Strong and Weak CP Tests in Sequential Decays of Polarized Σ^{0} Hyperons.

The J/ψ, ψ(3686)→Σ^{0}Σ[over ¯]^{0} processes and subsequent decays are studied using the world's largest J/ψ and ψ(3686) data samples collected with the BESIII detector. The parity-violating decay parameters of the decays Σ^{0}→Λγ and Σ[over ¯]^{0}→Λ[over ¯]γ, α_{Σ^{0}}=-0.0017±0.0021±0.0018 and α[over ¯]_{Σ^{0}}=0.0021±0.0020±0.0022, are measured for the first time. The strong CP symmetry is tested in the decays of the Σ^{0} hyperons for the first time by measuring the asymmetry A_{CP}^{Σ}=α_{Σ^{0}}+α[over ¯]_{Σ^{0}}=(0.4±2.9±1.3)×10^{-3}. The weak CP test is performed in the subsequent decays of their daughter particles Λ and Λ[over ¯]. Also for the first time, the transverse polarizations of the Σ^{0} hyperons in J/ψ and ψ(3686) decays are observed with opposite directions, and the ratios between the S-wave and D-wave contributions of the J/ψ, ψ(3686)→Σ^{0}Σ[over ¯]^{0} decays are obtained. These results are crucial to understand the decay dynamics of the charmonium states and the production mechanism of the Σ^{0}-Σ[over ¯]^{0} pairs.

• Publication year

  2024

• Venue

  Physical Review Letters

• Publication date

  2024-06-10

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevLett.133.101902arXiv 2406.06118PMID 39303247
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

• Determination of the number of ψ(3686) events taken at BESIII

  2024cited by this paper
• Measurement of CP Violation in B^{0}→ψ(→ℓ^{+}ℓ^{-})K_{S}^{0}(→π^{+}π^{-}) Decays.

  2023cited by this paper
• Method for detector description transformation to Unity and application in BESIII

  2022cited by this paper
• Precise Measurements of Decay Parameters and CP Asymmetry with Entangled Λ-Λ[over ¯] Pairs.

  2022cited by this paper
• Probing CP symmetry and weak phases with entangled double-strange baryons

  2022cited by this paper
• Model-Independent Determination of the Spin of the Ω^{-} and Its Polarization Alignment in ψ(3686)→Ω^{-}Ω[over ¯]^{+}.

  2021cited by this paper
• Number of J/ψ events at BESIII

  2021cited by this paper
• LHCb Collaboration

  2021cited by this paper
• Measurement of the Permanent Electric Dipole Moment of the Neutron.

  2020cited by this paper
• Σ^{+} and Σ[over ¯]^{-} Polarization in the J/ψ and ψ(3686) Decays.

  2020cited by this paper
• Design and construction of the new BESIII endcap Time-of-Flight system with MRPC Technology

  2020cited by this paper
• Observation of CP Violation in Charm Decays.

  2019cited by this paper
• Future Physics Programme of BESIII

  2019cited by this paper
• Erratum to: Prospects for rare and forbidden hyperon decays at BESIII

  2019cited by this paper
• Polarization and entanglement in baryon–antibaryon pair production in electron–positron annihilation

  2018cited by this paper
• Constraining P and CP violation in the main decay of the neutral Sigma hyperon

  2018cited by this paper
• The study of time calibration for upgraded end cap TOF of BESIII

  2017cited by this paper
• Hadronic structure functions in the $e^+ e^- \rightarrow \bar{\Lambda} \Lambda$ reaction

  2017cited by this paper
• Study of MRPC technology for BESIII endcap-TOF upgrade

  2017cited by this paper
• Prospects for rare and forbidden hyperon decays at BESIII

  2016cited by this paper
• DETECTORS AND EXPERIMENTAL METHODS: Decay vertex reconstruction and 3-dimensional lifetime determination at BESIII

  2009cited by this paper
• Design and Construction of the BESIII Detector

  2009cited by this paper
• Event generators at BESIII

  2008cited by this paper
• General analysis of polarization phenomena in e++e−→N+N¯ for axial parametrization of two-photon exchange

  2005cited by this paper
• The Search for a Permanent Electric Dipole Moment

  2003cited by this paper
• Belle Collaboration

  2001cited by this paper
• Observation of large CP violation in the neutral B meson system.

  2001cited by this paper
• The Babar Collaboration

  2000cited by this paper
• Review of Particle Physics

  1996cited by this paper
• Electric-Dipole Moments of Particles

  1982cited by this paper
• Measurement of the differential cross section and the spin-correlation parameters P, A and R in the backward peak of π−p→K0Λ at 5 GeV/c

  1975cited by this paper
• Weak Interactions of Leptons and Quarks

  1973cited by this paper
• A measurement of the β-parameter in the charged nonleptonic decay of the Λ0 hyperon

  1972cited by this paper
• THE EIGHTFOLD WAY: A THEORY OF STRONG INTERACTION SYMMETRY

  1961cited by this paper
• Proof of the TCP theorem

  1957cited by this paper

• A Review of Hyperon Physics at BESIII Experiment

  2026cites this paper
• B → K+ invisible, dark matter, and CP violation in hyperon decays

  2025cites this paper
• Precision CP Symmetry Test and Polarization Analysis in Σ^{+} Decays.

  2025cites this paper
• Observation of ψ(3686) →Ξ−KS0Ω¯+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\Xi}^{-}{K}_S^0{\overline{\varOmega}

  2025cites this paper
• Polarization analysis in $e^+e^-\rightarrow J/\psi\rightarrow$ baryon-antibaryon pairs

  2025cites this paper
• Particle Collisions&Quantum Entanglement in High-Energy Collisions

  2025cites this paper
• CP violation in the hyperon decays Σ → Nπ

  2025cites this paper
• The Production and Decay Dynamics of the Charmed Baryon $\Lambda_c^+$ in $e^+e^-$ Annihilations near Threshold

  2025cites this paper
• Bell inequality is violated in charmonium decays

  2024cites this paper
• Su(3) symmetry analysis in charmed baryon two body decays with penguin diagram contribution

  2024cites this paper