dorsal/arxiv
View SchemaPhotoproduction of Etas and N$^*$(1535) Electrostrong Properties
| Authors | Nimai C. Mukhopadhyay, J. -F. Zhang, M. Benmerrouche |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9511001 |
| URL | https://arxiv.org/abs/nucl-th/9511001 |
Abstract
From the new Mainz data of eta photoproduction off protons\cite{ref1} and deuterons\cite{ref2}, we can extract, via the effective Lagrangian approach (ELA)\cite{ref3}, the electrostrong parameters $\xi_{p}$ and $\xi_{n}$ for the N$^*$(1535) excitation. These parameters are, in units of $10^{-4} MeV^{-1}$, $(2.20\pm 0.15)$ and $(-1.86\pm 0.20)$ respectively. They yield the ratio of the helicity amplitudes for the excitation of N$^*$(1535) by photons off neutrons and protons to be $A^{n}_{1/2}/A^{p}_{1/2}=-0.84\pm 0.15$, a quantity of fundamental importance in the baryon structure. Best estimates in the quark model are close to this ratio.
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"abstract": "From the new Mainz data of eta photoproduction off protons\\cite{ref1} and\ndeuterons\\cite{ref2}, we can extract, via the effective Lagrangian approach\n(ELA)\\cite{ref3}, the electrostrong parameters $\\xi_{p}$ and $\\xi_{n}$ for the\nN$^*$(1535) excitation. These parameters are, in units of $10^{-4} MeV^{-1}$,\n$(2.20\\pm 0.15)$ and $(-1.86\\pm 0.20)$ respectively. They yield the ratio of\nthe helicity amplitudes for the excitation of N$^*$(1535) by photons off\nneutrons and protons to be $A^{n}_{1/2}/A^{p}_{1/2}=-0.84\\pm 0.15$, a quantity\nof fundamental importance in the baryon structure. Best estimates in the quark\nmodel are close to this ratio.",
"arxiv_id": "nucl-th/9511001",
"authors": [
"Nimai C. Mukhopadhyay",
"J. -F. Zhang",
"M. Benmerrouche"
],
"categories": [
"nucl-th",
"hep-ph"
],
"title": "Photoproduction of Etas and N$^*$(1535) Electrostrong Properties",
"url": "https://arxiv.org/abs/nucl-th/9511001"
},
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