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Observation of the suppressed Λ0b→DpK− decay with D→K+π− and measurement of its CP asymmetry

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LHCb Collaboration (Including:

Abdelmotteleb, A. S. W., Abudinen Gallego, F. J., Back, J. J., Beck, A., Blake, Thomas, Brosso Gonzalo, A., Cicala, M. F., Costa Sobral, Cayo, Garcia Martin, L. M., Gershon, T. J. et al.
). (2022) Observation of the suppressed Λ0b→DpK− decay with D→K+π− and measurement of its CP asymmetry. Physical Review D (Particles, Fields, Gravitation and Cosmology), 104 (11). 112008 . doi:10.1103/PhysRevD.104.112008

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Official URL: https://doi.org/10.1103/PhysRevD.104.112008

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Abstract

A study of Λ0b baryon decays to the DpK− final state is presented based on a proton-proton collision data sample corresponding to an integrated luminosity of 9  fb−1 collected with the LHCb detector. Two
Λ0b decays are considered, Λ0b→DpK− with D→K−π+ and D→K+π−, where D represents a superposition of D0 and ¯D0 states. The latter process is expected to be suppressed relative to the former, and is observed for the first time. The ratio of branching fractions of the two decays is measured, and the CP asymmetry of the suppressed mode, which is sensitive to the Cabibbo-Kobayashi-Maskawa angle γ, is also reported.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Particles (Nuclear physics), Hadrons -- Scattering, Quantum chromodynamics
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: 27 December 2022
Dates:
DateEvent
27 December 2022Published
12 October 2021Accepted
Volume: 104
Number: 11
Article Number: 112008
DOI: 10.1103/PhysRevD.104.112008
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDCERNhttp://dx.doi.org/10.13039/100012470
UNSPECIFIEDCoordenação de Aperfeiçoamento de Pessoal de Nível Superiorhttp://dx.doi.org/10.13039/501100002322
UNSPECIFIEDConselho Nacional de Desenvolvimento Científico e Tecnológicohttp://dx.doi.org/10.13039/501100003593
UNSPECIFIEDFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeirohttp://dx.doi.org/10.13039/501100004586
UNSPECIFIEDFinanciadora de Estudos e Projetoshttp://dx.doi.org/10.13039/501100004809
UNSPECIFIED[MSTPRC] Ministry of Science and Technology of the People's Republic of Chinahttp://dx.doi.org/10.13039/501100002855
UNSPECIFIED[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
UNSPECIFIED[CNRS] Centre National de la Recherche Scientifiquehttp://dx.doi.org/10.13039/501100004794
UNSPECIFIED[IN2P3] Institut national de physique nucléaire et de physique des particuleshttp://viaf.org/viaf/137207166
UNSPECIFIEDBundesministerium für Bildung und Forschunghttp://dx.doi.org/10.13039/501100002347
UNSPECIFIED[DFG] Deutsche Forschungsgemeinschafthttp://dx.doi.org/10.13039/501100001659
UNSPECIFIEDMax-Planck-Gesellschafthttp://dx.doi.org/10.13039/501100004189
UNSPECIFIED[INFN] Instituto Nazionale di Fisica Nuclearehttp://dx.doi.org/10.13039/501100004007
UNSPECIFIED[NWO] Nederlandse Organisatie voor Wetenschappelijk Onderzoekhttp://dx.doi.org/10.13039/501100003246
UNSPECIFIEDMinisterstwo Nauki i Szkolnictwa Wyższegohttp://dx.doi.org/10.13039/501100004569
