Browsing by Author "Edwards, Robert G"
Now showing items 1-5 of 5
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An a$_{0}$ resonance in strongly coupled πη, K$\bar K$ scattering from lattice QCD
(American Physical SocietyPhysical Review D, 2016-05-11)We present the first calculation of coupled-channel meson-meson scattering in the isospin =1, G-parity negative sector, with channels πη, K$\bar K$ and πη′, in a first-principles approach to QCD. From the discrete spectrum ...
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Coupled ππ, KK̅ scattering in P-wave and the ρ resonance from lattice QCD
(APSPhysical Review D, 2015-11-02)We determine elastic and coupled-channel amplitudes for isospin-1 meson-meson scattering in P-wave, by calculating correlation functions using lattice QCD with light quark masses such that m_π = 236 MeV in a cubic volume ...
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Resonances in coupled πK, ηK scattering from lattice QCD
(APSPhysical Review D, 2015-03-10)Coupled-channel πK and ηK scattering amplitudes are determined by studying the finite-volume energy spectra obtained from dynamical lattice QCD calculations. Using a large basis of interpolating operators, including both ...
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The resonant π+γ → π+π⁰ amplitude from Quantum Chromodynamics
(APSPhysical Review Letters, 2015-12-08)We present the first ab initio calculation of a radiative transition of a hadronic resonance within Quantum Chromodynamics (QCD). We compute the amplitude for ππ → πγ* , as a function of the energy of the ππ pair and the ...
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ππ→πγ$^{∗}$ amplitude and the resonant ρ→πγ$^{∗}$ transition from lattice QCD
(American Physical SocietyPhysical Review D, 2016-06-10)We present a determination of the P-wave ππ→πγ$^{⋆}$ transition amplitude from lattice quantum chromodynamics. Matrix elements of the vector current in a finite volume are extracted from three-point correlation functions, ...