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Measurement of the CKM angle γ using B 0 → DK *0 with D → K 0S π + π − decays

A model-dependent amplitude analysis of the decay B0 → D(KS0π+π−)K∗ 0 is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1, recorded at s=7$$ \sqrt{s}=7 $$and 8 TeV by the LHCb experiment. The CP violation observables x± and y±, sensitive to the CKM a...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Braun, Svende (Author) , Britsch, Markward (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Gersabeck, Evelina (Author) , Grillo, Lucia (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Jäger, Andreas (Author) , Kecke, Matthieu (Author) , Kolpin, Michael (Author) , Kreplin, Katharina (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Piucci, Alessio (Author) , Stahl, Marian (Author) , Uwer, Ulrich (Author) , Vesterinen, Mika (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 24 August 2016
In: Journal of high energy physics
Year: 2016, Issue: 8
ISSN:1029-8479
DOI:10.1007/JHEP08(2016)137
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP08(2016)137
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Author Notes:The LHCb collaboration*
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Summary:A model-dependent amplitude analysis of the decay B0 → D(KS0π+π−)K∗ 0 is performed using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1, recorded at s=7$$ \sqrt{s}=7 $$and 8 TeV by the LHCb experiment. The CP violation observables x± and y±, sensitive to the CKM angle γ, are measured to bex−=−0.15±0.14±0.03±0.01,y−=0.25±0.15±0.06±0.01,x+=0.05±0.24±0.04±0.01,y+=−0.65−0.23+0.24±0.08±0.01,$$ \begin{array}{l}{x}_{-}=-0.15\pm 0.14\pm 0.03\pm 0.01,\hfill \\ {}{y}_{-}=0.25\pm 0.15\pm 0.06\pm 0.01,\hfill \\ {}{x}_{+}=0.05\pm 0.24\pm 0.04\pm 0.01,\hfill \\ {}{y}_{+}=-{0.65}_{-0.23}^{+0.24}\pm 0.08\pm 0.01,\hfill \end{array} $$where the first uncertainties are statistical, the second systematic and the third arise from the uncertainty on the D → KS0π+π− amplitude model. These are the most precise measurements of these observables. They correspond to γ = (80− 22+ 21)° and rB0=0.39±0.13$$ {r}_{B^0}=0.39\pm 0.13 $$, where rB0$$ {r}_{B^0} $$is the magnitude of the ratio of the suppressed and favoured B0 → DK+π− decay amplitudes, in a Kπ mass region of ±50 MeV around the K*(892)0 mass and for an absolute value of the cosine of the K*0 decay angle larger than 0.4.
Item Description:*The LHCb collaboration: R. Aaij, P. D'Argent, S. Bachmann, S. Braun, M. Britsch, A. Comerma-Montells, M. De Cian, S. Esen, D. Gerick, E. Gersabeck, L. Grillo, X. Han, S. Hansmann-Menzemer, A. Jaeger, M. Kecke, M. Kolpin, K. Kreplin, B. Leverington, J. Marks, M. Meissner, D.S. Mitzel, S. Neubert, M. Neuner, T. Nikodem, A. Piucci, M. Stahl, U. Uwer, M. Vesterinen, A. Zhelezov [und sehr viele weitere Personen]
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Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP08(2016)137

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