First observation of the decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup><mml:mover accent="true"><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover><mml:mrow><mml:mmultiscripts><mml:mrow><mml:msup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>
R. AaijNikhef National Institute for Subatomic Physics, Amsterdam, NetherlandsC. Abellán BetetaPhysik-Institut, Universität Zürich, Zürich, SwitzerlandT. AckernleyOliver Lodge Laboratory, University of Liverpool, Liverpool, United KingdomB. AdevaInstituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, SpainM. AdinolfiH.H. Wills Physics Laboratory, University of Bristol, Bristol, United KingdomH. AfsharniaUniversité Clermont AuvergneC. A. AidalaUniversity of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA)S. AiolaINFN Sezione di Milano, Milano, ItalyZ. AjaltouniInstitut National de Physique Nucléaire et de Physique des ParticulesS. AkarUniversity of Cincinnati, Cincinnati, Ohio, USAJ. AlbrechtFakultät Physik, Technische Universität Dortmund, Dortmund, GermanyF. AlessioEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandM. AlexanderSchool of Physics and Astronomy, University of Glasgow, Glasgow, United KingdomA. Alfonso AlberoICCUB, Universitat de Barcelona, Barcelona, SpainZ. AlioucheDepartment of Physics and Astronomy, University of Manchester, Manchester, United KingdomG. AlkhazovPetersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, RussiaP. Álvarez CartelleEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandA. A. AlvesInstituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, SpainS. AmatoUniversidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, BrazilY. AmhisLaboratoire de Physique des 2 Infinis Irène Joliot-CurieL. AnINFN Sezione di Firenze, Firenze, ItalyL. AnderliniINFN Sezione di Firenze, Firenze, ItalyG. AndreassiInstitute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandA. AndreianovPetersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, RussiaM. AndreottiINFN Sezione di Ferrara, Ferrara, ItalyF. ArchilliPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyA. ArtamonovInstitute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia, Protvino, RussiaM. ArtusoSyracuse University, Syracuse, New York, USAK. ArzymatovYandex School of Data Analysis, Moscow, RussiaE. AslanidesAix Marseille Université, CNRS/IN2P3, CPPM, Marseille, FranceM. AtzeniPhysik-Institut, Universität Zürich, Zürich, SwitzerlandB. AudurierLaboratoire de Physique des 2 Infinis Irène Joliot-CurieS. BachmannPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyM. BachmayerInstitute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandJ. J. BackDepartment of Physics, University of Warwick, Coventry, United KingdomS. BakerImperial College London, London, United KingdomP. Baladrón RodríguezInstituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, SpainV. BalaguraUniversité Paris-SaclayW. BaldiniINFN Sezione di Ferrara, Ferrara, ItalyJ. Baptista de Souza LeiteCentro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, BrazilR. J. BarlowDepartment of Physics and Astronomy, University of Manchester, Manchester, United KingdomS. BarsukLaboratoire de Physique des 2 Infinis Irène Joliot-CurieW. BarterImperial College London, London, United KingdomM. BartoliniEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandF. BaryshnikovKurchatov InstituteJ. M. BaselsI. Physikalisches Institut, RWTH Aachen University, Aachen, GermanyG. BassiINFN Sezione di Pisa, Pisa, ItalyV. BatozskayaNational Center for Nuclear Research (NCBJ), Warsaw, PolandB. BatsukhSyracuse University, Syracuse, New York, USAA. BattigFakultät Physik, Technische Universität Dortmund, Dortmund, GermanyA. BayInstitute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandM. BeckerFakultät Physik, Technische Universität Dortmund, Dortmund, GermanyF. BedeschiINFN Sezione di Pisa, Pisa, ItalyI. BediagaCentro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, BrazilA. BeiterSyracuse University, Syracuse, New York, USAV. BelavinYandex School of Data Analysis, Moscow, RussiaA. BeiterINFN Sezione di Cagliari, Monserrato, ItalyV. BelléeInstitute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandK. BelousInstitute for High Energy PhysicsI. BelyaevInstitute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia, Moscow, RussiaG. BencivenniINFN