. Length SD(EM+HAD)= 3.9 Lambda(Si+W) Tesla 5.4 Lambda Prior to MuDet

  15. F,q,nlayer The Algorithm MU Coil 248cm mcandidate maxFbins(Tk-HDCal)=4 max qbins(Tk-HDCal) =2 m Track HDNLayers HDNHits HDHits MUNLayers MUNHits MUHits Minimum HDNHits = 0 MUNHits =12 F,q,nlayer maxFbins(Tk-HDCal)=3 max qbins(Tk-HDCal) =1 HD 143cm m list EM 127cm Track Extrapolated Muon Package of R. Markeloff SD Detector

  16. Single Muon Efficiency = F(Particle Momentum) The Algorithm chosen are based upon the m properties of penetration in correlation with the lack of interactions and the track continuity. The decays have been subtracted following the procedure used in The source code of MCPseudoParticle by M.Ronan/T. Johnson. The m Identification algorithm • A charged track reconstructed • Matching in HD within 3F bins 1qbins • Matching in MuCal within DF ~40mrdq~20mrd • More than 12 hits in Mucal

  17. m efficency stability against algorithm variations Cut1- DF ~40mrd Dq~40mrd- cut at 16 planes(80cm of steel). Cut2- DF ~40mrd Dq~20mrd- cut at 12 planes. Cut3-DF ~30mrd Dq~10mrd- cut at 12 planes. Cut4-DF ~30mrd Dq~10mrd- cut at 8 planes.

  18. Comparison with themefficiency at Tesla • m Efficiency for SD is represented • on top of the plot of M.Piccolo for Tesla • The algorithm used by M. Piccolo: • A m stub crossing at least 8/11 planes (80cm of steel) • A stub is defined by angular hits consistency in MuCal: The matching is within • DF ~40mrdDq~40mrd

  19. Pion Response of the Muon System • The response to p • reported for 35000 events (Tesla) • By M . Piccolo has been Reproduced Theblue diamonds represent The SD • Points for p after • Normalization to account for the • Difference in interaction length • and statistics • TheGreen stars • Correspond to an • Extra cut: • Requiring 5 planes with >=2 hits

  20. Punch Through per Layer The number of hits Per layer is shown For 3 points of Energy without applying the Extra-cut of 2 hits or more in 5 layers.

  21. Extra cuts were used to take into account the multiplicity of hits in each Layer of the Muon Detector. A cut on tracks having 5 layers with 2 or more hits within Df =40 , Dq=40 mrd is shown in the plot representing the p response of the m system. It improves the separation p m by a factor two at 50GeV and 20 GeV. Adding a condition involving higher multiplicity per layer, improves the separation by a factor 5 more. The separation at lower energies improved very little. Those cuts did barely affect the m efficiency within the error Bar , the m range being of 1-2 hits per layer within the Df,Dq range. A set of cuts of the kind could be defined depending on the physics Channel Of interest.

  22. Conclusion The m efficiency is stable through a large variety of algorithms and comparable in both detectors. The p response of the m system is quite comparable as well. The p m separation improves with cuts on the layer hits Multiplicity. To the first order both SD and Tesla have similar performances. And improvements are anticipated by using other calorimeter information.

  23. From 6 GeV and up, the m of the decay will be detected by MuDet being produced in the direction of the original p and with a p> 4GeV over almost the whole range. (from G. Fisk)

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