UNSPECIFIEDNarodowe Centrum Naukihttp://dx.doi.org/10.13039/501100004281
UNSPECIFIEDMinisterul Educatiei Nationalehttp://dx.doi.org/10.13039/501100003766
UNSPECIFIEDInstitutul de Fizică Atomicăhttp://viaf.org/viaf/154740159
UNSPECIFIED[MES] Ministry of Education and Science of the Russian Federationhttp://dx.doi.org/10.13039/501100003443
UNSPECIFIEDRussia. Federal'noe agentstvo nauc?nych organizacij [Federal Agency for Scientific Organizations] (FASO)UNSPECIFIED
UNSPECIFIED[MINECO] Ministerio de Economía y Competitividadhttp://dx.doi.org/10.13039/501100003329
UNSPECIFIED[SNSF] Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschunghttp://dx.doi.org/10.13039/501100001711
UNSPECIFIED[SERI] Staatssekretariat für Bildung, Forschung und Innovationhttp://dx.doi.org/10.13039/501100007352
UNSPECIFIEDNational Academy of Sciences of Ukrainehttp://dx.doi.org/10.13039/501100004742
UNSPECIFIED[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271
UNSPECIFIEDNational Science Foundationhttp://dx.doi.org/10.13039/100000001
UNSPECIFIEDKarlsruher Institut für Technologiehttp://dx.doi.org/10.13039/100009133
UNSPECIFIEDDeutsches Elektronen-Synchrotronhttp://dx.doi.org/10.13039/501100001647
UNSPECIFIEDNetherlands. SURFsara (Organisation)UNSPECIFIED
UNSPECIFIEDSpain. Port d'Informació Científica (Organisation)UNSPECIFIED
UNSPECIFIEDGreat Britain. Distributed Computing for Data-Intensive Research (GridPP)UNSPECIFIED
UNSPECIFIEDRossiĭskiĭ nauchnyĭ t︠s︡entr "Kurchatovskiĭ institut" http://viaf.org/viaf/147389325
UNSPECIFIEDI︠A︡ndeks (Firm)http://viaf.org/viaf/138596770
UNSPECIFIEDSwiss National Supercomputing CentreUNSPECIFIED
UNSPECIFIEDInstitutul Na?ional de Fizic? ?i Inginerie Nuclear? - Horia Hulubei M?gurelehttp://viaf.org/viaf/139349611
UNSPECIFIEDCentro brasileiro de pesquisas fisicashttp://viaf.org/viaf/124062514
PL-Grid project (Polish Infrastructure for Supporting Computational Science in the European Research Space)[ERDF] European Regional Development Fundhttp://dx.doi.org/10.13039/501100008530
UNSPECIFIEDOhio Supercomputer Centerhttp://viaf.org/viaf/131669411
UNSPECIFIEDAlexander von Humboldt-Stiftunghttp://dx.doi.org/10.13039/100005156
EPLANETEuropean Commissionhttp://dx.doi.org/10.13039/501100000780
UNSPECIFIEDH2020 Marie Skłodowska-Curie Actionshttp://dx.doi.org/10.13039/100010665
UNSPECIFIEDEuropean Research Council http://viaf.org/viaf/130022607
UNSPECIFIEDConseil Général de Haute-SavoieUNSPECIFIED
UNSPECIFIEDLabEx ENIGMASSUNSPECIFIED
UNSPECIFIEDRégion Auvergne (France)UNSPECIFIED
UNSPECIFIED[RFBR] Russian Foundation for Basic Researchhttp://dx.doi.org/10.13039/501100002261
UNSPECIFIEDGeneralitat Valencianahttp://dx.doi.org/10.13039/501100003359
UNSPECIFIEDSecretaria Xeral de Investigación e Desenvolvemento, Xunta de Galiciahttp://dx.doi.org/10.13039/501100010568
UNSPECIFIEDGeneralitat de Catalunyahttp://dx.doi.org/10.13039/501100002809
UNSPECIFIEDHerchel Smith FundUNSPECIFIED
UNSPECIFIED[RS] Royal Societyhttp://dx.doi.org/10.13039/501100000288
UNSPECIFIEDRoyal Commission for the Exhibition of 1851http://dx.doi.org/10.13039/501100000700
UNSPECIFIEDLeverhulme Trusthttp://dx.doi.org/10.13039/501100000275
UNSPECIFIED UNSPECIFIED

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