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Amplitude analysis of the Bs0 → K∗0K[bar]∗0 decays and measurement of the branching fraction of the B0 → K∗0K[bar]∗0 decay

The B0→K∗0K¯∗0$$ {B}^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0} $$ and Bs0→K∗0K¯∗0$$ {B}_s^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0} $$ decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb−1. An untagged and timeintegrated amplitude analysis of B(s)0 →...

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Main Authors: Aaij, Roel (Author) , Bachmann, Sebastian (Author) , Berninghoff, Daniel (Author) , Borsato, Martino (Author) , Braun, Svende (Author) , Comerma-Montells, Albert (Author) , D'Argent, Philippe (Author) , Dziewiecki, Michal (Author) , Gerick, David (Author) , Grabowski, Jascha (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Heß, Miriam (Author) , Hu, Jiangqiao (Author) , Kecke, Matthieu (Author) , Kolpin, Michael (Author) , Kopecná, Renata (Author) , Leverington, Blake (Author) , Malygina, Hanna (Author) , Marks, Jörg (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Piucci, Alessio (Author) , Schmelling, Michael (Author) , Skidmore, Nicola (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Waldi, Roland (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Other Authors: Uwer, Ulrich (Other)
Format: Article (Journal)
Language:English
Published: July 5, 2019
In: Journal of high energy physics
Year: 2019, Issue: 7
ISSN:1029-8479
DOI:10.1007/JHEP07(2019)032
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP07(2019)032
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Author Notes:the LHCb collaboration
Description
Summary:The B0→K∗0K¯∗0$$ {B}^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0} $$ and Bs0→K∗0K¯∗0$$ {B}_s^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0} $$ decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb−1. An untagged and timeintegrated amplitude analysis of B(s)0 → (K+π−)(K−π+) decays in two-body invariant mass regions of 150 MeV/c2 around the K∗0 mass is performed. A stronger longitudinal polarisation fraction in the B0→K∗0K¯∗0$$ {B}^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0} $$ decay, fL = 0.724 ± 0.051 (stat) ± 0.016 (syst), is observed as compared to fL = 0.240 ± 0.031 (stat) ± 0.025 (syst) in the Bs0→K∗0K¯∗0$$ {B}_s^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0} $$ decay. The ratio of branching fractions of the two decays is measured and used to determine ℬB0→K∗0K¯∗0=8.0±0.9stat±0.4syst×10−7$$ \mathrm{\mathcal{B}}\left({B}^0\to {K}^{\ast 0}{\overline{K}}^{\ast 0}\right)=\left(8.0\pm 0.9\left(\mathrm{stat}\right)\pm 0.4\left(\mathrm{syst}\right)\right)\times {10}^{-7} $$.
Item Description:Im Titel ist die "0" bei den Buchstaben B und K hochgestellt, "s" tiefgestellt und in Klammern
Im Titel ist beim ersten und dritten K "∗" hochgestellt
Im Titel ist das zweite und vierte "K" mit einem Oberstrich dargestellt, "∗" und "0" stehen rechts neben dem Oberstrich
The LHCb Collaboration: R. Aaij, S. Bachmann, D. Berninghoff, M. Borsato, S. Braun, A. Comerma-Montells, P. d’Argent, M. Dziewiecki, D. Gerick, J.P. Grabowski, X. Han, S. Hansmann-Menzemer, M. Heß, J. Hu, M. Kecke, M. Kolpin, R. Kopecna, B. Leverington, H. Malygina, J. Marks, D.S. Mitzel, S. Neubert, A. Piucci, M. Schmelling, N. Skidmore, M. Stahl, S. Stemmle, U. Uwer, R. Waldi, A. Zhelezov [und viele weitere]
Gesehen am 12.05.2020
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP07(2019)032

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