First Measurement of the đ¶âąđ‘ƒ-Violating Phase in đ”0 𝑠 →𝜙ⁱ𝜙 Decays

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dc.contributor.affiliationUniversidade de Santiago de Compostela. Instituto Galego de FĂ­sica de Altas EnerxĂ­as (IGFAE)
dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de FĂ­sica de PartĂ­culas
dc.contributor.authorLHCb Collaboration
dc.contributor.authorAdeva Andany, Bernardo
dc.contributor.authorÁlvarez Cartelle, Paula
dc.contributor.authorDosil Suårez, Álvaro
dc.contributor.authorFernĂĄndez Albor, VĂ­ctor
dc.contributor.authorGallas Torreira, Abraham
dc.contributor.authorHernando Morata, José Ángel
dc.contributor.authorPazos Álvarez, Antonio
dc.contributor.authorPĂ©rez Trigo, Eliseo
dc.contributor.authorPlĂł CasasĂșs, MĂĄximo
dc.contributor.authorRodrĂ­guez PĂ©rez, P.
dc.contributor.authorRomero Vidal, Antonio
dc.contributor.authorSaborido Silva, Juan José
dc.contributor.authorSanmartĂ­n Sedes, Brais
dc.contributor.authorSantamarina RĂ­os, CibrĂĄn
dc.contributor.authorSeco, M.
dc.contributor.authorVĂĄzquez Regueiro, Pablo
dc.date.accessioned2026-01-12T10:02:40Z
dc.date.available2026-01-12T10:02:40Z
dc.date.issued2013-06-12
dc.description.abstractA 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 œ 2:46; 0:76 rad at a 68% confidence level. The p value of the standard model prediction is 16%
dc.description.peerreviewedSI
dc.description.sponsorshipWe 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
dc.identifier.citationR. Aaij40, C. Abellan Beteta35,o, B. Adeva et al. Phys. Rev. Lett. 110, 241802 – Published 12 June, 2013
dc.identifier.doi10.1103/PhysRevLett.110.241802
dc.identifier.essn1079-7114
dc.identifier.urihttps://hdl.handle.net/10347/45025
dc.issue.number24
dc.journal.titlePhysical Review Letters
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.publisherversionhttps://doi.org/10.1103/PhysRevLett.110.241802
dc.rights2013 CERN, for the LHCb Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License
dc.rightsAttribution 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectPenguin quantum loops
dc.subjectđ¶âąđ‘ƒ-Violating Phase
dc.subjectCabibbo-Kobayashi-Maskawa quark mixing matrix
dc.titleFirst Measurement of the đ¶âąđ‘ƒ-Violating Phase in đ”0 𝑠 →𝜙ⁱ𝜙 Decays
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number110
dspace.entity.typePublication
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