Observation of the Decay D0 →k-π+e+e-

(B a B ar Collaboration)

doi:10.1103/PhysRevLett.122.081802

Observation of the Decay D0 →k-π+e+e-

(B a B ar Collaboration)

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

We report the observation of the rare charm decay D0→K-π+e+e-, based on 468 fb-1 of e+e- annihilation data collected at or close to the center-of-mass energy of the (4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. We find the branching fraction in the invariant mass range 0.675<m(e+e-)<0.875 GeV/c2 of the electron-positron pair to be B(D0→K-π+e+e-)=(4.0±0.5±0.2±0.1)×10-6, where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty in the branching fraction of the decay D0→K-π+π+π- used as a normalization mode. The significance of the observation corresponds to 9.7 standard deviations including systematic uncertainties. This result is consistent with the recently reported D0→K-π+μ+μ- branching fraction, measured in the same invariant mass range, and with the value expected in the standard model. In a set of regions of m(e+e-), where long-distance effects are potentially small, we determine a 90% confidence level upper limit on the branching fraction B(D0→K-π+e+e-)<3.1×10-6.

Original language	English
Article number	081802
Journal	Physical Review Letters
Volume	122
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.122.081802
State	Published - 27 Feb 2019

Funding

Funders	Funder number
Stichting voor Fundamenteel Onderzoek der Materie
National Science and Technology fund
Agence Nationale de la Recherche
Marie Curie EIF
IFIN-HH
Ministry of Education and Science
USA-Israel
Labex
National Academy of Sciences of Ukraine
Federal Agency for Scientific Organizations
University of Washington College of Arts and Sciences
Narodowe Centrum Nauki
OCEVU
National Science Foundation
National 1000 Talents Program of China
Institut National de Physique Nucléaire et de Physique des Particules
H2020 Marie Skłodowska-Curie Actions
Région Auvergne
CNRS-IN2P3
Shanghai Key Laboratory for Particle Physics and Cosmology
Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministry of Science and Technology, Taiwan
Herchel Smith Fund
Leverhulme Trust
Royal Commission for the Exhibition of 1851
PL-GRID
SURF
Instituto Nazionale di Fisica Nucleare
Norsk Sykepleierforbund
Financiadora de Estudos e Projetos
Ministerio de Economía y Competitividad
Rijksuniversiteit Groningen
Centre National de la Recherche Scientifique
Max-Planck-Gesellschaft
Bundesministerium für Bildung und Forschung
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Karlsruhe Institute of Technology
Labex ENIGMASS
European Commission
Région Auvergne-Rhône-Alpes
California Department of Fish and Game
Russian Foundation for Basic Research
Ministry of Science and Technology
GSI Helmholtzzentrum für Schwerionenforschung
NFR
Bundesministerium für Bildung und Frauen
Office of Strategic Coordination
National Science Foundation
English-Speaking Union
Yandex LLC
California Department of Fish and Wildlife
RuG
Bloom's Syndrome Foundation
British Skin Foundation
GridPP
MinES
RRCKI
Russian Science Foundation
Alfred P. Sloan Foundation
School of Energy Resources, University of Wyoming
Deutsches Elektronen-Synchrotron
Narodowym Centrum Nauki
NSERC (Canada), CEA
Chinese Academy of Sciences
Recruitment Program of Global Experts
Poultry Industry Council
Royal Society
Sociedad Española de Reumatología
INPAC
European Research Council
EPLANET
NSFC (China) CNRS/IN2P3
Ministerstwo Nauki i Szkolnictwa Wyższego
Generalitat Valenciana
CERN
Vetenskapsrådet
Alexander von Humboldt-Stiftung
University of South Alabama
Conseil Général de Haute-Savoie
Foundation for Fundamental Research on Matter
Not added	ST/N000250/1, ST/N000331/1, GRIDPP, 1681016, ST/G005974/1, 1708182, LHCb, ST/L003538/1, ST/N000455/1, ST/N001370/1, ST/K004646/1, ST/N000242/1, ST/H006737/1, ST/K00140X/1, LHCb Upgrades, 1707993, ST/M004058/1, ST/J004332/1, 1641747, ST/N000447/1, ST/K003410/1, 1796908, ST/N000463/1, ST/N000234/1, ST/L003163/1, ST/N000420/1
CAS Center for Excellence in Particle Physics	U1532257, U1532258, KJCX2-YW-N29, KJCX2-YW-N45, QYZDJ-SSW-SLH003, U1332201
CAS Center for Excellence in Particle Physics
Not added	unidentified
Deutsche Forschungsgemeinschaft	CRC 1044, FOR 2359
Deutsche Forschungsgemeinschaft
Ministry of Development of Turkey	DPT2006K-120470
National Research Foundation of Korea	R32-2008-000-10155-0
National Research Foundation of Korea
Beijing municipal government	CIT&TCD201704047, 2015000020124G064, KM201610017009
U.S. Department of Energy	DE-FG02-05ER41374, DE-SC-0010504, DE-SC-0010118, DE-SC-0012069
U.S. Department of Energy
National Key Research and Development Program of China	2015CB856700
National Key Research and Development Program of China
Koninklijke Nederlandse Akademie van Wetenschappen	530-4CDP03
Koninklijke Nederlandse Akademie van Wetenschappen
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	166208
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
National Natural Science Foundation of China	11425524, 11125525, 11322544, 11235011, 11335008, 11505010, 11305180, 11275266
National Natural Science Foundation of China

