Measurement of the time-integrated CP asymmetry in D 0 → KS 0 KS 0 decays

The Lhcb Collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

A measurement of the time-integrated CP asymmetry in D0 → KS 0KS 0 decays is reported. The data correspond to an integrated luminosity of about 2 fb−1 collected in 2015–2016 by the LHCb collaboration in pp collisions at a centre-of-mass energy of 13 TeV. The D0 candidate is required to originate from a D*+ → D0π+ decay, allowing the determination of the flavour of the D0 meson using the pion charge. The D0 → K+K decay, which has a well measured CP asymmetry, is used as a calibration channel. The CP asymmetryfor D0 → KS 0KS 0 is measured to beACP(D0→KS0KS0)=(4.3±3.4±1.0)%,where the first uncertainty is statistical and the second is systematic. This result is combined with the previous LHCb measurement at lower centre-of-mass energies to obtainACP(D0→KS0KS0)=(2.3±2.8±0.9)%.[Figure not available: see fulltext.].

Original languageEnglish
Article number48
Pages (from-to)1-19
Number of pages19
JournalJournal of High Energy Physics
Volume2018
Issue number11
Early online date8 Nov 2018
DOIs
Publication statusPublished - Nov 2018

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); MinES and FASO (Russia); MinECo (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); 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 Open Access, Copyright CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3.

FundersFunder number
Not addedST/J004332/1, ST/N000250/1, ST/N000447/1, ST/K003410/1, 1796908, ST/N000234/1, ST/N000463/1, ST/N000455/1, ST/L003163/1, ST/N000242/1
AvH Foundation
CNRS/IN2P3
FASO
Herchel Smith Fund
Marie Sklo dowska-Curie Actions
MinES
OCEVU
Yandex LLC
National Science Foundation
School of Energy Resources, University of Wyoming
CERN
College of Arts and Sciences, University of Nebraska-Lincoln
Science and Technology Facilities Council1681016, LHCb, LHCb Upgrades
Leverhulme Trust
Royal Society
English-Speaking Union
European Commission
European Research Council
Deutsche Forschungsgemeinschaft
Agence Nationale de la Recherche
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung166208
National Natural Science Foundation of China
Russian Foundation for Basic Research
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Bundesministerium für Bildung und Forschung
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Generalitat Valenciana
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Ministry of Science and Technology
Instituto Nazionale di Fisica Nucleare
Narodowe Centrum Nauki
Ministerstwo Nauki i Szkolnictwa Wyższego
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
National Academy of Sciences of Ukraine
Financiadora de Estudos e Projetos
Russian Science Foundation
Région Auvergne-Rhône-Alpes
Recruitment Program of Global Experts

    Keywords

    • Charm physics
    • CP violation
    • Flavor physics
    • Hadron-Hadron scattering (experiments)

    Fingerprint

    Dive into the research topics of 'Measurement of the time-integrated CP asymmetry in D 0 → KS 0 KS 0 decays'. Together they form a unique fingerprint.

    Cite this