CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−

diagramas, ilustraciones a color, tablas

Autores:: Nuñez Palacio, Rafael David

Tipo de recurso:

Fecha de publicación:: 2021

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:: eng

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network_acronym_str	UNACIONAL2
network_name_str	Universidad Nacional de Colombia
repository_id_str
dc.title.eng.fl_str_mv	CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−
dc.title.translated.spa.fl_str_mv	Sensibilidad CP del analisis Daliz plot de la desintegración B0→K0sK+K−
title	CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−
spellingShingle	CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K− 530 - Física Dispersión Dispersion LHCb experiment Flavour Dalitz plot CP Experimento LHCb Sabor Dalitz plot Partícula elemental Elementary particles
title_short	CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−
title_full	CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−
title_fullStr	CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−
title_full_unstemmed	CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−
title_sort	CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−
dc.creator.fl_str_mv	Nuñez Palacio, Rafael David
dc.contributor.advisor.none.fl_str_mv	Milanés Carreño, Diego Alejandro
dc.contributor.author.none.fl_str_mv	Nuñez Palacio, Rafael David
dc.contributor.researchgroup.spa.fl_str_mv	Grupo de Partículas FENYX-UN
dc.subject.ddc.spa.fl_str_mv	530 - Física
topic	530 - Física Dispersión Dispersion LHCb experiment Flavour Dalitz plot CP Experimento LHCb Sabor Dalitz plot Partícula elemental Elementary particles
dc.subject.other.none.fl_str_mv	Dispersión Dispersion
dc.subject.proposal.eng.fl_str_mv	LHCb experiment Flavour Dalitz plot CP
dc.subject.proposal.spa.fl_str_mv	Experimento LHCb Sabor Dalitz plot
dc.subject.unesco.none.fl_str_mv	Partícula elemental Elementary particles
description	diagramas, ilustraciones a color, tablas
publishDate	2021
dc.date.accessioned.none.fl_str_mv	2021-05-26T16:27:55Z
dc.date.available.none.fl_str_mv	2021-05-26T16:27:55Z
dc.date.issued.none.fl_str_mv	2021-05-12
dc.type.spa.fl_str_mv	Trabajo de grado - Maestría
dc.type.driver.spa.fl_str_mv	info:eu-repo/semantics/masterThesis
dc.type.version.spa.fl_str_mv	info:eu-repo/semantics/acceptedVersion
dc.type.content.spa.fl_str_mv	Text
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status_str	acceptedVersion
dc.identifier.uri.none.fl_str_mv	https://repositorio.unal.edu.co/handle/unal/79566
dc.identifier.instname.spa.fl_str_mv	Universidad Nacional de Colombia
dc.identifier.reponame.spa.fl_str_mv	Repositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourl.spa.fl_str_mv	https://repositorio.unal.edu.co/
url	https://repositorio.unal.edu.co/handle/unal/79566 https://repositorio.unal.edu.co/
identifier_str_mv	Universidad Nacional de Colombia Repositorio Institucional Universidad Nacional de Colombia
dc.language.iso.spa.fl_str_mv	eng
language	eng
