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Showing 1–8 of 8 results
Advanced filters: Author: M. Scodeggio Clear advanced filters

  • While Bell inequalities have been violated several times—mostly in photonic systems—their violations within particle physics experiments are less explored. Here, the BESIII Collaboration showcases Bell-violating nonlocal correlations between entangled hyperon pairs.

    • M. Ablikim
    • M. N. Achasov
    • J. Zu
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-9

  • A measurement of the radial anisotropy at a redshift z ≅ 0.8 that is consistent with the standard cosmological-constant model with low matter density and flat geometry is reported, although error bars are still too large to distinguish among alternative origins for the accelerated expansion.

    • L. Guzzo
    • M. Pierleoni
    • E. Zucca
    Research
    Nature
    Volume: 451, P: 541-544

  • The semileptonic decay channels of the Λc baryon can give important insights into weak interaction, but decay into a neutron, positron and electron neutrino has not been reported so far, due to difficulties in the final products’ identification. Here, the BESIII Collaboration reports its observation in e+e- collision data, exploiting machine-learning-based identification techniques.

    • M. Ablikim
    • M. N. Achasov
    • J. Zu
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-12

  • Investigating the inner structure of baryons is important to further our understanding of the strong interaction. Here, the BESIII Collaboration extracts the absolute value of the ratio of the electric to magnetic form factors and its relative phase for e + e − → J/ψ → ΛΣ decays, enhancing the signal thanks to the vacuum polarisation effect at the J/ψ peak.

    • M. Ablikim
    • M. N. Achasov
    • J. Zu
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-9

  • The ATLAS Collaboration reports the observation of the electroweak production of two jets and a Z-boson pair. This process is related to vector-boson scattering and allows the nature of electroweak symmetry breaking to be probed.

    • G. Aad
    • B. Abbott
    • L. Zwalinski
    ResearchOpen Access
    Nature Physics
    Volume: 19, P: 237-253

  • Using spin-entangled baryon–antibaryon pairs, the BESIII Collaboration reports on high-precision measurements of potential charge conjugation and parity (CP)-symmetry-violating effects in hadrons.

    • M. Ablikim
    • M. N. Achasov
    • J. H. Zou
    ResearchOpen Access
    Nature
    Volume: 606, P: 64-69

  • Form factors encode the structure of nucleons. Measurements from electron–positron annihilation at BESIII reveal an oscillating behaviour of the neutron electromagnetic form factor, and clarify a long-standing photon–nucleon interaction puzzle.

    • M. Ablikim
    • M. N. Achasov
    • J. H. Zou
    Research
    Nature Physics
    Volume: 17, P: 1200-1204