Primakoff effect in eta-photoproduction off protons
| Popis: | We analyse data on forward eta-meson photoproduction off a proton target and extract the eta to gamma gamma decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our analysis is strongly constrained because it is fixed from a global fit to available gamma p to p eta data for differential cross sections and polarizations. We compare our results with present information on the two-photon eta-decay from the literature. We provide predictions for future PrimEx experiments at Jefferson Laboratory in order to motivate further studies. 5 pages, 6 figures, gamma-gamma*-eta form factor included, version to appear in Eur. Phys. J. A. |
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| Jazyk: | English |
| DOI: | 10.1140/epja/i2010-10961-7 |
| Přístupová URL adresa: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f8868a8755bc67ee7cabf848004f1dc http://arxiv.org/abs/1001.0646 |
| Rights: | OPEN |
| Přírůstkové číslo: | edsair.doi.dedup.....9f8868a8755bc67ee7cabf848004f1dc |
| Autor: | A. Sibirtsev, S. Krewald, J. Haidenbauer, Ulf-G. Meißner |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Particle physics
interaction [photon p] data analysis method Nuclear and High Energy Physics photon p --> p eta Proton Hadron eta --> 2photon FOS: Physical sciences radiative decay [eta] Gamma gamma High Energy Physics - Experiment Primakoff effect High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) interpretation of experiments [numerical calculations] ddc:530 Nuclear Experiment (nucl-ex) Nuclear Experiment width [eta] Physics photoproduction [eta] polarization High Energy Physics - Phenomenology Amplitude differential cross section High Energy Physics::Experiment |
| Zdroj: | The European physical journal / A 44, 169-173 (2010). doi:10.1140/epja/i2010-10961-7 |
| DOI: | 10.1140/epja/i2010-10961-7 |
| Popis: | We analyse data on forward eta-meson photoproduction off a proton target and extract the eta to gamma gamma decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our analysis is strongly constrained because it is fixed from a global fit to available gamma p to p eta data for differential cross sections and polarizations. We compare our results with present information on the two-photon eta-decay from the literature. We provide predictions for future PrimEx experiments at Jefferson Laboratory in order to motivate further studies. 5 pages, 6 figures, gamma-gamma*-eta form factor included, version to appear in Eur. Phys. J. A. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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