| Author(s) |
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|---|---|
| Abstract |
New results on the rare, doubly radiative decay η→π0γγ have been obtained from a revised analysis of the Crystal Ball experiment performed at the AGS. The analysis yields the first information on the dependence of the decay width, Γ(η→π0γγ), on the two-photon invariant mass squared, m2(γγ). A re-evaluation of the branching ratio is also made, BR(η→π0γγ)=(2.21±0.24stat±0.47syst)×10−4; it implies that the decay width is Γ(η→π0γγ)=0.285±0.031stat±0.061syst eV. These results are close to predictions based on chiral perturbation theory with vector-meson dominance. |
| Format | |
| Identifier(s) | |
| Publication Date |
2008-07-01
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| Publication Title |
Physical Review C
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| Volume |
78
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| Issue |
1
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| First Page |
015206-1
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| Last Page |
015206-10
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| Keywords | |
| Subject | |
| Community | |
| Recommended Citation |
Prakhov, S. N.; Nefkens, B. M.K.; Allgower, C. E.; Bekrenev, V. S.; Briscoe, W. J.; Comfort, J.; Craig, K.; Grosnick, D. P.; Isenhower, D.; Knecht, N.; Koetke, D. D.; Koulbardis, A.; Kozlenko, N. G.; Kruglov, S. P.; Lolos, G.; Lopatin, I. V.; Manley, D. Mark; Manweiler, R. W.; Marus˘ić, A.; McDonald, S.; Olmsted, J.; Papandreou, Z.; Peaslee, D. C.; Phaisangittisakul, N.; Price, J. W.; Ramirez, A. F.; Sadler, M.; Shafi, A.; Spinka, H.; Stanislaus, T. D.S.; Starostin, A.; Staudenmaier, H. M.; Supek, I. (2008). Measurement of the invariant-mass spectrum for the two photons from the η→π0γγ decay. Physical Review C 78(1) 015206-1-015206-10. doi: 10.1103/PhysRevC.78.015206. Retrieved from https://oaks.kent.edu/phypubs/139
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