| ATLAS Note | |
| Report number | ATLAS-CONF-2018-001 |
| Title | Measurement of $b$-tagging Efficiency of $c$-jets in $t\bar{t}$ Events Using a Likelihood Approach with the ATLAS Detector |
| Corporate Author(s) | The ATLAS collaboration |
| Collaboration | ATLAS Collaboration |
| Publication | 2018 |
| Imprint | 02 Mar 2018 |
| Number of pages | mult. |
| Note | All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2018-001 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ATLAS |
| Abstract | A new technique is presented to measure the rate at which charm jets are tagged as $b$-jets based on a data sample of single lepton $t\bar{t}$ events, where one of the $W$-bosons decays leptonically and the other decays to a $c$- and $s$-quark, or other quark pair combinations. The data sample was collected by the ATLAS detector at $\sqrt{s} = 13$ TeV in 2015 and 2016 and corresponds to an integrated luminosity of 36 fb$^{-1}$. A kinematic likelihood technique is used to assign jets to the corresponding $t\bar{t}$ decay products. A likelihood fit is used to extract the $c$-jet tagging efficiency from the pair of jets associated to $W$-boson decays. This new technique is used to calibrate the ATLAS MV2c10 $b$-tagging algorithm. |
| Related document | superseded by: CERN-EP-2021-166 |
| Copyright/License | Preprint: (License: CC-BY-4.0) |
Corresponding record in: Inspire
Record created 2018-03-02, last modified 2021-09-21
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