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• W4313305640 abstract "We present the first calculation in lattice QCD of the process $gamma K to Kpi$ in which the narrow $K^*$ vector resonance appears. Using a lattice on which the pion has a mass of 284 MeV, we determine the transition amplitude at 128 points in the $(Q^2, E_{Kpi})$ plane, and find suitable resonant scattering descriptions. We demonstrate the need to account for $S$--wave $Kpi$ elastic scattering when converting the finite-volume matrix elements computed in lattice QCD to the physically relevant infinite-volume matrix elements, even when we are primarily interested in the $P$--wave amplitude. Analytically continuing parameterizations of the $gamma K to Kpi$ amplitude to the $K^*$ resonance pole, we obtain the $K^{*+} to K^+ gamma$ transition form-factor, and compare the $Q^2=0$ value to the corresponding value extracted from the experimental partial-decay width." @default.
• W4313305640 created "2023-01-06" @default.
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• W4313305640 date "2022-12-28" @default.
• W4313305640 modified "2023-10-17" @default.
• W4313305640 title "Radiative decay of the resonant <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msup><mml:mi>K</mml:mi><mml:mo>*</mml:mo></mml:msup></mml:math> and the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>γ</mml:mi><mml:mi>K</mml:mi><mml:mo stretchy=false>→</mml:mo><mml:mi>K</mml:mi><mml:mi>π</mml:mi></mml:math> amplitude from lattice QCD" @default.
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• W4313305640 doi "https://doi.org/10.1103/physrevd.106.114513" @default.
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