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Invariant Mass and Width: Data-MC

Updated on Thu, 2008-07-31 10:13. Originally created by fsimon on 2008-07-31 10:00.

Here I show the invariant masses and corresponding widths I obtain using my cross section binning. These are compared to MC values.

The Method:

  • Invariant mass Data histograms (low mass background and combinatoric background subtracted) are fitted with a gaussian in the range 0.1 - 0.18 GeV/c^2. This gives the mass (gaussian mean) and width (gaussian sigma)
  • MC invariant mass histograms are obtained from correctly associated MC Pi0s after reconstruction. No weighting of the different partonic pt samples is performed. This can (and will) introduce a bias
    • Then the same fitting procedure as for data is applied

The results are shown in the two figures below.

Mass:

 

Width:

 

 

 

Groups: