TOP-11-021
Measurement of the single top t-channel cross section in pp collisions at √s = 7 TeV using 2011 data

Abstract

The cross section of t-channel single-top production is measured in pp collision at √s = 7 TeV with the CMS detector at the LHC. Leptonic decay channels with a muon or an electron in the final state are considered. After a selection optimized for the t-channel, the pseudodorapidity distribution of the recoil jet and the reconstructed top quark mass are exploited for the measurement. The background in the selected sample is largely estimated with data. With an integrated luminosity of 1.14 fb−1 (1.51 fb−1) for the muon (electron) channel the combined (muon and electron) cross section is 70.2 5.2 (stat) 10.4 (syst) 3.4 (lumi) pb.

Public Document

The document CMS-PAS-TOP-10-021 is published on the CERN document server here.

Figures

Figure Caption
ResultEtaMu.png Result of simultaneous fit to |ηj′| in the muon decay channel. [pdf]
ResultEtaEle.png Result of simultaneous fit to |ηj′| in the electron decay channel. [pdf]
chargeGoodMuStack.png Charge of the muon in muon decay channel normalized to the fit result. [pdf]
chargeGoodEleStack.png Charge of the electron in electron decay channel normalized to the fit result. [pdf]
topMassGoodMuStack.png Distribution of mlνb in the |ηj′| > 2.8 region for muons, obtained normalizing each process yield to the value from the fit. Due to limited statistic in the simulation, background distribution is smoothed through a simple spline. [pdf]
topMassGoodEleStack.png Distribution of mlνb in the |ηj′| > 2.8 region for muons, obtained normalizing each process yield to the value from the fit. Due to limited statistic in the simulation, background distribution is smoothed through a simple spline.[pdf]
costhetaljCombStack.png Distribution of cosθ in the |ηj′| > 2.8 region summed for both muons and electrons, t-channel single top quark production obtained normalizing each process yield to the value from the fit. cosθ is defined as the angle between the lepton and the non b-tagged jet in the reconstructed top quark rest frame. Due to limited statistic in the simulation, background distribution is smoothed through a simple spline. [pdf]
costhetaljCombStack.png Single top cross section in the t channel versus centre-of-mass energy, comparing our measurement with the dedicated t-channel cross section measurements at Tevatron and with the QCD expectations computed with at NLO with MCFM in the 5-flavour scheme and at NLO+NNLL. The error band (width of the curve) is obtained by varying the top mass within its current uncertainty, estimating the PDF uncertainty according to the HEPDATA recommendations, and varying the factorization and renormalization scales coherently by a factor two up and down. [pdf]

-- LucaLista - 02-Mar-2012

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf ResultEtaEle.pdf r3 r2 r1 manage 17.6 K 2012-03-06 - 00:10 AlbertoOrsoMariaIorio  
PNGpng ResultEtaEle.png r3 r2 r1 manage 13.5 K 2012-03-06 - 00:11 AlbertoOrsoMariaIorio  
PDFpdf ResultEtaMu.pdf r2 r1 manage 19.8 K 2012-03-06 - 00:12 AlbertoOrsoMariaIorio  
PNGpng ResultEtaMu.png r3 r2 r1 manage 13.8 K 2012-03-06 - 00:12 AlbertoOrsoMariaIorio  
PDFpdf chargeGoodEleStack.pdf r3 r2 r1 manage 17.0 K 2012-03-06 - 00:13 AlbertoOrsoMariaIorio  
PNGpng chargeGoodEleStack.png r3 r2 r1 manage 13.9 K 2012-03-06 - 00:13 AlbertoOrsoMariaIorio  
PDFpdf chargeGoodMuStack.pdf r3 r2 r1 manage 17.2 K 2012-03-06 - 00:15 AlbertoOrsoMariaIorio  
PNGpng chargeGoodMuStack.png r3 r2 r1 manage 14.0 K 2012-03-06 - 00:15 AlbertoOrsoMariaIorio  
PDFpdf costhetaljCombStack.pdf r3 r2 r1 manage 20.4 K 2012-03-06 - 00:16 AlbertoOrsoMariaIorio  
PNGpng costhetaljCombStack.png r3 r2 r1 manage 17.0 K 2012-03-06 - 00:16 AlbertoOrsoMariaIorio  
PDFpdf finalplot_moriond2012_noATLAS.pdf r1 manage 14.9 K 2012-03-02 - 15:31 LucaLista  
PNGpng finalplot_moriond2012_noATLAS.png r1 manage 101.9 K 2012-03-02 - 15:30 LucaLista  
PDFpdf topMassGoodEleStack.pdf r3 r2 r1 manage 23.4 K 2012-03-06 - 00:20 AlbertoOrsoMariaIorio  
PNGpng topMassGoodEleStack.png r3 r2 r1 manage 16.5 K 2012-03-06 - 00:21 AlbertoOrsoMariaIorio  
PDFpdf topMassGoodMuStack.pdf r3 r2 r1 manage 24.2 K 2012-03-06 - 00:21 AlbertoOrsoMariaIorio  
PNGpng topMassGoodMuStack.png r3 r2 r1 manage 16.3 K 2012-03-06 - 00:21 AlbertoOrsoMariaIorio  
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Topic revision: r7 - 2012-03-12 - LucaLista
 
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