Laboratori Nazionali di Frascati, Frascati, ItalyE. Ben-HaimLaboratoire de Physique Nucléaire et de Hautes ÉnergiesA. BerezhnoyInstitute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, RussiaR. BernetPhysik-Institut, Universität Zürich, Zürich, SwitzerlandD. BerninghoffPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyH. C. BernsteinSyracuse University, Syracuse, New York, USAC. BertellaEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandE. BertholetUniversité Paris CitéA. BertolinUniversita degli Studi di Padova, Universita e INFN, Padova, Padova, ItalyC. BetancourtPhysik-Institut, Universität Zürich, Zürich, SwitzerlandF. BettiINFN Sezione di Bologna, Bologna, ItalyM.-O. BettlerCavendish Laboratory, University of Cambridge, Cambridge, United KingdomIa. BezshyikoInstitute of Nuclear Physics, Polish Academy of SciencesS. BhasinH.H. Wills Physics Laboratory, University of Bristol, Bristol, United KingdomJ. BhomHenryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, PolandL. BianTsinghua UniversityM. S. BiekerFakultät Physik, Technische Universität Dortmund, Dortmund, GermanyS. BifaniUniversity of Birmingham, Birmingham, United KingdomP. BilloirLPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, FranceM. BirchImperial College London, London, United KingdomF. C. R. BishopCavendish Laboratory, University of Cambridge, Cambridge, United KingdomA. BizzetiINFN Sezione di Firenze, Firenze, ItalyM. BjørnDepartment of Physics, University of Oxford, Oxford, United KingdomM. P. BlagoEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandT. BlakeDepartment of Physics, University of Warwick, Coventry, United KingdomF. BlancInstitute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandS. BluskSyracuse University, Syracuse, New York, USAD. BobulskaSchool of Physics and Astronomy, University of Glasgow, Glasgow, United KingdomV. BocciINFN Sezione di Roma La Sapienza, Roma, ItalyJ. A. BoelhauveFakultät Physik, Technische Universität Dortmund, Dortmund, GermanyO. Boente GarcíaInstituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, SpainT. BoettcherMassachusetts Institute of Technology, Cambridge, Massachusetts, USAA. BoldyrevYandex School of Data AnalysisA. BondarBudker Institute of Nuclear Physics (SB RAS), Novosibirsk, RussiaN. BondarEuropean Organization for Nuclear ResearchS. BorghiDepartment of Physics and Astronomy, University of Manchester, Manchester, United KingdomM. BorisyakYandex School of Data Analysis, Moscow, RussiaM. BorsatoPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyJ. T. BorsukHenryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, PolandS. A. BouchibaInstitute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
2020lv
Ochiq kirishGibrid
Litsenziya: cc-by
ABI
Annotatsiya
The first observation of the decay ${B}^{0}\ensuremath{\rightarrow}{D}^{0}{\overline{D}}^{0}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ is reported using proton-proton collision data corresponding to an integrated luminosity of $4.7\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the LHCb experiment in 2011, 2012 and 2016. The measurement is performed in the full kinematically allowed range of the decay outside of the ${D}^{*\ensuremath{-}}$ region. The ratio of the branching fraction relative to that of the control channel ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{D}^{0}{K}^{+}$ is measured to be $\mathcal{R}=(14.2\ifmmode\pm\else\textpm\fi{}1.1\ifmmode\pm\else\textpm\fi{}1.0)%$, where the first uncertainty is statistical and the second is systematic. The absolute branching fraction of ${B}^{0}\ensuremath{\rightarrow}{D}^{0}{\overline{D}}^{0}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decays is thus determined to be $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}{D}^{0}{\overline{D}}^{0}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})=(3.50\ifmmode\pm\else\textpm\fi{}0.27\ifmmode\pm\else\textpm\fi{}0.26\ifmmode\pm\else\textpm\fi{}0.30)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, where the third uncertainty is due to the branching fraction of the control channel. This decay mode is expected to provide insights to spectroscopy and the charm-loop contributions in rare semileptonic decays.
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