Baryon form factors: Model-independent results
نویسندگان
چکیده
منابع مشابه
Baryon form factors : Model – independent results ∗
Baryon form factors can be analyzed in a largely model–independent fashion in terms of two complementary approaches. These are chiral perturbation theory and dispersion relations. I review the status of dispersive calculations of the nucleon electromagnetic form factors in the light of new data. Then, I present the leading one–loop chiral perturbation theory analysis of the hyperon and the stra...
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Poincaré covariant quark models of the the nucleon, the ∆ resonance and their excitations are explored. The baryon states are represented by eigenfunctions of the four-velocity and a confining mass operator, which reproduces the empirical spectrum up to ∼ 1700 MeV to an accuracy of ∼ 6%. Models of constituent quark currents provide the relations between ground-state properties and transition am...
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The form factors of baryons have long been studied in electron scattering, and now we are here to discuss new opportunities that can come from an e+e− collider at moderate energies where exclusive cross sections may be measured. One can foresee measurements of the form factors of baryons in the timelike region. The richness of these measurements should be clear. We can in principle measure the ...
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We demonstrate that the B → D(∗)lν form factors can be accurately predicted given the slope parameter ρ2 of the Isgur-Wise function. Only weak assumptions, consistent with lattice results, on the wavefunction for the light degrees of freedom are required to establish this result. We observe that the QCD and 1 mQ corrections can be systematically represented by an effective Isgur-Wise function o...
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In the holographic model of QCD suggested by Sakai and Sugimoto, baryons are chiral solitons sourced by D4 instantons in bulk of size 1/ √ λ with λ = gNc. We quantize the D4 instanton semiclassically using ~ = 1/(Ncλ) and non-rigid constraints on the vector mesons. The holographic baryon is a small chiral bag in the holographic direction with a Cheshire cat smile. The vector-baryon interactions...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2000
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(00)00010-5