Observation of the Resonant Character of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>4430</mml:mn><mml:msup><mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>State
R. AaijNikhef National Institute for Subatomic Physics, Amsterdam, The NetherlandsB. AdevaUniversidad de Santiago de Compostela, Santiago de Compostela, SpainM. AdinolfiH.H. Wills Physics Laboratory, University of Bristol, Bristol, United KingdomTony AffolderOliver Lodge Laboratory, University of Liverpool, Liverpool, United KingdomZ. AjaltouniUniversité Clermont AuvergneJ. 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 KingdomS. AliNikhef National Institute for Subatomic Physics, Amsterdam, The NetherlandsG. AlkhazovPetersburg Nuclear Physics Institute (PNPI), Gatchina, RussiaP. Álvarez CartelleUniversidad de Santiago de Compostela, Santiago de Compostela, SpainA. A. AlvesEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandS. AmatoUniversidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, BrazilS. AmerioSezione INFN di Padova, Padova, ItalyY. AmhisCentre National de la Recherche ScientifiqueL. AnCenter for High Energy Physics, Tsinghua University, Beijing, ChinaL. AnSezione INFN di Firenze, Firenze, ItalyJ. AndersonPhysik-Institut, Universität Zürich, Zürich, SwitzerlandR. AndreassenUniversity of Cincinnati, Cincinnati, Ohio, USAM. AndreottiSezione INFN di Ferrara, Ferrara, ItalyJ. E. AndrewsUniversity of Maryland, College Park, Maryland, USAR. B. ApplebySchool of Physics and Astronomy, University of Manchester, Manchester, United KingdomO. Aquines GutierrezMax-Planck-Institut für Kernphysik (MPIK), Heidelberg, GermanyF. ArchilliEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandA. ArtamonovInstitute for High Energy Physics (IHEP), Protvino, RussiaM. ArtusoSyracuse University, Syracuse, New York, USAE. AslanidesCPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, FranceG. AuriemmaSezione INFN di Roma La Sapienza, Roma, ItalyM. BaalouchClermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, FranceS. BachmannPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyJ. J. BackDepartment of Physics, University of Warwick, Coventry, United KingdomA. BadalovUniversitat de Barcelona, Barcelona, SpainV. BalaguraInstitute of Theoretical and Experimental Physics (ITEP), Moscow, RussiaW. BaldiniSezione INFN di Ferrara, Ferrara, ItalyR. J. BarlowSchool of Physics and Astronomy, University of Manchester, Manchester, United KingdomC. BarschelEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandS. BarsukCentre National de la Recherche ScientifiqueW. BarterCavendish Laboratory, University of Cambridge, Cambridge, United KingdomV. BatozskayaNational Center for Nuclear Research (NCBJ), Warsaw, PolandTh. BauerNikhef National Institute for Subatomic Physics, Amsterdam, The NetherlandsA. BayEcole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandL. BeaucourtInstitut National de Physique Nucléaire et de Physique des ParticulesJ. BeddowSchool of Physics and Astronomy, University of Glasgow, Glasgow, United KingdomF. BedeschiSezione INFN di Pisa, Pisa, ItalyI. BediagaCentro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, BrazilS. BelogurovInstitute of Theoretical and Experimental Physics (ITEP), Moscow, RussiaK. BelousInstitute for High Energy Physics (IHEP), Protvino, RussiaI. BelyaevInstitute of Theoretical and Experimental Physics (ITEP), Moscow, RussiaE. Ben-HaimUniversité Paris CitéG. BencivenniLaboratori Nazionali dell'INFN di Frascati, Frascati, ItalyS. BensonEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandJ. BentonH.H. Wills Physics Laboratory, University of Bristol, Bristol, United KingdomA. BerezhnoyInstitute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, RussiaR. BernetPhysik-Institut, Universität Zürich, Zürich, SwitzerlandM.-O. BettlerCavendish Laboratory, University of Cambridge, Cambridge, United KingdomM. van BeuzekomNikhef National Institute for Subatomic Physics, Amsterdam, The NetherlandsA. BieńPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyS. BifaniUniversity of Birmingham, Birmingham, United KingdomT. BirdSchool of Physics and Astronomy, University of Manchester, Manchester, United KingdomA. BizzetiSezione INFN di Firenze, Firenze, ItalyP. M. BjørnstadSchool of Physics and Astronomy, University of Manchester, Manchester, United KingdomT. BlakeDepartment of Physics, University of Warwick, Coventry, United KingdomF. BlancEcole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandJ. BlouwMax-Planck-Institut für Kernphysik (MPIK), Heidelberg, GermanyS. BluskSyracuse University, Syracuse, New York, USAV. BocciSezione INFN di Roma La Sapienza, Roma, ItalyA. BondarBudker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, RussiaN. BondarEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandW. BoniventoEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandS. BorghiSchool of Physics and Astronomy, University of Manchester, Manchester, United KingdomA. BorgiaSyracuse University, Syracuse, New York, USAM. BorsatoLAL, Université Paris-Sud, CNRS/IN2P3, Orsay, FranceT. J. V. BowcockOliver Lodge Laboratory, University of Liverpool, Liverpool, United KingdomE. BowenPhysik-Institut, Universität Zürich, Zürich, SwitzerlandC. BozziSezione INFN di Ferrara, Ferrara, ItalyT. BrambachFakultät Physik, Technische Universität Dortmund, Dortmund, GermanyJ. F. J. van den BrandNikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The NetherlandsJ. BressieuxEcole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandD. BrettSchool of Physics and Astronomy, University of Manchester, Manchester, United KingdomM. BritschMax-Planck-Institut für Kernphysik (MPIK), Heidelberg, GermanyT. BrittonSyracuse University, Syracuse, New York, USAJ. BrodzickaSchool of Physics and Astronomy, University of Manchester, Manchester, United KingdomN. H. BrookH.H. Wills Physics Laboratory, University of Bristol, Bristol, United KingdomH. BrownOliver Lodge Laboratory, University of Liverpool, Liverpool, United KingdomA. BurschePhysik-Institut, Universität Zürich, Zürich, SwitzerlandG. BusettoSezione INFN di Padova, Padova, ItalyJ. BuytaertEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandS. CadedduSezione INFN di Cagliari, Cagliari, ItalyR. CalabreseSezione INFN di Ferrara, Ferrara, ItalyM. CalviSezione INFN di Milano Bicocca, Milano, ItalyM. Calvo GomezUniversitat de Barcelona, Barcelona, SpainA. CamboniUniversitat de Barcelona, Barcelona, SpainP. CampanaEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandD. H. Cámpora PérezEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandA. CarboneSezione INFN di Bologna, Bologna, ItalyG. CarboniSezione INFN di Roma Tor Vergata, Roma, ItalyR. CardinaleSezione INFN di Genova, Genova, ItalyA. CardiniSezione INFN di Cagliari, Cagliari, ItalyH. Carranza-MejiaSchool of Physics and Astronomy, University of Edinburgh, Edinburgh, United KingdomL. CarsonSchool of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
2014lv
ABI
Annotatsiya
Resonant structures in B^{0}→ψ^{'}π^{-}K^{+} decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3 fb^{-1} collected with the LHCb detector. The data cannot be described with K^{+}π^{-} resonances alone, which is confirmed with a model-independent approach. A highly significant Z(4430)^{-}→ψ^{'}π^{-} component is required, thus confirming the existence of this state. The observed evolution of the Z(4430)^{-} amplitude with the ψ^{'}π^{-} mass establishes the resonant nature of this particle. The mass and width measurements are substantially improved. The spin parity is determined unambiguously to be 1^{+}.
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