LHCb jet performance at √s=7 TeV

The draft note is available here:


Jet studies at LHCb are presented in this note to support jet measurements performed in this experiment. We discuss inputs used in jet reconstruction, cuts to identify jets and a energy correction approach.


(Note, pdf versions are available under attachments).

Caption Figure
Particle flow inputs to the jet reconstruction energy fraction with respect to the jet transverse momentum. input.gif
Efficiency of jet reconstruction and identification derived in MC. Jets were selected in Z+jet events, where the jet is back-to-back with the Z. Two cuts on the jet transverse momentum are shown. jeteff_n90cut_etabin_15_50.gif
Efficiency of jet reconstruction and identification derived in MC. Jets were selected in Z+jet events, where the jet is back-to-back with the Z. Two regions of jet pseudo-rapidity are shown. jeteff_pt_n90cut.gif
Difference in PHI between the Z and the jet. The Z is identified in muon decays and jet is reconstructed with the particle flow algorithm. Data 2011 is showed to support the good selection of a jet well balanced with a Z. Zmumujet_MC10_data11_deltaphi.gif
Jet transverse momentum divided by Z transverse momentum. The Z is identified in muon decays. Data 2011 and MC10 are compared. Good agreement between data and simulation is observed. Zmumujet_MC10_data11_pTbalance.gif
An event display from 2011 data of a Z+jet candidate. Zmumujet_MC10_data11_eventdisplay.gif

-- TaraShears - 18-Sep-2012

Topic attachments
I Attachment History Action Size Date Who Comment
GIFgif Zmumujet_MC10_data11_deltaphi.gif r1 manage 11.5 K 2012-09-18 - 16:32 TaraShears  
PDFpdf Zmumujet_MC10_data11_deltaphi.pdf r1 manage 26.0 K 2012-09-18 - 16:32 TaraShears  
GIFgif Zmumujet_MC10_data11_eventdisplay.gif r1 manage 33.7 K 2012-09-18 - 16:32 TaraShears  
PDFpdf Zmumujet_MC10_data11_eventdisplay.pdf r1 manage 68.0 K 2012-09-18 - 16:32 TaraShears  
GIFgif Zmumujet_MC10_data11_pTbalance.gif r1 manage 17.8 K 2012-09-18 - 16:32 TaraShears  
PDFpdf Zmumujet_MC10_data11_pTbalance.pdf r1 manage 25.7 K 2012-09-18 - 16:32 TaraShears  
GIFgif input.gif r1 manage 14.2 K 2012-09-18 - 16:32 TaraShears  
PDFpdf input.pdf r1 manage 24.1 K 2012-09-18 - 16:32 TaraShears  
PDFpdf jeteff_eta_pt10_n90cut.pdf r1 manage 13.2 K 2012-09-18 - 16:32 TaraShears  
GIFgif jeteff_n90cut_etabin_15_50.gif r1 manage 10.6 K 2012-09-18 - 16:32 TaraShears  
GIFgif jeteff_pt_n90cut.gif r1 manage 10.4 K 2012-09-18 - 16:32 TaraShears  
PDFpdf jeteff_pt_n90cut.pdf r1 manage 10.2 K 2012-09-18 - 16:32 TaraShears  
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Topic revision: r1 - 2012-09-18 - TaraShears
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