Search for CP violation in Ξb- →pK-K- decays

LHCb Collaboration

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A search for CP violation in charmless three-body Ξb-→pK-K- decays is performed using pp collision data recorded with the LHCb detector, corresponding to integrated luminosities of 1 fb-1 at a center-of-mass energy s=7 TeV, 2 fb-1 at s=8 TeV and 2 fb-1 at s=13 TeV. A good description of the phase-space distribution is obtained with an amplitude model containing contributions from ς(1385), Λ(1405), Λ(1520), Λ(1670), ς(1775) and ς(1915) resonances. The model allows for CP -violation effects, which are found to be consistent with zero. The branching fractions of Ξb-→ς(1385)K-, Ξb-→Λ(1405)K-, Ξb-→Λ(1520)K-, Ξb-→Λ(1670)K-, Ξb-→ς(1775)K- and Ξb-→ς(1915)K- decays are also reported. In addition, an upper limit is placed on the product of ratios of ωb- and Ξb- fragmentation fractions and the ωb-→pK-K- and Ξb-→pK-K- branching fractions.

Original languageEnglish
Article number052010
JournalPhysical Review D
Issue number5
Publication statusPublished - 1 Sept 2021

Bibliographical note

Funding Information:
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); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MSHE (Russia); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (USA). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), RRCKI and Yandex LLC (Russia), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), PL-GRID (Poland) and NERSC (USA). We are indebted to the communities behind the multiple open-source software packages on which we depend. Individual groups or members have received support from ARC and ARDC (Australia); AvH Foundation (Germany); EPLANET, Marie Skłodowska-Curie Actions and ERC (European Union); A*MIDEX, ANR, IPhU and Labex P2IO, and Région Auvergne-Rhône-Alpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); RFBR, RSF and Yandex LLC (Russia); GVA, XuntaGal and GENCAT (Spain); the Leverhulme Trust, the Royal Society and UKRI (United Kingdom).

Publisher Copyright:
© 2021 CERN.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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