Performance of b-jet identification in the ATLAS experiment

Atlas Collaboration, K. Cranmer, A. Haas, A. I. Mincer, P. Nemethy

Research output: Contribution to journalReview article

Abstract

The identification of jets containing b hadrons is important for the physics programme of the ATLAS experiment at the Large Hadron Collider. Several algorithms to identify jets containing b hadrons are described, ranging from those based on the reconstruction of an inclusive secondary vertex or the presence of tracks with large impact parameters to combined tagging algorithms making use of multi-variate discriminants. An independent b-tagging algorithm based on the reconstruction of muons inside jets as well as the b-tagging algorithm used in the online trigger are also presented. The b-jet tagging efficiency, the c-jet tagging efficiency and the mistag rate for light flavour jets in data have been measured with a number of complementary methods. The calibration results are presented as scale factors defined as the ratio of the efficiency (or mistag rate) in data to that in simulation. In the case of b jets, where more than one calibration method exists, the results from the various analyses have been combined taking into account the statistical correlation as well as the correlation of the sources of systematic uncertainty.

Original languageEnglish (US)
Article numberP04008
JournalJournal of Instrumentation
Volume11
Issue number4
DOIs
StatePublished - Apr 4 2016

Fingerprint

Tagging
marking
Experiment
Hadrons
Experiments
hadrons
Calibration
statistical correlation
Scale factor
Flavors
Colliding beam accelerators
Discriminant
Trigger
muons
apexes
Physics
actuators
Uncertainty
physics
Vertex of a graph

Keywords

  • Large detector systems for particle and astroparticle physics
  • Large detector-systems performance
  • Pattern recognition, cluster finding, calibration and fitting methods
  • Performance of High Energy Physics Detectors

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Atlas Collaboration, Cranmer, K., Haas, A., Mincer, A. I., & Nemethy, P. (2016). Performance of b-jet identification in the ATLAS experiment. Journal of Instrumentation, 11(4), [P04008]. https://doi.org/10.1088/1748-0221/11/04/P04008

Performance of b-jet identification in the ATLAS experiment. / Atlas Collaboration; Cranmer, K.; Haas, A.; Mincer, A. I.; Nemethy, P.

In: Journal of Instrumentation, Vol. 11, No. 4, P04008, 04.04.2016.

Research output: Contribution to journalReview article

Atlas Collaboration, Cranmer, K, Haas, A, Mincer, AI & Nemethy, P 2016, 'Performance of b-jet identification in the ATLAS experiment', Journal of Instrumentation, vol. 11, no. 4, P04008. https://doi.org/10.1088/1748-0221/11/04/P04008
Atlas Collaboration, Cranmer K, Haas A, Mincer AI, Nemethy P. Performance of b-jet identification in the ATLAS experiment. Journal of Instrumentation. 2016 Apr 4;11(4). P04008. https://doi.org/10.1088/1748-0221/11/04/P04008
Atlas Collaboration ; Cranmer, K. ; Haas, A. ; Mincer, A. I. ; Nemethy, P. / Performance of b-jet identification in the ATLAS experiment. In: Journal of Instrumentation. 2016 ; Vol. 11, No. 4.
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