Publikation: Zeitschriftenartikel

A new algorithm for identifying the flavour of B-s(0) mesons at LHCb

Grunddaten
Abstract
Autoren
Einrichtung

Grunddaten

Titel	A new algorithm for identifying the flavour of B-s(0) mesons at LHCb
Veröffentlicht in	Journal of Instrumentation. - London : Inst. of Physics
Erscheinungsjahr	2016
Seiten (von – bis)	05010-1 – 05010-18
Band	11
Heft-Nr.	05
Jahr	2016
Publikationsform	Elektronische Ressource
Publikationsart	Zeitschriftenartikel
Sprache	Englisch
DOI	10.1088/1748-0221/11/05/P05010
Letzte Änderung	11.07.2020 06:05:10
Bearbeitungsstatus	durch UB Rostock abschließend validiert
Dauerhafte URL	http://purl.uni-rostock.de/fodb/pub/52429
Links zu Katalogen

Abstract

A new algorithm for the determination of the initial flavour of B0s mesons is presented. The algorithm is based on two neural networks and exploits the b hadron production mechanism at a hadron collider. The first network is trained to select charged kaons produced in association with the B0s meson. The second network combines the kaon charges to assign the B0s flavour and estimates the probability of a wrong assignment. The algorithm is calibrated using data corresponding to an integrated luminosity of 3 fb1 collected by the LHCb experiment in proton-proton collisions at 7 and 8 TeV centre-of-mass energies. The calibration is performed in two ways: by resolving the B0s-B0s flavour oscillations in B0s Ds+ decays, and by analysing flavour-specific B*s2(5840)0 B+K decays. The tagging power measured in B0s Ds+ decays is found to be (1.80 ± 0.19 (stat) ± 0.18 (syst))%, which is an improvement of about 50% compared to a similar algorithm previously used in the LHCb experiment.

Autoren

Aaij, Roel
Beteta, C. Abellan
Adeva, B.
D'Argent, Philippe
Bachmann, Sebastian
Braun, Svende
Britsch, Markward
Comerma-Montells, Albert
De Cian, Michel
Esen, Sevda
Gerick, David
Gersabeck, Evelina
Grillo, Lucia
Grünberg, Oliver
Han, Xiaoxue
Hansmann-Menzemer, Stephanie
Jäger, Andreas
Kecke, Matthieu
Kolpin, Michael
Kreplin, Katharina
Leverington, Blake
Marks, Jörg
Meißner, Marco
Mitzel, Dominik
Neubert, Sebastian
Neuner, Max
Nikodem, Thomas
Piucci, Alessio
Stahl, Marian
Uwer, Ulrich
Vesterinen, Mika
Zhelezov, Alexey

Einrichtung

MNF/Institut für Physik (IfPH)