Measurement of the top quark mass using the B-hadron lifetime technique

Abstract

A measurement of the top quark mass using the transverse decay length (Lxy) of B-hadrons reconstructed in tt candidate events with exactly one charged lepton or one electron and one muon in the final state is presented. The analysis makes use of the proton-proton collision data recorded by the CMS experiment at a center of mass energy of s1/2 = 8 TeV during the year 2012. Using the median of the Lxy distribution reconstructed in data we measure: mt = 173.5 ± 1.5stat ± 1.3syst ± 2.6pt(t) GeV, in good agreement with previous measurements of the top quark mass.

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Figures

Secondary vertex characteristics in data and as predicted from simulation and control regions in the different channels analysed. The expected contributions from each individual channel are stacked and the total is compared to the observed data. The bottom panels display the ratio of the observed data to the prediction.

Tables

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf Table1.pdf r1 manage 46.6 K 2013-07-05 - 00:01 PedroSilva  
PNGpng Table1.png r1 manage 54.2 K 2013-07-05 - 00:01 PedroSilva  
PDFpdf Table2.pdf r1 manage 104.6 K 2013-07-05 - 00:01 PedroSilva  
PNGpng Table2.png r1 manage 126.4 K 2013-07-05 - 00:01 PedroSilva  
PDFpdf Table3.pdf r1 manage 30.0 K 2013-07-05 - 00:01 PedroSilva  
PNGpng Table3.png r1 manage 34.3 K 2013-07-05 - 00:01 PedroSilva  
PDFpdf Table4.pdf r2 r1 manage 24.4 K 2013-07-08 - 18:33 JuergEugster  
PNGpng Table4.png r2 r1 manage 37.8 K 2013-07-08 - 18:33 JuergEugster  
PDFpdf combinedCalibration_q50.pdf r1 manage 16.2 K 2013-07-04 - 23:47 PedroSilva  
PNGpng combinedCalibration_q50.png r1 manage 131.7 K 2013-07-04 - 23:43 PedroSilva  
PDFpdf displacedVtx.pdf r2 r1 manage 32.9 K 2013-07-12 - 00:19 PedroSilva  
PNGpng displacedVtx.png r2 r1 manage 35.4 K 2013-07-12 - 00:19 PedroSilva  
PDFpdf e_jetmass.pdf r2 r1 manage 22.1 K 2013-07-07 - 07:33 JuergEugster  
PNGpng e_jetmass.png r3 r2 r1 manage 45.1 K 2013-07-07 - 07:42 JuergEugster  
PDFpdf e_maxlxy.pdf r2 r1 manage 27.6 K 2013-07-07 - 07:33 JuergEugster  
PNGpng e_maxlxy.png r3 r2 r1 manage 44.6 K 2013-07-07 - 07:42 JuergEugster  
PDFpdf emu_jetlxy_final.pdf r2 r1 manage 26.6 K 2013-07-07 - 07:33 JuergEugster  
PNGpng emu_jetlxy_final.png r3 r2 r1 manage 45.2 K 2013-07-07 - 07:42 JuergEugster  
PDFpdf emu_jetmass_final.pdf r2 r1 manage 23.6 K 2013-07-07 - 07:33 JuergEugster  
PNGpng emu_jetmass_final.png r3 r2 r1 manage 43.4 K 2013-07-07 - 07:42 JuergEugster  
PDFpdf mu_jetmass.pdf r2 r1 manage 22.8 K 2013-07-07 - 07:33 JuergEugster  
PNGpng mu_jetmass.png r3 r2 r1 manage 46.0 K 2013-07-07 - 07:42 JuergEugster  
PDFpdf mu_maxlxy.pdf r2 r1 manage 27.6 K 2013-07-07 - 07:33 JuergEugster  
PNGpng mu_maxlxy.png r3 r2 r1 manage 44.6 K 2013-07-07 - 07:42 JuergEugster  
PDFpdf svtx_TnP_qcd_medianlxy.pdf r1 manage 14.7 K 2013-07-04 - 23:54 PedroSilva  
PNGpng svtx_TnP_qcd_medianlxy.png r1 manage 108.3 K 2013-07-04 - 23:54 PedroSilva  
PDFpdf svxtMass_inc_fit.pdf r1 manage 17.9 K 2013-07-04 - 23:54 PedroSilva  
PNGpng svxtMass_inc_fit.png r1 manage 121.3 K 2013-07-04 - 23:54 PedroSilva  
PDFpdf xbTunes.pdf r1 manage 14.5 K 2013-07-04 - 23:54 PedroSilva  
PNGpng xbTunes.png r1 manage 88.5 K 2013-07-04 - 23:54 PedroSilva  
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Topic revision: r9 - 2013-07-18 - RobertoTenchini
 
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