Mass and Γ3π0/Γγγ decay branching ratio of theη-meson from the p(γ, η)p reaction

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Mass and Γ3π0/Γγγ decay branching ratio of theη-meson from the p(γ, η)p reaction

B. Krusche S. Hlaváč R.o. Owens K. H. Kaiser Gisela Anton I. Anthony V. Metag J. Peise J. Ahrens R. Beck H. Ströher M. Fuchs A. R. Gabler A. Schubert M. Röbig-landau R.s. Simon S.j. Hall F. Härter V. Tries G.j. Miller J. D. Kellie

subject

Nuclear physics Physics Nuclear and High Energy Physics Near threshold Meson Spectrometer Proton Branching fraction Nuclear fusion Threshold energy

description

Near threshold photoproduction ofη-mesons from the proton has been measured at the MAMI accelerator with the TAPS spectrometer. The mass of theη-meson was deduced from the threshold energy forη-photoproduction. The result of m η =(547.12 ± 0.06 ± 0.25) MeV supports the low value of theη-mass reported from a dp →3Heη measurement at SATURNE in 1992. Theη-decay branching ratio Γ3π0/Γγγ was measured to be (0.832±0.005±0.012).

year	journal	country	edition	language
1995-09-01	Zeitschrift für Physik A Hadrons and Nuclei

https://doi.org/10.1007/bf01290901

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