dc.relation.references.spa.fl_str_mv	[1] J. H. Christenson, J. W. Cronin, V. L. Fitch, and R. Turlay, “Evidence for the 2πdecay of thek02meson,”Phys. Rev. Lett., vol. 13, pp. 138–140, Jul 1964. [Online].Available: https://link.aps.org/doi/10.1103/PhysRevLett.13.138 [2] K. o. Abe, “Observation of largeCPviolation in the neutralBmesonsystem,”Phys. Rev. Lett., vol. 87, p. 091802, Aug 2001. [Online]. Available:https://link.aps.org/doi/10.1103/PhysRevLett.87.091802 [3] B. Aubertet al., “Observation ofCPviolation in theb0meson system,”Phys. Rev. Lett., vol. 87, p. 091801, Aug 2001. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRevLett.87.091801 [4] M. Kobayashi and T. Maskawa, “CP Violation in the Renormalizable Theory of WeakInteraction,”Prog. Theor. Phys., vol. 49, pp. 652–657, 1973. [5] N. Aghanimet al., “Planck 2018 results. VI. Cosmological parameters,”Astron. As-trophys., vol. 641, p. A6, 2020. [6] A. A. Alves, Jr.et al., “The LHCb Detector at the LHC,”JINST, vol. 3, p. S08005,2008. [7] A. Wuthrich, “Dalitz plots and hadron spectroscopy,” Ph.D. dissertation, Bern U., 2005. [8] Lees, J. P., et al, “Study ofcpviolation in dalitz-plot analyses ofB0→K+K−K0S,B+→K+K−K+, andB+→K0SK0SK+,”Phys. Rev. D, vol. 85, p. 112010, Jun 2012.[Online]. Available: https://link.aps.org/doi/10.1103/PhysRevD.85.112010 [9] Y. Nakahama, et al, “Measurement ofcpviolating asymmetries inB0→K+K−K0Sdecays with a time-dependent dalitz approach,”Phys. Rev. D, vol. 82, p. 073011, Oct2010. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRevD.82.073011 [10] Y. Nakahamaet al., “Measurement of CP violating asymmetries inB0−> K+K−K0Sdecays with a time-dependent Dalitz approach,”Phys. Rev., vol. D82, p. 073011, 2010 [11] J. P. Leeset al., “Study of CP violation in Dalitz-plot analyses of B0 —¿K+K-K0(S),B+ —¿K+K-K+, and B+ —¿K0(S)K0(S)K+,”Phys. Rev., vol. D85, p. 112010, 2012. [12] M. Baalouch, E. Ben-Haim, T. Gershon, M. Grabalosa, L. Henry, T. Latham,J. McCarthy, J. Maratas, D. Milanes, S. Monteil, R. Silva Coutinho, and N. Watson,“Dalitz-plot analysis of the decayB0→K0SK+K−,” Apr 2014. [Online]. Available:https://cds.cern.ch/record/1694299 [13] N. Cabibbo, “Unitary symmetry and leptonic decays,”Phys. Rev. Lett., vol. 10, pp.531–533, Jun 1963. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRevLett.10.531 [14] M. R ̈ohrken,Time-Dependent CP Violation Measurements: Analyses of NeutralB Meson to Double-Charm Decays at the Japanese Belle Experiment, ser.Springer Theses.Springer International Publishing, 2013. [Online]. Available:https://books.google.com.co/books?id=2Om5BAAAQBAJ [15] L. Wolfenstein, “Parametrization of the kobayashi-maskawa matrix,”Phys. Rev. Lett.,vol. 51, pp. 1945–1947, Nov 1983. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRevLett.51.1945 [16] M. Bargiotti, A. Bertin, M. Bruschi, M. Capponi, S. Castro, R. Dona, P. Faccioli,D. Galli, B. Giacobbe, U. Marconi, I. Massa, M. Piccinini, M. Poli, N. Semprini-Cesari,R. Spighi, V. Vagnoni, S. Vecchi, M. Villa, A. Vitale, and A. Zoccoli, “Present knowledgeof the cabibbo-kobayashi-maskawa matrix,”Rivista del Nuovo Cimento, vol. 23, 01 2000. [17] Particle Data Group and others, “Review of Particle Physics,”Progress of Theoreticaland Experimental Physics, vol. 2020, no. 8, 08 2020, 083C01. [Online]. Available:https://doi.org/10.1093/ptep/ptaa104 [18] The CKMfitter Group, “UPDATED RESULTS ON THE CKM MATRIX,”Dic 2019. [Online]. Available: http://ckmfitter.in2p3.fr/www/results/plotssummer19/num/ckmEvalresultssummer19.html [19] O. Steinkamp, “CP violation at LHCb,”J. Phys. Conf. Ser., vol. 455, p. 012036, 2013 [20] I. I. Bigi and A. I. Sanda,CP Violation, 2nd ed. Cambridge University Press, 2009. [21] C.