Some Questions

Why does the D*0 decay into D0+Pi0 but not into D+Pi- + c.c.?

  • Mass!
  • Mass difference between D*0 and D0 is ~142.12 MeV
  • Mass difference between D0 and D+/- is ~5 MeV
  • This results in an possible Pi+/- phase-space of ~137 MeV, which is kinematically forbidden for real Pi+/-'s (m=139.57 MeV)
  • The Pi0 - only for completion - has a mass of 134.98 MeV

Was ist "mazzanine"?

  • The lowest balkony or forward part of such a balcony in a theatre

-- MaximilianSchlupp - 15-Jun-2011

Hopefully Useful

Merge subjob files, if main job merger fails (e.g. if you do not set the file name correctly)

  • initialise a new Merger
  • Set the correct file-list via
    • myMerger.files = ["correct_file_name"]
  • Optional: Set outputdir (default: main job.outputdir), etc.
  • Merge files with
    • myMerger.merge(job)

Check TCK against Moore version

-- MaximilianSchlupp - 08-Jun-2011

The list of official particle names and their properties is stored in a database. To dump the current list you can run in a new window:

* SetupProject LHCb

* -c sqlite_file:$SQLITEDBPATH/DDDB.db/DDDB -s /param/ParticleTable.txt -d ./ -v

This creates a new file "ParticleTable.txt" in the folder "/parap" relative to your current folder containing all current particle names and properties.

-- MaximilianSchlupp - 27-May-2011

List all replicas of a spezial LFN associated File:

  • SetupProject LHCbDirac
  • lhcb-proxy-init
  • dirac-dms-lfn-replicas /lhcb/user/r/raaij/2010_10/11949/11949015/SelOffline-Bu2JpsiKPreDet-BuJpsiK-MC2010-0x002a002a.dst (file name)

-- MaximilianSchlupp - 30-May-2011

Useful Grid storage quota page

On lxplus one can use lhcb_bkk to check the corresponding CondDB Tags (right click and "more information")

-- MaximilianSchlupp - 24-Jun-2011

From one of Vanyas Emails

One can just check the actual decay in the location:

Eg start dst-explorer, and then

>>> parts =get(‘/Event/…../Particles’)

>>> parts

>>> for p in parts : print p.decay()

In case you expect rare appearance of your decays in file you can use:

>>> a,b = seekforData(‘/Event/…/Particles’ )

>>> parts =get(‘/Event/…../Particles’)

>>> parts

>>> for p in parts : print p.decay()

In this way you see the actual content of your containers and can compare it with your decay descriptor.

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