Publikation: Zeitschriftenartikel

Measurement of CP asymmetries and polarisation fractions in B0sK0K[bar]0 decays

Grunddaten
Abstract
Autoren
Einrichtung

Grunddaten

Titel	Measurement of CP asymmetries and polarisation fractions in B0sK0K[bar]0 decays
Veröffentlicht in	Journal of high energy physics : JHEP ; a refereed journal written, run, and distributed by electronic means. - Berlin : Springer
Erscheinungsjahr	2015
Seiten (von – bis)	166-1 – 166-28
Heft-Nr.	7
Jahr	2015
Publikationsform	Elektronische Ressource
Publikationsart	Zeitschriftenartikel
Sprache	Englisch
DOI	10.1007/JHEP07(2015)166
Letzte Änderung	02.12.2020 06:05:29
Bearbeitungsstatus	durch UB Rostock abschließend validiert
Dauerhafte URL	http://purl.uni-rostock.de/fodb/pub/49045
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Abstract

An angular analysis of the decay Bs0K0K¯0$$ {B}_s^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0} $$is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb1 collected by the LHCb experiment at a centre-of-mass energy s=7$$ \sqrt{s}=7 $$TeV. A combined angular and mass analysis separates six helicity amplitudes and allows the measurement of the longitudinal polarisation fraction fL= 0.201 ± 0.057 (stat.) ± 0.040 (syst.) for the Bs0K8920K¯8920$$ {B}_s^0\to {K}^{\ast }{(892)}^0{\overline{K}}^{\ast }{(892)}^0 $$decay. A large scalar contribution from the K0(1430) and K0(800) resonances is found, allowing the determination of additional CP asymmetries. Triple product and direct CP asymmetries are determined to be compatible with the Standard Model expectations. The branching fraction BsK8920K¯8920$$ \mathrm{\mathcal{B}}\left({B}_s\to {K}^{\ast }{(892)}^0{\overline{K}}^{\ast }{(892)}^0\right) $$is measured to be (10.8 ± 2.1 (stat.) ± 1.4 (syst.) ± 0.6 (fd/fs)) × 106.

Autoren

Aaij, Roel
Adeva, B.
Adinolfi, M.
Aquines Gutiérrez, Osvaldo
Bachmann, Sebastian
Bien, Alexander
Blouw, Johan
Britsch, Markward
Comerma-Montells, Albert
De Cian, Michel
Dordei, Francesca
Esen, Sevda
Färber, Christian
Fontana, Marianna
Gersabeck, Evelina
Grillo, Lucia
Han, Xiaoxue
Hansmann-Menzemer, Stephanie
Jäger, Andreas
Kolpin, Michael
Kreplin, Katharina
Krocker, Georg Alexander
Leverington, Blake
Marks, Jörg
Meißner, Marco
Neubert, Sebastian
Neuner, Max
Nikodem, Thomas
Schmelling, Michael
Seyfert, Paul
Stahl, Marian
Stahl, Sascha
Uwer, Ulrich
Vesterinen, Mika
Waldi, Roland
Voß, Christian
Wandernoth, Sebastian
Wiedner, Dirk
Zhelezov, Alexey

Einrichtung

MNF/Institut für Physik (IfPH)