Muon reconstruction in release 15.6.0.3

D. Adams
September 2009

Release 15.6.0.3

For other releases, see the complete list of results.

Issues were last reported in 15.3.0.2.
Issues are next reported in 15.6.1.2.

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.

    Graphical summaries

    Plots prepared for September 24, 2009 physics validation meeting agenda
        15.6.0.3 T1 comparison

    Plots or September 27, 2009 physics validation meeting agenda
        15.6.0.3 T1 comparison including sim
        15.6.0.3 Minbias comparison including sim

    dladams@bnl.gov