TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2017
DA  - 2017//
TI  - Search for CP violation in the phase space of D-0 -> pi(+)pi(-)pi(+)pi(-) decays
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 345
EP  - 356
VL  - 769
PB  - Elsevier Science Bv
AB  - A search for time-integrated CP violation in the Cabibbo-suppressed decay D-0 -> pi(+)pi(-)pi(+)pi(-) 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 root 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.
SN  - 0370-2693
UR  - http://arxiv.org/abs/1612.03207
UR  - https://doi.org/10.1016/j.physletb.2017.03.062
DO  - 10.1016/j.physletb.2017.03.062
LA  - English
N1  - WOS:000402342500054
ID  - LHCbCollaborationAaij_etal2017
ER  -