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Measurement of the electron reconstruction efficiency at LHCb

The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb−1 of pp collision data recorded with the LHCb detector in 2017. This measurement exploits B+→ J/ψ(e+e−)K+ decays, where one of the electrons is fully reconstructed and paired with the kaon, while...

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Hauptverfasser: Aaij, Roel (VerfasserIn) , Archilli, Flavio (VerfasserIn) , Bachmann, Sebastian (VerfasserIn) , Berninghoff, Daniel (VerfasserIn) , Borsato, Martino (VerfasserIn) , Comerma-Montells, Albert (VerfasserIn) , D'Argent, Philippe (VerfasserIn) , Dziewiecki, Michal (VerfasserIn) , Gerick, David (VerfasserIn) , Grabowski, Jascha (VerfasserIn) , Han, Xiaoxue (VerfasserIn) , Hansmann-Menzemer, Stephanie (VerfasserIn) , Hu, Jiangqiao (VerfasserIn) , Kecke, Matthieu (VerfasserIn) , Kopecná, Renata (VerfasserIn) , Leverington, Blake (VerfasserIn) , Malygina, Hanna (VerfasserIn) , Marks, Jörg (VerfasserIn) , Neubert, Sebastian (VerfasserIn) , Piucci, Alessio (VerfasserIn) , Skidmore, Nicola (VerfasserIn) , Stemmle, Simon (VerfasserIn) , Uwer, Ulrich (VerfasserIn) , Viemann, Harald (VerfasserIn) , Waldi, Roland (VerfasserIn) , Zhelezov, Alexey (VerfasserIn)
Körperschaft: LHCb Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 22 November 2019
In: Journal of Instrumentation
Year: 2019, Jahrgang: 14
ISSN:1748-0221
DOI:10.1088/1748-0221/14/11/P11023
Online-Zugang:Verlag, kostenfrei, Volltext: https://dx.doi.org/10.1088/1748-0221/14/11/P11023
Volltext
Verfasserangaben:The LHCb Collaboration*
Beschreibung
Zusammenfassung:The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb−1 of pp collision data recorded with the LHCb detector in 2017. This measurement exploits B+→ J/ψ(e+e−)K+ decays, where one of the electrons is fully reconstructed and paired with the kaon, while the other electron is reconstructed using only the information of the vertex detector. Despite this partial reconstruction, kinematic and geometric constraints allow the B meson mass to be reconstructed and the signal to be well separated from backgrounds. This in turn allows the electron reconstruction efficiency to be measured by matching the partial track segment found in the vertex detector to tracks found by LHCb's regular reconstruction algorithms. The agreement between data and simulation is evaluated, and corrections are derived for simulated electrons in bins of kinematics. These correction factors allow LHCb to measure branching fractions involving single electrons with a systematic uncertainty below 1%.
Beschreibung:Gesehen am 21.02.2020
*The LHCb Collaboration: R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, A. Comerma-Montells, P. D'Argent, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, J. Hu, M. Kecke, R. Kopecna, B. Leverington, H. Malygina, J. Marks, S. Neubert, A. Piucci, N. Skidmore, S. Stemmle, U. Uwer, H. Viemann, R. Waldi, A. Zhelezov [und 886 weitere Personen]
Beschreibung:Online Resource
ISSN:1748-0221
DOI:10.1088/1748-0221/14/11/P11023

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