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-meson to light-meson transition form factors
Phys. Rev. D 76, 034018 – Published 30 August, 2007
DOI: https://doi.org/10.1103/PhysRevD.76.034018
Abstract
We report a comprehensive set of results for -meson heavy-to-light transition form factors calculated using a truncation of, and expression for, the transition amplitudes in which all elements are motivated by the study of Dyson-Schwinger equations in QCD. In this relativistic approach, which realizes confinement and dynamical chiral symmetry breaking, all physical values of momentum transfer in the transition form factors are simultaneously accessible. Our results can be useful in the analysis and correlation of the large body of data being accumulated at extant facilities, and thereby in probing the standard model and beyond.
Article Text
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NB. In our concrete calculations we use a Euclidean metric, with: ; ; ; and , . For a spacelike vector , .
NB. With the models we employ for the mesons’ Bethe-Salpeter amplitudes, these integrals are absolutely convergent. On the other hand, in QCD a renormalization constant is required to guarantee that these expressions are well defined [29, 30].
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