Angular Analysis of D0→π+π−μ+μ− and D0→K+K−μ+μ− Decays and Search for CP Violation

(LHCb Collaboration)

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The first full angular analysis and an updated measurement of the decay-rate CP asymmetry of the D0?p+p-µ+µ- and D0?K+K-µ+µ- decays are reported. The analysis uses proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. The dataset corresponds to an integrated luminosity of 9 fb-1. The full set of CP -averaged angular observables and their CP asymmetries are measured as a function of the dimuon invariant mass. The results are consistent with expectations from the standard model and with CP symmetry.
Original languageEnglish
Article number221801
Pages (from-to)1-11
Number of pages11
JournalPhysical review letters
Volume128
Issue number22
DOIs
Publication statusPublished - 3 Jun 2022

Funding

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).

FundersFunder number
Alexander von Humboldt-Stiftung
Narodowe Centrum Nauki
Ministerstwo Edukacji i Nauki
Automotive Research Center
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
Sociedad Española de Reumatología
National Academy of Sciences of Ukraine
National Natural Science Foundation of China
Bundesministerium für Bildung und Forschung
Ministerio de Ciencia e Innovación
Instituto Nazionale di Fisica Nucleare
CAS CCEPP
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministry of Science and Technology, Taiwan
Australian Research Data Commons
Centre National de la Recherche Scientifique
Agence Nationale de la Recherche
Conselho Nacional de Desenvolvimento Científico e Tecnológico
EPLANET
Deutsche Forschungsgemeinschaft
Financiadora de Estudos e Projetos
Institut national de physique nucléaire et de physique des particules
Chinese Academy of Sciences
CERN
Key Research Program of Frontier Sciences of CAS
Fundamental Research Funds for the Central Universities
Ministerstwo Edukacji i Nauki
Région Auvergne-Rhône-Alpes
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
H2020 Marie Skłodowska-Curie Actions
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Nuclear Physics
European Research Council
National Science Foundation
Science and Technology Facilities Council

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