-W. Chiang, M. Gronau, Z. Luo, J. L. Rosner, and D. A. Suprun, “Charmless→BVPdecays using flavor su(3) symmetry,”Phys. Rev. D, vol. 69, p. 034001, Feb 2004.[Online]. Available: https://link.aps.org/doi/10.1103/PhysRevD.69.034001 [22] T. Aaltonenet al., “First Flavor-Tagged Determination of Bounds on Mixing-InducedCP Violation inB0s→J/ψφDecays,”Phys. Rev. Lett., vol. 100, p. 161802, 2008 [23] V. M. Abazovet al., “Measurement ofB0smixing parameters from the flavor-taggeddecayB0s→J/ψφ,”Phys. Rev. Lett., vol. 101, p. 241801, 2008 [24] R. Aaijet al., “Observation of CP Violation in Charm Decays,”Phys. Rev. Lett., vol.122, no. 21, p. 211803, 2019 [25] J. Backet al., “LAURA++: A Dalitz plot fitter,”Comput. Phys. Commun., vol. 231,pp. 198–242, 2018 [26] D. J. Herndon, P. S ̈oding, and R. J. Cashmore, “Generalized isobar modelformalism,”Phys. Rev. D, vol. 11, pp. 3165–3182, Jun 1975. [Online]. Available:https://link.aps.org/doi/10.1103/PhysRevD.11.3165 [27] C. Zemach, “Three-pion decays of unstable particles,”Phys. Rev., vol. 133, pp. B1201–B1220, Mar 1964. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRev.133.B1201 [28] J. Blatt and V. E. Weisskopf,Theoretical nuclear physics, 1952. [29] D. P. O’Hanlon, “Studies ofCP-violation in charmless three-bodyb-hadron decays,” Sep2017, presented 04 Oct 2017. [Online]. Available: https://cds.cern.ch/record/2289593 [30] G. Breit and E. Wigner, “Capture of slow neutrons,”Phys. Rev., vol. 49, pp. 519–531,Apr 1936. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRev.49.519 [31] S. Flatt ́e, “Coupled-channel analysis of theπηand kk systems near kk threshold,”Physics Letters B, vol. 63, no. 2, pp. 224 – 227, 1976. [Online]. Available:http://www.sciencedirect.com/science/article/pii/0370269376906547 [32] M. A. et al, “Resonances inj/ψ→φππandφkk,”Physics Letters B, vol. 607,no. 3, pp. 243 – 253, 2005. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0370269304017265 [33] H.-Y. Cheng, C.-K. Chua, and A. Soni, “Charmless three-body decays ofbmesons,”Phys. Rev. D, vol. 76, p. 094006, Nov 2007. [Online]. Available:https://link.aps.org/doi/10.1103/PhysRevD.76.094006 [34] D. M. Asneret al., “Search for CP violation in D0 —¿K0(S) pi+ pi-,”Phys. Rev., vol.D70, p. 091101, 2004 [35] A. B. et al’, “Amplitude analysis of the decayB±→π±π±π∓,”Phys. Rev. D, vol. 72,p. 052002, Sep 2005. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRevD.72.052002 [36] L. Lyons,Statistics for Nuclear and Particle Physicists. Cambridge University Press,1986. [37] Lyons and Demortier,Everything you always wanted to know about pulls.CDF/ANAL/PUBLIC/5776, 2002 [38] R. H. Dalitz, “On the analysis of tau-meson data and the nature of the tau-meson,”Phil. Mag. Ser.7, vol. 44, pp. 1068–1080, 1953 [40] D. Dorfan, J. Enstrom, D. Raymond, M. Schwartz, S. Wojcicki, D. H.Miller, and M. Paciotti, “Charge asymmetry in the muonic decay of theK20,”Phys. Rev. Lett., vol. 19, pp. 987–993, Oct 1967. [Online]. Available:https://link.aps.org/doi/10.1103/PhysRevLett.19.987 [41] S. Bennett, D. Nygren, H. Saal, J. Steinberger, and J. Sunderland, “Measurement ofthe charge asymmetry in the decayKL0→π±+e∓+ν,”Phys. Rev. Lett., vol. 19, pp.993–997, Oct 1967. