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Award ID contains: 2310036

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  1. ; ; ; (, Journal of High Energy Physics)
    A<sc>bstract</sc> In certain kinematic and particle mass configurations, triangle singularities may lead to line-shapes which mimic the effects of resonances. This well-known effect is scrutinized here in the presence of final-state rescattering. The goal is achieved first by utilizing general arguments provided by Landau equations, and second by applying a modern scattering formalism with explicit two- and three-body unitarity. 
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  2. ; ; ; ; ; ; (, Physical Review D)
  3. ; ; ; ; ; ; (, Physical Review Letters)
    Many excited states in the hadron spectrum have large branching ratios to three-hadron final states. Understanding such particles from first principles QCD requires input from lattice QCD with one-, two-, and three-meson interpolators as well as a reliable three-body formalism relating finite-volume spectra at unphysical pion mass values to the scattering amplitudes at the physical point. In this work, we provide the first-ever calculation of the resonance parameters of the ω meson from lattice QCD, including an update of the formalism through matching to effective field theories. The main result of this pioneering study, the pole position of the ω meson at s ω = ( 778.0 ( 11.2 ) − i 3.0 ( 5 ) )     MeV , agrees reasonably well with experiment. In addition we provide an estimate of the ω − ρ mass difference as 29(15) MeV. Published by the American Physical Society2024 
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    Free, publicly-accessible full text available November 1, 2025
  4. ; ; ; ; ; ; ; (, Physical Review Letters)
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