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 Sorted ascending Figure
An event display from 2011 data of a Z+jet candidate. Zmumujet_MC10_data11_eventdisplay.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
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
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
Particle flow inputs to the jet reconstruction energy fraction with respect to the jet transverse momentum. input.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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