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Search for CP violation in the phase space of D0→π+π−π+π− decays

A search for time-integrated CP violation in the Cabibbo-suppressed decay D0→π+π−π+π− is performed using an unbinned, model-independent technique known as the energy test. This is the first application of the energy test in four-body decays. The search is performed for P-even CP asymmetries and, for...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Braun, Svende (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Gersabeck, Evelina (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Kecke, Matthieu (Author) , Khanji, Basem (Author) , Krokovny, Pavel (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Piucci, Alessio (Author) , Schiller, Manuel (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Waldi, Roland (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 4 April 2017
In: Physics letters
Year: 2017, Volume: 769, Pages: 345-356
ISSN:1873-2445
DOI:10.1016/j.physletb.2017.03.062
Online Access:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1016/j.physletb.2017.03.062
Verlag, kostenfrei, Volltext: http://www.sciencedirect.com/science/article/pii/S0370269317302538
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Author Notes:LHCb collaboration
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Summary:A search for time-integrated CP violation in the Cabibbo-suppressed decay D0→π+π−π+π− is performed using an unbinned, model-independent technique known as the energy test. This is the first application of the energy test in four-body decays. The search is performed for P-even CP asymmetries and, for the first time, is extended to probe the P-odd case. Using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb detector at centre-of-mass energies of s=7 TeV and 8 TeV, the world's best sensitivity to CP violation in this decay is obtained. The data are found to be consistent with the hypothesis of CP symmetry with a p-value of (4.6±0.5)% in the P-even case, and marginally consistent with a p-value of (0.6±0.2)% in the P-odd case, corresponding to a significance for CP non-conservation of 2.7 standard deviations.
Item Description:Im Titel sind "0", "+" und "-" hochgestellt
Im Titel wird "pi" als griechischer Buchstabe dargestellt
LHCb collaboration: R. Aaij, P. d'Argent, S. Bachmann, S. Braun, A. Comerma-Montells, M. De Cian, S. Esen, D. Gerick, E. Gersabeck, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, P. Krokovny, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, T. Nikodem, A. Piucci, M. Schilller, M. Stahl, S. Stemmle, J. van Tilburg, U. Uwer, R. Waldi, A. Zhelezov [und weitere]
Gesehen am 31.08.2018
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2017.03.062

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