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Observation of Several Sources of $CP$ Violation in $B^+ \to \pi^+ \pi^+ \pi^-$ Decays

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  • معلومة اضافية
    • Contributors:
      National Institute for Subatomic Physics Amsterdam (NIKHEF); Institut de théorie des phénomènes physiques (EPFL); Ecole Polytechnique Fédérale de Lausanne (EPFL); IGFAE; Universidade de Santiago de Compostela Spain (USC ); H.H. Wills Physics Laboratory, University of Bristol; University of Michigan Ann Arbor; University of Michigan System; Laboratoire de Physique de Clermont (LPC); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA); University of Cincinnati (UC); Laboratori Nazionali di Frascati = National Laboratory of Frascati (LNF); Istituto Nazionale di Fisica Nucleare (INFN); Fakultät Physik, Technische Universität Dortmund; European Organization for Nuclear Research (CERN); School of Physics and Astronomy, Glasgow; University of Glasgow; Institut de Ciencies del Cosmos (ICCUB); Universitat de Barcelona (UB); Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI); Imperial College London; Universidade Federal do Rio de Janeiro Brasil = Federal University of Rio de Janeiro Brazil = Université fédérale de Rio de Janeiro Brésil (UFRJ); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3); Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (INFN, Sezione di Firenze); Università degli Studi di Ferrara = University of Ferrara (UniFE); University of Maryland College Park; University of Maryland System; Centre de Physique des Particules de Marseille (CPPM); Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI); Syracuse University; Yandex School of Data Analysis (YSDA); Institut für Theoretische Physik, Universität Zürich; INFN Sezione di Cagliari, Monserrato; Laboratoire Leprince-Ringuet (LLR); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS); Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS); Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Laboratoire d'Annecy de Physique des Particules (LAPP); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS); LHCb
    • بيانات النشر:
      HAL CCSD
      American Physical Society
    • الموضوع:
      2020
    • Collection:
      Aix-Marseille Université: HAL
    • نبذة مختصرة :
      International audience ; Observations are reported of different sources of CP violation from an amplitude analysis of B+→π+π+π- decays, based on a data sample corresponding to an integrated luminosity of 3 fb-1 of pp collisions recorded with the LHCb detector. A large CP asymmetry is observed in the decay amplitude involving the tensor f2(1270) resonance, and in addition significant CP violation is found in the π+π-S wave at low invariant mass. The presence of CP violation related to interference between the π+π-S wave and the P wave B+→ρ(770)0π+ amplitude is also established; this causes large local asymmetries but cancels when integrated over the phase space of the decay. The results provide both qualitative and quantitative new insights into CP -violation effects in hadronic B decays.
    • Relation:
      info:eu-repo/semantics/altIdentifier/arxiv/1909.05211; hal-02317331; https://hal.science/hal-02317331; https://hal.science/hal-02317331/document; https://hal.science/hal-02317331/file/PhysRevLett.124.031801.pdf; ARXIV: 1909.05211; INSPIRE: 1753653
    • الرقم المعرف:
      10.1103/PhysRevLett.124.031801
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.972D65D