Muon reconstruction in release 15.6.1.2

D. Adams
December 2009

Release 15.6.1.2

For other releases, see the complete list of results.

Issues were last reported in 15.6.0.3.

1. Hole counts have not been validated and are known to have problems.

  • Bug report: 58728

    2. Muonboy find almost no tracks for |eta|<1.0 in 15.6.0.3.
  • This is the problem fixed in 15.3.1.1: 54042. A patch was introduced in 15.3.1 but apparently lost going to 15.6.0.
  • This should be properly fixed in 15.6.1.

    3. Since 15.1.0.5, Moore has been allowing very low quality tracks near |eta| of 1.2 and then using inner detector information to filter which of these is written to the AOD. This boosts the standalone and combined efficiencies in this region but implies care must be taken if the standalone tracks are to be used to asses inner detector efficiency.

    4. MuGirl now provides extended fits for most muons but the MDT hit multiplicity for these fits is below that for Staco or Muid muons.
  • Bug report: 50675
  • A fix for the MDT went into 15.4.0. 5. MuGirl now has CSC hits but the mutliplicity is lower than Moore and Muonboy, especially for positive eta.
  • Bug report: 59567.

    6. Spectrometer and extrapolated tracks are missing in AOD muons which have the corresponding track particles. This means the list of hits must be taken from the combined track when it is present and are not available when it is not.
  • Bug report: 57890.

    7. Muonboy loses efficiency in the CSC region when that detector is off.
  • Bug report: 60631.

    8. There is a problem with the CSC cluster positions for eta>0 in this and 15.6.0.3.
  • Bug report: 59938.

    Graphical summaries

    Plots created for physics validation (08dec09)
        Minbias check
    Plots created for 15dec09 physics validation meeting
        T1 comparsion
        Minbias with different field configurations

    dladams@bnl.gov