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Report number arXiv:1612.03207 ; LHCB-PAPER-2016-044 ; CERN-EP-2016-287
Title Search for CP violation in the phase space of D0π+ππ+π decays
Author(s) LHCb Collaboration  Show all 773 authors
Publication 2017-06-10
Imprint 2016-12-09
Number of pages 12
Note All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-044.html
In: Phys. Lett. B 769 (2017) 345-356
DOI 10.1016/j.physletb.2017.03.062
Subject category hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Abstract A search for time-integrated CP violation in the Cabibbo-suppressed decay D0π+ππ+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 fb1 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.
Copyright/License preprint: © 2016-2024 CERN (License: CC-BY-4.0)
publication: © 2017-2024 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³
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 Record created 2016-12-15, last modified 2024-08-17


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