Nucleon form factors: the space-time connection
نویسندگان
چکیده
منابع مشابه
Nucleon Form Factors in the Space- and Timelike Regions
Dispersion relations provide a powerful tool to describe the electromagnetic form factors of the nucleon both in the spacelike and timelike regions with constraints from unitarity and perturbative QCD. We give a brief introduction into dispersion theory for nucleon form factors and present results from a recent form factor analysis. Particular emphasis is given to the form factors in the timeli...
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I discuss how dispersion relations can be used to analyse the nucleon electromagnetic form factors, with particular emphasis on the constraints from unitarity and pQCD. Results for nucleon radii, vector-meson couplings, the onset of pQCD and bounds on the strangeness form factors are presented. The em form factors in the time–like region reveal some interesting physics which is not yet understo...
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The Nucleon electromagnetic form factors (em ff’s) represent a relevant chapter in our path towards the understanding of hadron dynamics. It is striking that, after almost half a century of experimental investigations, this field could still hold a number of surprises (e.g., the intriguing fall-off of the proton charge ff more rapid than the assumed dipole one), or have some kinematical regions...
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The nucleon elastic form factors are of fundamental interest, provide a unique testing ground for QCD motivated models of nucleon structure and are of critical importance to our understanding of the electromagnetic properties of nuclei. I review the recent experimental effort to measure the nucleon elastic form factors.
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Recent experimental data on space-like and time-like form factors of the nucleon are reviewed in light of a model of the nucleon with an intrinsic (quark-like) structure and a meson cloud. The analysis points to the astonishing result that the proton electric space-like form factor vanishes at Q ∼ 8 (GeV/c) and becomes negative beyond that point. The intrinsic structure is estimated to have a r...
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ژورنال
عنوان ژورنال: Chinese Physics C
سال: 2010
ISSN: 1674-1137
DOI: 10.1088/1674-1137/34/6/043