Search for CP violation in the phase space of D0→π+π−π+π−decays
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Title: | Search for CP violation in the phase space of D0→π+π−π+π−decays |
Author: | LHCb Collaboration Adeva Andany, Bernardo Borsato, Martino Chobanova, Veronika Cid Vidal, Xabier Dosil Suárez, Álvaro Fernández Prieto, Antonio García Pardiñas, Julián Hernando Morata, José Ángel Lemos Cid, Edgar Lucio Martínez, Miriam Martínez Santos, Diego Plo Casasus, Máximo Prisciandaro, Jessica Ramos Pernas, Miguel Romero Vidal, Antonio Saborido Silva, Juan José Sanmartín Sedes, Brais Santamarina Ríos, Cibrán Vázquez Regueiro, Pablo Vieites Díaz, María Vázquez Sierra, Carlos Gallas Torreira, Abraham Antonio |
Affiliation: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE) |
Date of Issue: | 2017 |
Publisher: | Elsevier |
Citation: | Collaboration, L. (2017). Search for CP violation in the phase space of D0→ π π− π π− decays. Physics Letters B, 769, 345-356 |
Abstract: | 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. |
Publisher version: | https://doi.org/10.1016/j.physletb.2017.03.062 |
URI: | http://hdl.handle.net/10347/22484 |
DOI: | 10.1016/j.physletb.2017.03.062 |
ISSN: | 0370-2693 |
E-ISSN: | 1873-2445 |
Rights: | ©2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. |
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