Publikation: Zeitschriftenartikel

Measurement of the CKM angle using B±DK± with DK0S+, K0SK+K decays

Grunddaten
Abstract
Autoren
Einrichtung

Grunddaten

Titel	Measurement of the CKM angle using B±DK± with DK0S+, K0SK+K decays
Erscheinungsjahr	2018
Heft-Nr.	8
Jahr	2018
Publikationsform	Elektronische Ressource
Publikationsart	Zeitschriftenartikel
Sprache	Englisch
DOI	10.1007/JHEP08(2018)176
Letzte Änderung	19.09.2020 06:04:45
Bearbeitungsstatus	durch UB Rostock abschließend validiert
Dauerhafte URL	http://purl.uni-rostock.de/fodb/pub/64143
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Abstract

A binned Dalitz plot analysis of B± DK± decays, with D K S 0 + and D K S 0 K+K, is used to perform a measurement of the CP-violating observables x± and y±, which are sensitive to the Cabibbo-Kobayashi-Maskawa angle . The analysis is performed without assuming any D decay model, through the use of information on the strong-phase variation over the Dalitz plot from the CLEO collaboration. Using a sample of proton-proton collision data collected with the LHCb experiment in 2015 and 2016, and corresponding to an integrated luminosity of 2.0 fb1, the values of the CP violation parameters are found to be x = (9.0 ± 1.7 ± 0.7 ± 0.4) × 102, y = (2.1 ± 2.2 ± 0.5 ± 1.1) × 102, x+ = (7.7 ± 1.9 ± 0.7 ± 0.4) × 102, and y+ = (1.0 ± 1.9 ± 0.4 ± 0.9) × 102. The first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty (on the strong-phase measurements. These values are used to obtain = (87 12 + 11 ), rB = 0.086 0.014 + 0.013 , and B = (101±11)°, where rB is the ratio between the suppressed and favoured B-decay amplitudes and B is the corresponding strong-interaction phase difference. This measurement is combined with the result obtained using 2011 and 2012 data collected with the LHCb experiment, to give = (80 9 + 10 ), rB = 0.080 ± 0.011, and B = (110 ± 10)°. Open image in new window

Autoren

Aaij, Roel
D'Argent, Philippe
Bachmann, Sebastian
Berninghoff, Daniel
Braun, Svende
De Cian, Michel
Comerma-Montells, Albert
Dordei, Francesca
Dziewiecki, Michal
Gerick, David
Grünberg, Oliver
Han, Xiaoxue
Hansmann-Menzemer, Stephanie
Heß, Miriam
Kecke, Matthieu
Khanji, Basem
Kolpin, Michael
Kopecná, Renata
Leverington, Blake
Marks, Jörg
Meinert, Nis
Mitzel, Dominik
Neubert, Sebastian
Neuner, Max
Piucci, Alessio
Stahl, Marian
Stemmle, Simon
van Tilburg, Jeroen
Uwer, Ulrich
Viemann, Harald
Waldi, Roland
Zhelezov, Alexey
Grabowski, Jascha

Einrichtung

MNF/Institut für Physik (IfPH)