First Measurement of the 𝐶⁢𝑃-Violating Phase in 𝐵0 𝑠 →𝜙⁢𝜙 Decays

Thumbnail Image

Files

2013_PhysRevLet_Aaaij_Measurement.pdf (293.88 KB)
Identifiers
URI: https://hdl.handle.net/10347/45025
E-ISSN: 1079-7114
DOI: 10.1103/PhysRevLett.110.241802

Publication date

2013-06-12

Authors

Advisors

Tutors

Editors

Journal Title

Journal ISSN

Volume Title

Publisher

American Physical Society
Metrics
Google Scholar
lacobus
Export

Research Projects

Organizational Units

Journal Issue

Abstract

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%

Description

Keywords

Penguin quantum loops| 𝐶⁢𝑃-Violating Phase| Cabibbo-Kobayashi-Maskawa quark mixing matrix

Bibliographic citation

R. Aaij40, C. Abellan Beteta35,o, B. Adeva et al. Phys. Rev. Lett. 110, 241802 – Published 12 June, 2013

Relation

Has part

Has version

Is based on

Is part of

Is referenced by

Is version of

Requires

Sponsors

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

Rights

2013 CERN, for the LHCb Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License
Attribution 4.0 International

Collections

Física de Partículas
Instituto Galego de Física de Altas Enerxías (IGFAE)