Updated dispersion-theoretical analysis of the nucleon electromagnetic form factors

In the light of the new data on the various neutron and proton electromagnetic form factors taken in recent years, we update the dispersion-theoretical analysis of the nucleon electromagnetic form factors from the mid-nineties. The parametrization of the spectral functions includes constraints from unitarity, perturbative QCD, and recent measurements of the neutron charge radius. We obtain a good description of most modern form factor data, with the exception of the Jefferson Lab data on G_E^p/G_M^p in the four-momentum transfer range Q^2=3...6 GeV^2. For the magnetic radii of the proton and the neutron we find r_M^p = 0.857 fm and r_M^n = 0.879 fm, which is consistent with the recent determinations using continued fraction expansions.Comment: 5 pages, 3 ps figures, final version, exp. errors in Figs. 1 and 3 correcte

Jia Zhangke and "Sanxia Haoren"

400204251462014年12月28日付け「朝日新聞」朝刊に「北京へ1400キロ　水届いた」「発案60年　不足解消狙う」という見出しが躍り、長江流域の水を中国北部に運ぶ「南水北調」という長年のプロジェクトが27日に完成したことが報道された。朝日新聞は、国営新華社通信報道をつぎのように紹介している。以下に少し拾ってみる。departmental bulletin pape

Electromagnetic form factors of the baryon octet in the perturbative chiral quark model

We apply the perturbative chiral quark model at one loop to analyze the electromagnetic form factors of the baryon octet. The analytic expressions for baryon form factors, which are given in terms of fundamental parameters of low-energy pion-nucleon physics (weak pion decay constant, axial nucleon coupling, strong pion-nucleon form factor), and the numerical results for baryon magnetic moments, charge and magnetic radii are presented. Our results are in good agreement with experimental data.Comment: 15 pages, 6 figures, to be published in Eur. Phys. J.

Anicii Manlii Severini Boetii ... de consolatione philosophiae [Manuscrito] ; Liber quomodo Trinitas unus Deus ac non tres Dii

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Arithmetica, duobus discreta libris

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Claims of Munsee Indians

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Opera. Euclides: Elementa geometriae Lib. I-IV

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