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10.1103/PhysRevLett.122.081802

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title = "Observation of the Decay D0 →k-π+e+e-",

abstract = "We report the observation of the rare charm decay D0→K-π+e+e-, based on 468 fb-1 of e+e- annihilation data collected at or close to the center-of-mass energy of the (4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. We find the branching fraction in the invariant mass range 0.675",

author = "{(B a B ar Collaboration)} and Lees, {J. P.} and V. Poireau and V. Tisserand and E. Grauges and A. Palano and G. Eigen and Brown, {D. N.} and Kolomensky, {Yu G.} and M. Fritsch and H. Koch and T. Schroeder and C. Hearty and Mattison, {T. S.} and McKenna, {J. A.} and So, {R. Y.} and Blinov, {V. E.} and Buzykaev, {A. R.} and Druzhinin, {V. P.} and Golubev, {V. B.} and Kozyrev, {E. A.} and Kravchenko, {E. A.} and Onuchin, {A. P.} and Serednyakov, {S. I.} and Skovpen, {Yu I.} and Solodov, {E. P.} and Todyshev, {K. Yu} and Lankford, {A. J.} and Gary, {J. W.} and O. Long and Eisner, {A. M.} and Lockman, {W. S.} and {Panduro Vazquez}, W. and Chao, {D. S.} and Cheng, {C. H.} and B. Echenard and Flood, {K. T.} and Hitlin, {D. G.} and J. Kim and Y. Li and Miyashita, {T. S.} and P. Ongmongkolkul and Porter, {F. C.} and M. R{\"o}hrken and Z. Huard and Meadows, {B. T.} and Pushpawela, {B. G.} and Sokoloff, {M. D.} and L. Sun and Smith, {J. G.} and A. Soffer",

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year = "2019",

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doi = "10.1103/PhysRevLett.122.081802",

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AU - Lees, J. P.

AU - Poireau, V.

AU - Tisserand, V.

AU - Grauges, E.

AU - Palano, A.

AU - Eigen, G.

AU - Brown, D. N.

AU - Kolomensky, Yu G.

AU - Fritsch, M.

AU - Koch, H.

AU - Schroeder, T.

AU - Hearty, C.

AU - Mattison, T. S.

AU - McKenna, J. A.

AU - So, R. Y.

AU - Blinov, V. E.

AU - Buzykaev, A. R.

AU - Druzhinin, V. P.

AU - Golubev, V. B.

AU - Kozyrev, E. A.

AU - Kravchenko, E. A.

AU - Onuchin, A. P.

AU - Serednyakov, S. I.

AU - Skovpen, Yu I.

AU - Solodov, E. P.

AU - Todyshev, K. Yu

AU - Lankford, A. J.

AU - Gary, J. W.

AU - Long, O.

AU - Eisner, A. M.

AU - Lockman, W. S.

AU - Panduro Vazquez, W.

AU - Chao, D. S.

AU - Cheng, C. H.

AU - Echenard, B.

AU - Flood, K. T.

AU - Hitlin, D. G.

AU - Kim, J.

AU - Li, Y.

AU - Miyashita, T. S.

AU - Ongmongkolkul, P.

AU - Porter, F. C.

AU - Röhrken, M.

AU - Huard, Z.

AU - Meadows, B. T.

AU - Pushpawela, B. G.

AU - Sokoloff, M. D.

AU - Sun, L.

AU - Smith, J. G.

AU - Soffer, A.

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Observation of the Decay D0 →k-π+e+e-

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