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRevLett.19.993 [42] S. W. Herbet al., “Observation of a Dimuon Resonance at 9.5-GeV in 400-GeV Proton-Nucleus Collisions,”Phys. Rev. Lett., vol. 39, pp. 252–255, 1977 [43] C. Bebeket al., “Evidence for New Flavor Production at the Upsilon (4S),”Phys. Rev.Lett., vol. 46, p. 84, 1981. [44] L. J. Spenceret al., “Measurement ofBMeson Semileptonic Decay,”Phys. Rev. Lett.,vol. 47, pp. 771–774, 1981 [45] E. Fernandezet al., “Lifetime of Particles Containing B Quarks,”Phys. Rev. Lett.,vol. 51, p. 1022, 1983 [46] N. S. Lockyer, J. A. Jaros, M. E. Nelson, G. S. Abrams, D. Amidei, A. R. Baden,C. A. Blocker, A. M. Boyarski, M. Breidenbach, P. Burchat, D. L. Burke, J. M.Dorfan, G. J. Feldman, G. Gidal, L. Gladney, M. S. Gold, G. Goldhaber, L. Golding,G. Hanson, D. Herrup, R. J. Hollebeek, W. R. Innes, M. Jonker, I. Juricic, J. A.Kadyk, A. J. Lankford, R. R. Larsen, B. LeClaire, M. Levi, V. L ̈uth, C. Matteuzzi,R. A. Ong, M. L. Perl, B. Richter, M. C. Ross, P. C. Rowson, T. Schaad,H. Schellman, D. Schlatter, P. D. Sheldon, J. Strait, G. H. Trilling, C. de laVaissiere, J. M. Yelton, and C. Zaiser, “Measurement of the lifetime of bottomhadrons,”Phys. Rev. Lett., vol. 51, pp. 1316–1319, Oct 1983. [Online]. Available:https://link.aps.org/doi/10.1103/PhysRevLett.51.1316 [47] H. Albrechtet al., “Observation of B0 - anti-B0 Mixing,”Phys. Lett., vol. B192, pp.245–252, 1987, [,51(1987)]. [48] I. I. Y. Bigi and A. I. Sanda, “CP Violation in Heavy Flavor Decays: Predictions andSearch Strategies,”Nucl. Phys., vol. B281, pp. 41–71, 1987. [49] D. Boutignyet al., “BaBar technical design report,” inBaBar Technical Design ReportEPAC Meeting Stanford, California, March 17-18, 1995, 1995. [Online]. Available:http://www.slac.stanford.edu/BFROOT/doc/TDR [50] M. T. Chenget al., “A Study of CP violation in B meson decays: Technical designreport,” 1995. [51] HFLAV. (2018) Heavy flavor averaging group. [Online]. Available: https://hflav.web.cern.ch [52] Y. Amhiset al., “Averages ofb-hadron,c-hadron, andτ-lepton properties as of summer2016,”Eur. Phys. J., vol. C77, no. 12, p. 895, 2017 [53] L. Henry, “Charmless hadronic three-body decays of neutralBmesons with aK0sin the final state in the LHCb experiment: branching fractions and an amplitudeanalysis: D ́esint ́egrations hadroniques `a trois corps sans charme de m ́esonsBavec unK0sdans l’ ́etat final dans l’exp ́erience LHCb : mesure de rapports d’embranchementet une analyse en amplitude,” Sep 2016, presented 30 Sep 2016. [Online]. Available:https://cds.cern.ch/record/2239050 [54] T. Latham, “Charmless three-body decays of b-hadrons,” inMeeting of the APS Divi-sion of Particles and Fields, 10 2013 [55] R. 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dc.rights.uri.spa.fl_str_mv	http://creativecommons.org/licenses/by-nc-nd/4.0/
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rights_invalid_str_mv	Atribución-NoComercial-SinDerivadas 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ http://purl.org/coar/access_right/c_abf2
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dc.format.extent.spa.fl_str_mv	1 recurso en línea (138 páginas)
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dc.publisher.spa.fl_str_mv	Universidad Nacional de Colombia
dc.publisher.program.spa.fl_str_mv	Bogotá - Ciencias - Maestría en Ciencias - Física
