dorsal/arxiv
View SchemaAnalysis of resonance multipoles from polarization observables in eta photoproduction
| Authors | L. Tiator, D. Drechsel, G. Knoechlein, C. Bennhold |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9902028 |
| URL | https://arxiv.org/abs/nucl-th/9902028 |
| DOI | 10.1103/PhysRevC.60.035210 |
| Journal | Phys.Rev.C60:035210,1999 |
Abstract
A combined analysis of new eta photoproduction data for total and differential cross sections, target asymmetry and photon asymmetry is presented. Using a few reasonable assumptions we perform the first model-independent analysis of the E0+, E2- and M2- eta photoproduction multipoles. Making use of the well-known A3/2 helicity amplitude of the D13(1520) state we extract its branching ratio to the eta-N channel, Gamma(eta,N)/Gamma = (0.08 +- 0.01)%. At higher energies, we show that the photon asymmetry is extremely sensitive to small multipoles that are excited by photons in the helicity 3/2 state. The new GRAAL photon asymmetry data at higher energy show a clear signal of the F15(1680) excitation which permits extracting an F15(1680)->eta,N branching ratio of (0.15 +0.35 -0.10)%.
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"abstract": "A combined analysis of new eta photoproduction data for total and\ndifferential cross sections, target asymmetry and photon asymmetry is\npresented. Using a few reasonable assumptions we perform the first\nmodel-independent analysis of the E0+, E2- and M2- eta photoproduction\nmultipoles. Making use of the well-known A3/2 helicity amplitude of the\nD13(1520) state we extract its branching ratio to the eta-N channel,\nGamma(eta,N)/Gamma = (0.08 +- 0.01)%. At higher energies, we show that the\nphoton asymmetry is extremely sensitive to small multipoles that are excited by\nphotons in the helicity 3/2 state. The new GRAAL photon asymmetry data at\nhigher energy show a clear signal of the F15(1680) excitation which permits\nextracting an F15(1680)-\u003eeta,N branching ratio of (0.15 +0.35 -0.10)%.",
"arxiv_id": "nucl-th/9902028",
"authors": [
"L. Tiator",
"D. Drechsel",
"G. Knoechlein",
"C. Bennhold"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.60.035210",
"journal_ref": "Phys.Rev.C60:035210,1999",
"title": "Analysis of resonance multipoles from polarization observables in eta photoproduction",
"url": "https://arxiv.org/abs/nucl-th/9902028"
},
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