Tests of Lepton Universality Using <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msubsup><mml:mi>K</mml:mi><mml:mi>S</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>−</mml:mo></mml:msup></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>B</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo>*</mml:mo><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mo>ℓ</mml:mo><mml:mo>−</mml:mo></mml:msup></mml:math> Decays
R. AaijNikhef National Institute for Subatomic Physics, Amsterdam, NetherlandsAhmed Sameh Wagih AbdelmottelebDepartment of Physics, University of Warwick, Coventry, United KingdomCarlos Abellán BetetaPhysik-Institut, Universität Zürich, Zürich, SwitzerlandC. Abellán BetetaDepartment of Physics, University of Warwick, Coventry, United KingdomT. 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 Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, FranceC. AgapopoulouLaboratoire de Physique Nucléaire et de Hautes ÉnergiesC. A. AidalaUniversity of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA)S. AiolaINFN Sezione di Milano, Milano, ItalyZ. AjaltouniUniversité Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, FranceS. 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, SpainZakariya AlioucheDepartment of Physics and Astronomy, University of Manchester, Manchester, United KingdomG. AlkhazovPetersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, RussiaP. Álvarez CartelleCavendish Laboratory, University of Cambridge, Cambridge, United KingdomS. AmatoUniversidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, BrazilS. AmatoH.H. Wills Physics Laboratory, University of Bristol, Bristol, United KingdomY. AmhisUniversité Paris-SaclayL. AnEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandL. AnderliniINFN Sezione di Firenze, Firenze, ItalyNils AnderssonPhysik-Institut, Universität Zürich, Zürich, 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. V. 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 Univ, CNRS/IN2P3, CPPM, Marseille, FranceM. AtzeniPhysik-Institut, Universität Zürich, Zürich, SwitzerlandB. AudurierÉcole PolytechniqueS. 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 KingdomP. Baladrón RodríguezInstituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, SpainV. BalaguraLaboratoire Leprince-RinguetW. BaldiniINFN Sezione di Ferrara, Ferrara, ItalyJ. Baptista LeiteCentro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, BrazilM. BarbettiINFN Sezione di Firenze, Firenze, ItalyR. 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. BartoliniCavendish Laboratory, University of Cambridge, Cambridge, United KingdomF. BaryshnikovKurchatov InstituteJ. M. BaselsI. Physikalisches Institut, RWTH Aachen University, Aachen, GermanyB. BatsukhAGH-University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, PolandG. BassiINFN Sezione di Pisa, Pisa, ItalyB. BatsukhSyracuse University, Syracuse, New York, USAA. BattigFakultät Physik, Technische Universität Dortmund, Dortmund, GermanyA. BayInstitute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, SwitzerlandA. BeckDepartment of Physics, University of Warwick, Coventry, United KingdomM. 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, RussiaS. BelinINFN Sezione di Cagliari, Monserrato, ItalyV. BelléePhysik-Institut, Universität Zürich, Zürich, SwitzerlandK. BelousInstitute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia, Protvino, RussiaI. BelovInstitute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, RussiaI. BelyaevInstitute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, RussiaG. BencivenniINFN Laboratori Nazionali di Frascati, Frascati, ItalyE. Ben-HaimSorbonne Paris CitéA. BerezhnoyInstitute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, RussiaRoland BernetPhysik-Institut, Universität Zürich, Zürich, SwitzerlandD. BerninghoffPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, GermanyH. C. BernsteinSyracuse University, Syracuse, New York, USAC. BertellaDepartment of Physics and Astronomy, University of Manchester, Manchester, United KingdomA. BertolinUniversita degli Studi di Padova, Universita e INFN, Padova, Padova, ItalyC. BetancourtPhysik-Institut, Universität Zürich, Zürich, SwitzerlandF. BettiEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandIa. BezshyikoPhysik-Institut, Universität Zürich, Zürich, SwitzerlandS. 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, GermanyN. V. BiesuzINFN Sezione di Ferrara, Ferrara, ItalyS. BifaniUniversity of Birmingham, Birmingham, United KingdomP. BilloirSorbonne Paris CitéA. BiolchiniNikhef National Institute for Subatomic Physics, Amsterdam, NetherlandsM. BirchImperial College London, London, United KingdomF. C. R. BishopCavendish Laboratory, University of Cambridge, Cambridge, United KingdomA. BitadzeDepartment of Physics and Astronomy, University of Manchester, Manchester, 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, SwitzerlandF. BlancDepartment of Physics, University of Warwick, Coventry, United KingdomS. BluskSyracuse University, Syracuse, New York, USAD. BobulskaSchool of Physics and Astronomy, University of Glasgow, Glasgow, United KingdomJ. 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. BoettcherUniversity of Cincinnati, Cincinnati, Ohio, USAA. BoldyrevNational Research University Higher School of Economics, Moscow, Russia (associated with Yandex School of Data Analysis, Moscow, Russia)A. BondarBudker Institute of Nuclear PhysicsN. BondarEuropean Organization for Nuclear Research (CERN), Geneva, Switzerland
2022lv
ABI
Annotatsiya
Tests of lepton universality in B^{0}→K_{S}^{0}ℓ^{+}ℓ^{-} and B^{+}→K^{*+}ℓ^{+}ℓ^{-} decays where ℓ is either an electron or a muon are presented. The differential branching fractions of B^{0}→K_{S}^{0}e^{+}e^{-} and B^{+}→K^{*+}e^{+}e^{-} decays are measured in intervals of the dilepton invariant mass squared. The measurements are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb^{-1} . The results are consistent with the standard model and previous tests of lepton universality in related decay modes. The first observation of B^{0}→K_{S}^{0}e^{+}e^{-} and B^{+}→K^{*+}e^{+}e^{-} decays is reported.
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