Performance of b-Jet Identification in the ATLAS Experiment

Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Performance of b-Jet Identification in the ATLAS Experiment. Journal of instrumentation, 11(04), P04008-P04008. Institute of Physics Publishing IOP 10.1088/1748-0221/11/04/P04008

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics
500 Science > 510 Mathematics

ISSN:

1748-0221

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Annette Krebs-Wegenast

Date Deposited:

14 Aug 2017 08:56

Last Modified:

20 Aug 2017 02:17

Publisher DOI:

10.1088/1748-0221/11/04/P04008

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.

BORIS DOI:

10.7892/boris.99994

URI:

https://boris.unibe.ch/id/eprint/99994

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