dc.publisher.department.spa.fl_str_mv	Departamento de Física
dc.publisher.faculty.spa.fl_str_mv	Facultad de Ciencias
dc.publisher.place.spa.fl_str_mv	Bogotá
dc.publisher.branch.spa.fl_str_mv	Universidad Nacional de Colombia - Sede Bogotá
institution	Universidad Nacional de Colombia
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spelling	Atribución-NoComercial-SinDerivadas 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Milanés Carreño, Diego Alejandro0cb1fc6bacb170f2b17b9f31777bf004Nuñez Palacio, Rafael David5ae82a00ee56c12fffbc412637002a9dGrupo de Partículas FENYX-UN2021-05-26T16:27:55Z2021-05-26T16:27:55Z2021-05-12https://repositorio.unal.edu.co/handle/unal/79566Universidad Nacional de ColombiaRepositorio Institucional Universidad Nacional de Colombiahttps://repositorio.unal.edu.co/diagramas, ilustraciones a color, tablasWe studied the weak three-body $B^0 \rightarrow K^0_s K^+ K^-$ decay at the LHCb experiment in the LHC at CERN. We validated the uncertainty on the CP observables using the current Dalitz plot analyses results from Run 1 and studied the uncertainties expected for Run 2 and Run 3. Using the simulation of the experimental conditions like the B-tagging (flavour of the $B^0$), the detector efficiencies and the number of events for the different data taking conditions, we have determined the expected precision of the CP-violating asymmetries of the flavour specific resonant modes, and we have shown evidence that analysis of the real data for Run 2 and Run 3 data taking periods could provide competitive $A_{cp}$ values compared with some of the actual measurements. Se estudió la desintegración a tres cuerpos $B^0 \rightarrow K^0_s K^+ K^-$ generada por el experimento LHCb (Large Hadron Collider beauty) en el LHC (Large Hadron Collider) del CERN (Conseil Européen pour la Recherche Nucléaire). Se validaron las incertidumbres en las contribuciones en los observables CP de las resonancias involucradas en los resultados actuales para la primera etapa de funcionamiento del experimento y se estudiaron los resultados esperados para las segunda y tercera etapas. Usando para ello la simulación de las condiciones experimentales como el sabor del $B^0$, las eficiencias del detector y el número de eventos esperados. Se determinó la precisión esperada en las medidas de la asimetría de violación CP para cada resonancia involucrada, y se mostró evidencia de que el análisis de los datos reales correspondientes a las segunda y tercera etapas del experimento podrían aportar medidas competitivas de $A_{cp}$, comparadas con los resultados actuales.Se estudió la desintegración a tres cuerpos B0 → K0s K+K− generada por el experimento LHCb (Large Hadron Collider beauty) en el LHC (Large Hadron Collider) del CERN (Conseil Européen pour la Recherche Nucl´eaire). Se validaron las incertidumbres en las contribuciones en los observables CP de las resonancias involucradas en los resultados actuales para la primera etapa de funcionamiento del experimento y se estudiaron los resultados esperados para las segunda y tercera etapas. Usando para ello la simulación de las condiciones experimentales como el sabor del B0 , las eficiencias del detector y el número de eventos esperados. Se determinó la precisión esperada en