Combination of CMS results on the mass of the top quark using up to 5.0 /fb


We present a combination of CMS top mass measurements in the lepton+jets, dilepton and all-jets channels, using data recorded in 2010 and 2011 by the CMS experiment corresponding to an integrated luminosity of up to 5.0 /fb. We present two combinations. The first uses three published results and gives a resulting top mass of 173.32 +/- 0.27 (stat.) +/- 1.02 (syst.) GeV. The second also includes the latest preliminary CMS measurements and yields an improved top-quark mass measurement of 173.36 +/- 0.38 (stat.) +/- 0.91 (syst.) GeV.

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The document is available as a CMS Physics Analysis Summary : cds entry



Figure Caption
CMSCombination.png Fig1. Input measurements from CMS and resulting combination. [Get pdf version]
CMSCombinationTevatron.png Fig2. Input measurements from CMS and resulting combination compared to the latest Tevatron combination. [Get pdf version]
CMSCombinationTevatronBest.png Fig3. Input measurements from CMS and resulting combination compared to the latest Tevatron combination and the best individual measurements from CDF and D0. [Get pdf version]


Table Caption
Uncertainty_mapping.png Tab1: Summary of the mapping of the uncertainties for the input measurements used. This table shows the correlation coefficients used for the combination as well as the weights each input analysis gets in the combination. Symbols n/a and n/e stand for not-applicable and not-evaluated respectively.
Correlation_matrix.png Tab2: Correlation matrix following BLUE combination. Low correlation regarding 2011 lepton+jets reflects the different fit used in this analysis (2D fit versus 1D fit for other analysis)

-- GuillaumeGarcia - 05-Mar-2012

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf CMSCombination.pdf r1 manage 14.2 K 2012-09-13 - 14:09 GuillaumeGarcia  
PNGpng CMSCombination.png r2 r1 manage 28.7 K 2012-09-13 - 14:07 GuillaumeGarcia  
PDFpdf CMSCombinationTevatron.pdf r1 manage 14.5 K 2012-09-13 - 14:09 GuillaumeGarcia  
PNGpng CMSCombinationTevatron.png r1 manage 32.5 K 2012-09-13 - 14:06 GuillaumeGarcia  
PDFpdf CMSCombinationTevatronBest.pdf r1 manage 14.9 K 2012-09-13 - 14:08 GuillaumeGarcia  
PNGpng CMSCombinationTevatronBest.png r1 manage 42.5 K 2012-09-13 - 14:06 GuillaumeGarcia  
PNGpng Correlation_matrix.png r1 manage 19.5 K 2012-09-13 - 14:30 GuillaumeGarcia  
PNGpng Uncertainty_mapping.png r1 manage 181.6 K 2012-09-13 - 14:24 GuillaumeGarcia  
PNGpng result.png r1 manage 5.0 K 2012-09-13 - 14:37 GuillaumeGarcia  
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Topic revision: r6 - 2012-09-13 - RobertoTenchini
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