RT Journal Article
T1 Search for CP violation in the phase space of D0→π+π−π+π−decays
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Borsato, Martino
A1 Chobanova, Veronika
A1 Cid Vidal, Xabier
A1 Dosil Suárez, Álvaro
A1 Fernández Prieto, Antonio
A1 García Pardiñas, Julián
A1 Hernando Morata, José Ángel
A1 Lemos Cid, Edgar
A1 Lucio Martínez, Miriam
A1 Martínez Santos, Diego
A1 Plo Casasus, Máximo
A1 Prisciandaro, Jessica
A1 Ramos Pernas, Miguel
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Vázquez Regueiro, Pablo
A1 Vieites Díaz, María
A1 Vázquez Sierra, Carlos
A1 Gallas Torreira, Abraham Antonio
AB A search for time-integrated CPviolation 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 CPasymmetries and, for the first time, is extended to probe the P-odd case. Using proton–proton collision data corresponding to an integrated luminosity of 3.0fb−1collected by the LHCb detector at centre-of-mass energies of √s=7TeVand 8TeV, the world’s best sensitivity to CPviolation in this decay is obtained. The data are found to be consistent with the hypothesis of CPsymmetry 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 CPnon-conservation of 2.7 standard deviations.
PB Elsevier
SN 0370-2693
YR 2017
FD 2017
LK http://hdl.handle.net/10347/22484
UL http://hdl.handle.net/10347/22484
LA eng
NO Collaboration, L. (2017). Search for CP violation in the phase space of D0→ π π− π π− decays. Physics Letters B, 769, 345-356
DS Minerva
RD 28 abr 2026