RT Journal Article
T1 First Measurement of the 𝐶⁢𝑃-Violating Phase in 𝐵0 𝑠 →𝜙⁢𝜙 Decays
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Álvarez Cartelle, Paula
A1 Dosil Suárez, Álvaro
A1 Fernández Albor, Víctor
A1 Gallas Torreira, Abraham
A1 Hernando Morata, José Ángel
A1 Pazos Álvarez, Antonio
A1 Pérez Trigo, Eliseo
A1 Pló Casasús, Máximo
A1 Rodríguez Pérez, P.
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Seco, M.
A1 Vázquez Regueiro, Pablo
K1 Penguin quantum loops
K1 𝐶⁢𝑃-Violating Phase
K1 Cabibbo-Kobayashi-Maskawa quark mixing matrix
AB A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B0s->phiphi decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between B0s-B0s mixing and the b ! sss  gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1:0 fb 1 and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 B0s->phiphi signal decays are obtained. The CP-violating phase is measured to be in the interval ½ 2:46;  0:76 rad at a 68% confidence level. The p value of the standard model prediction is 16%
PB American Physical Society
YR 2013
FD 2013-06-12
LK https://hdl.handle.net/10347/45025
UL https://hdl.handle.net/10347/45025
LA eng
NO R. Aaij40, C. Abellan Beteta35,o, B. Adeva et al. Phys. Rev. Lett. 110, 241802 – Published 12 June, 2013
NO We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staff at the LHCb institutes. We acknowledge support from CERN and from the national agencies CAPES, CNPq, FAPERJ, and FINEP (Brazil); NSFC (China); CNRS/IN2P3 and Region Auvergne (France); BMBF, DFG, HGF, and MPG (Germany); SFI (Ireland); INFN (Italy); FOM and NWO (The Netherlands); SCSR (Poland); ANCS/IFA (Romania); MinES, Rosatom, RFBR, and NRC “Kurchatov Institute” (Russia); MinECo, XuntaGal, and GENCAT (Spain); SNSF and SER (Switzerland); NAS Ukraine (Ukraine); STFC (United Kingdom); NSF (USA). We also acknowledge the support received from the ERC under FP7. The Tier1 Computing Centres are supported by IN2P3 (France), KIT and BMBF (Germany), INFN (Italy), NWO and SURF (The Netherlands), PIC (Spain), GridPP (United Kingdom). We are thankful for the computing resources put at our disposal by Yandex LLC (Russia), as well as to the communities behind the multiple open source software packages that we depend on
DS Minerva
RD 3 may 2026