Electromagnetic Form Factors of Meson Transitions
نویسنده
چکیده
The Dyson-Schwinger equation (DSE) approach [1] to non-perturbative QCD modeling of hadrons and their interactions [2] combines truncated QCD equations of motion for propagators and vertices with infrared phenomenology fitted to a few key low-energy observables. Parameter-free predictions for other hadron properties and observables are then used to develop and test our understanding of hadron physics at the quark-gluon level. The DSE for the fully-dressed and renormalized quark propagator in Euclidean metric is
منابع مشابه
light-front constituent quark model
The form factors of the πρ and πω radiative transitions are evaluated within a lightfront constituent quark model, using for the first time the eigenfunctions of a light-front mass operator reproducing the meson mass spectrum and including phenomenological Dirac and Pauli quark form factors in the one-body electromagnetic current operator. The sensitivity of the transition form factors both to ...
متن کاملForm factor relations for pseudoscalar to vector meson transitions
In semi-leptonic and other weak decays of mesons, the hadronic matrix elements of the operators in the weak Hamiltonian are parametrized by standard sets of independent, Lorentz invariant, form factors. For the case of pseudoscalar to vector meson transitions, it has been shown that a Quark Model description leads to relations between some of the form factors. Here, I give an alternate, and mor...
متن کاملThe Modern Description of Semileptonic Meson Form Factors
Semileptonic transitions of one meson into another yield important measurements of both weak and strong dynamics. By comparing the experimentally determined decay rate to a theoretical normalization of the relevant hadron transition amplitude at one or more kinematic points, elements of the CabibboKobayashi-Maskawa (CKM) matrix are determined. Independent of the overall normalization, the shape...
متن کاملElectromagnetic form factors of the ρ meson in light cone QCD sum rules
We investigate the electromagnetic form factors of the ρ meson in light cone QCD sum rules. We find that the ratio of the magnetic and charge form factors is larger than two at all values of Q2, (Q2 ≥ 0.5 GeV 2). The values of the individual form factors at fixed values of Q2 predicted by the light cone QCD sum rules are quite different compared to the results of other approaches. These results...
متن کاملInelastic diffraction and meson radii
It is shown that meson radii can be extracted from diffractive scattering experiments of the type: m + p → m + X, where p stands for the target proton, and m for the incident charged meson π, π, K, or K. The basis of the method used to perform this extraction is the QCD-based SOC-picture for inelastic diffraction in high-energy hadron-hadron and lepton-hadron collisions proposed in a recent Let...
متن کامل