Difference: FlavourTaggingPublicResultsCollisionDataRetired ( vs. 1)

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FlavourTaggingPublicResultsCollisionDataRetired

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Introduction

On this page you can find a section that collects the links to the Flavour Tagging ATLAS papers and CONF Notes, as well as collections of approved plots. Each CONF Note link points to a page where you can find:
  • the PDF file of the note or paper;
  • the eps and the png file for each plot that appears in the document.

For more information please contact: Richard Hawkings, Andrea Coccaro

Journal papers

HL-LHC Upgrade Studies

List of Approved Plots and Notes for HL-LHC Simulation Studies

13 TeV Data

List of CONF Notes for 13 TeV Data

List of PUB Notes for 13 TeV Data

Approved plots for 13 TeV Data

8 TeV Data

List of CONF Notes for 8 TeV Data

List of PUB Notes for 8 TeV Data

Approved Plots for 8 TeV Data

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The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using the PDF method on ttbar dilepton sample. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4 at the electromagnetic scale and then calibrated to the hadronic scale.

eps-file
png-file

PDFdilep.png
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The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using a tag and probe method based on kinematic selection on ttbar dilepton sample with two jets in the final state. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4, applying the local calibration scheme.

eps-file
png-file

ttbartopo.png

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using system8 method on muon-jet sample. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4 at the electromagnetic scale and then calibrated to the hadronic scale.

eps-file
png-file

system8.png

7 TeV Data

List of CONF Notes for 7 TeV Data

Approved Plots for 7 TeV Data

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency (overall simulation efficiency integrated for jets with pT > 15GeV and |η| < 2.5), extrapolated from a sample of c jets containing D* mesons analyzed for the 2011 data to a sample of inclusive c jets. The scale factors are with respect to a Pythia6 simulation.

eps-file
png-file

Scale_pt_MV1-70.png

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency (overall simulation efficiency integrated for jets with pT > 15GeV and |η| < 2.5), obtained by combining the dijet-based pTrel and system8 analyses with the ttbar-based kinematic fit (l+jets) and kinematic selection (dilepton sample) analyses for 2011 data.

eps-file
png-file

comb2011.png

Soft muon tagging multiplicity per jet. Jets of pseudorapidity |eta| < 1.8 and ET> 20 GeV were selected. Stacked histogram: simulation. Markers: 7 TeV data.
The following cuts have been applied to these muons:

  • pt > 4 GeV
  • |d0| < 4 mm
  • DR(Jet,Muon) < 0.4

eps-file
png-file
ntagsperjet_n7.png
Transverse momentum of the soft muon tagging candidate. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
png-file
softmupt_n48.png
Delta R (in etaxphi) between the muon and the jet. Stacked histogram: simulation. Markers: 7 TeV data.
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png-file
dr_n57.png
Matching chi2/dof of the combined muons. Combined muons correspond to a track fully reconstructed in the muon spectrometer and matched with a track in the inner detector. In the work presented here, the muon spectrometer track is extrapolated to the interaction point and is statistically combined to the inner detector track. The matching chi2 corresponds to this statistical combination. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
png-file
stacomatchchi2_n13.png
Impact parameter of the candidates with regard to the primary vertex. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
png-file
d0_n55.png
Impact parameter significance of the candidates with regard to the primary vertex. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
png-file
d0sig_n56.png
Transverse momentum with regard to the jet axis (pTrel) of the soft muon tagging candidates. To compute pTrel, the jet momentum is corrected by adding the muon momentum to it. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
png-file
ptrel_n58.png
Soft muon tagger weight, i.e. likelihood ratio of the pTrel variable for b and light jets. Combined and low-pT muons are treated in separate likelihoods, hence the dip in the weight distribution between 2 and 2.5. The low-pT muons tend to have a smaller weight than the combined muons. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
png-file
softmuweight_n9.png
This jet has all the characteristics of a b-jet with a semi-leptonic decay (to a muon).

Vertex Taggers:
The jet is tagged by both the JetProb and the SV0 tagger, with Jet probability = 1E-9 and SV0 L/sigma(L)= +24

Muon Tagger:
A combined muon with a likelihood ratio of 4.6, with the following properties:

  • Muon pT = 6 GeV
  • Muon d0 = 610 microns
  • Muon d0/sigma(d0) = 15
  • The muon is part of the SV0 secondary vertex.

eps-file
png-file
display4349994d.png

900 GeV Data

List of CONF Notes for 900 GeV Data


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Approved for first LHC runs can be found here. For newest results, check above CONF notes.
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Major updates:
-- JanStillings - 07-May-2010 -- ChristianWeiser - 11 Dec 2009 -- TomLeCompte - 12-Dec-2009

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Responsible: GianlucaPicco
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