Nucleon structure from the quasithreshold inverse pion electroproduction

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dc.creatorBlokhintseva, T. D.
dc.creatorNagy, M.
dc.creatorSurovtsev, Yu. S.
dc.date1998-12-03
dc.date.accessioned2026-07-07T04:05:55Z
dc.date.available2026-07-07T04:05:55Z
dc.descriptionThe process $πN\to e^+e^- N$ (IPE), being a natural and unique laboratory for studying the hadron electromagnetic structure in the sub-$N\bar{N}$-threshold time-like region of the virtual-photon ``mass'' $λ^2$, turns out to be also very useful for investigating the nucleon weak structure. A theoretical basis of the methods for extracting practically model-independent values of the electromagnetic hadron form factors in the time-like region and for determining the weak structure of the nucleon in the space-like region from experimental data on IPE at low energies is outlined. The results of extracting, by those methods, the electromagnetic $F_1^v(λ^2)$ and pseudoscalar $G_P(t)$ form-factors of a nucleon are presented, where an indication of the existence of the state $π^\p$ in the range 500-800 MeV (possibly the first radial excitation of pion) is obtained, and the coupling constant of this new state with the nucleon is estimated.
dc.description15 pages, LaTex; An extended version of the talk given at the International Conference HADRON STRUCTURE'98 (Stara Lesna, High Tatra Mountains, Slovak Republic; September 7-13, 1998)
dc.identifierhttps://arxiv.org/abs/hep-ph/9812241
dc.identifierhttp://arxiv.org/abs/hep-ph/9812241
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/48582
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNucleon structure from the quasithreshold inverse pion electroproduction
dc.typetext

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