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- W4299367000 abstract "We explore the use of optimized operators, designed to interpolate only a single meson eigenstate, in three-point correlation functions with a vector-current insertion. These operators are constructed as linear combinations in a large basis of meson interpolating fields using a variational analysis of matrices of two-point correlation functions. After performing such a determination at both zero and non-zero momentum, we compute three-point functions and are able to study radiative transition matrix elements featuring excited state mesons. The required two- and three-point correlation functions are efficiently computed using the distillation framework in which there is a factorization between quark propagation and operator construction, allowing for a large number of meson operators of definite momentum to be considered. We illustrate the method with a calculation using anisotopic lattices having three flavors of dynamical quark all tuned to the physical strange quark mass, considering form-factors and transitions of pseudoscalar and vector meson excitations. The dependence on photon virtuality for a number of form-factors and transitions is extracted and some discussion of excited-state phenomenology is presented." @default.
- W4299367000 created "2022-10-02" @default.
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- W4299367000 date "2015-01-29" @default.
- W4299367000 modified "2023-10-04" @default.
- W4299367000 title "Excited meson radiative transitions from lattice QCD using variationally optimized operators" @default.
- W4299367000 doi "https://doi.org/10.48550/arxiv.1501.07457" @default.
- W4299367000 hasPublicationYear "2015" @default.
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