las medidas de la asimetría de violación CP para cada resonancia involucrada, y se mostró evidencia de que el análisis de los datos reales correspondientes a las segunda y tercera etapas del experimento podrían aportar medidas competitivas de Acp, comparadas con los resultados actuales.MaestríaMaestría en Ciencias - FísicaMagíster en Ciencias - FísicaFísica Experimental de Altas Energías1 recurso en línea (138 páginas)application/pdfengUniversidad Nacional de ColombiaBogotá - Ciencias - Maestría en Ciencias - FísicaDepartamento de FísicaFacultad de CienciasBogotáUniversidad Nacional de Colombia - Sede Bogotá530 - FísicaDispersiónDispersionLHCb experimentFlavourDalitz plotCPExperimento LHCbSaborDalitz plotPartícula elementalElementary particlesCP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−Sensibilidad CP del analisis Daliz plot de la desintegración B0→K0sK+K−Trabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TM[1] J. H. Christenson, J. W. Cronin, V. L. Fitch, and R. Turlay, “Evidence for the 2πdecay of thek02meson,”Phys. Rev. Lett., vol. 13, pp. 138–140, Jul 1964. [Online].Available: https://link.aps.org/doi/10.1103/PhysRevLett.13.138[2] K. o. Abe, “Observation of largeCPviolation in the neutralBmesonsystem,”Phys. Rev. Lett., vol. 87, p. 091802, Aug 2001. [Online]. Available:https://link.aps.org/doi/10.1103/PhysRevLett.87.091802[3] B. Aubertet al., “Observation ofCPviolation in theb0meson system,”Phys. Rev. Lett., vol. 87, p. 091801, Aug 2001. [Online]. Available: https://link.aps.org/doi/10.1103/PhysRevLett.87.091801[4] M. Kobayashi and T. Maskawa, “CP Violation in the Renormalizable Theory of WeakInteraction,”Prog. Theor. Phys., vol. 49, pp. 652–657, 1973.[5] N. Aghanimet al., “Planck 2018 results. VI. Cosmological parameters,”Astron. As-trophys., vol. 641, p. A6, 2020.[6] A. A. Alves, Jr.et al., “The LHCb Detector at the LHC,”JINST, vol. 3, p. S08005,2008.[7] A. 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Aaijet al., “Physics case for an LHCb Upgrade II - Opportunities in flavour physics,and beyond, in the HL-LHC era,” 8 2018.LICENSElicense.txtlicense.txttext/plain; charset=utf-83964https://repositorio.unal.edu.co/bitstream/unal/79566/1/license.txtcccfe52f796b7c63423298c2d3365fc6MD51ORIGINALTesis_MSc_Rafa_Final.pdfTesis_MSc_Rafa_Final.pdfTesis de Maestría en Ciencias - Físicaapplication/pdf3370306https://repositorio.unal.edu.co/bitstream/unal/79566/2/Tesis_MSc_Rafa_Final.pdfa68003a17b009d76cf28678608c9287fMD52THUMBNAILTesis_MSc_Rafa_Final.pdf.jpgTesis_MSc_Rafa_Final.pdf.jpgGenerated Thumbnailimage/jpeg4244https://repositorio.unal.edu.co/bitstream/unal/79566/3/Tesis_MSc_Rafa_Final.pdf.jpg7bf527542bb9276c4e4202afc4d1da6bMD53unal/79566oai:repositorio.unal.edu.co:unal/795662023-07-20 23:03:22.426Repositorio Institucional Universidad Nacional de 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GVyZWNob3MgZGUgYXV0b3IgcXVlIGNvbmxsZXZlIGxhIGRpc3RyaWJ1Y2nDs24gZGUgZXN0b3MgYXJjaGl2b3MgeSBtZXRhZGF0b3MuCkFsIGhhY2VyIGNsaWMgZW4gZWwgc2lndWllbnRlIGJvdMOzbiwgdXN0ZWQgaW5kaWNhIHF1ZSBlc3TDoSBkZSBhY3VlcmRvIGNvbiBlc3RvcyB0w6lybWlub3MuCgpVTklWRVJTSURBRCBOQUNJT05BTCBERSBDT0xPTUJJQSAtIMOabHRpbWEgbW9kaWZpY2FjacOzbiAyNy8yMC8yMDIwCg==

CP sensitivity Dalitz plot analysis of the decay B0→K0sK+K−

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