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Measurement of CP asymmetries and polarisation fractions in B0s→K∗0K[bar]∗0 decays

An angular analysis of the decay Bs0→K∗0K¯∗0 is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment at a centre-of-mass energy √s=7 TeV. A combined angular and mass analysis separates six helicity amplitudes and allows the measurement...

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Main Authors: Aaij, Roel (Author) , Adeva, B. (Author) , Adinolfi, M. (Author) , Aquines Gutiérrez, Osvaldo (Author) , Bachmann, Sebastian (Author) , Bien, Alexander (Author) , Blouw, Johan (Author) , Britsch, Markward (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Dordei, Francesca (Author) , Esen, Sevda (Author) , Färber, Christian (Author) , Fontana, Marianna (Author) , Gersabeck, Evelina (Author) , Grillo, Lucia (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Jäger, Andreas (Author) , Kolpin, Michael (Author) , Kreplin, Katharina (Author) , Krocker, Georg Alexander (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Schmelling, Michael (Author) , Seyfert, Paul (Author) , Stahl, Marian (Author) , Stahl, Sascha (Author) , Uwer, Ulrich (Author) , Vesterinen, Mika (Author) , Waldi, Roland (Author) , Voß, Christian (Author) , Wandernoth, Sebastian (Author) , Wiedner, Dirk (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: July 30, 2015
In: Journal of high energy physics
Year: 2015, Issue: 7
ISSN:1029-8479
DOI:10.1007/JHEP07(2015)166
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP07(2015)166
Verlag, Volltext: http://download.springer.com/static/pdf/86/art%253A10.1007%252FJHEP07%25282015%2529166.pdf?originUrl=
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Author Notes:the LHCb collaboration
Description
Summary:An angular analysis of the decay Bs0→K∗0K¯∗0 is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment at a centre-of-mass energy √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 Bs0→K∗8920K¯∗8920 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 ℬBs→K∗8920K¯∗8920 is measured to be (10.8 ± 2.1 (stat.) ± 1.4 (syst.) ± 0.6 (fd/fs)) × 10−6.
Item Description:Im Titel steht "K" mit Oberstrich
Im Titel sind "0" und "s" untereinander geschrieben: "0" hochgestellt, "s" tiefgestellt
Im Titel sind "∗" und "0" hochgestellt
The LHCb Collaboration: R. Aaij, O. Aquines Gutierrez, B. Adeva, M. Adinolfi, S. Bachmann, A. Bien, J. Blouw, M. Britsch, A. Comerma-Montells, M. De Cian, F. Dordei, S. Esen, C. Faerber, M. Fontana, E. Gersabeck, L. Grillo, X. Han, S. Hansmann-Menzemer, A. Jaeger, M. Kolpin, K. Kreplin, G. Krocker, B. Leverington, J. Marks, M. Meissner, J. Neubert, M. Neuner, T. Nikodem, M. Schmelling, P. Seyfert, M. Stahl, S. Stahl, U. Uwer, M. Vesterinen, R. Waldi, C. Voss, S. Wandernoth, D. Wiedner, A. Zhelezov [und 668 weitere]
Gesehen am 23.11.2020
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP07(2015)166

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