Experimental study of the inclusive η-spectrum from proton-antiproton annihilations at rest in liquid hydrogen

Experimental study of the inclusive η-spectrum from proton-antiproton annihilations at rest in liquid hydrogen

The inclusive η-momentum spectrum from Mathematical expression annihilations at rest in liquid hydrogen was measured at LEAR. Branching ratios were obtained for Mathematical expression, and ηη(8.1±3.1)×10 -5 . An upper limit for Mathematical expression of 1.8×10 -4 at 95% CL was found. The rat...

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Veröffentlicht in:Zeitschrift für Physik. C, Particles and fields Particles and fields, 1989, Vol.42, p.49
Hauptverfasser: Adiels, Lars, Backenstoss, G., Bergström, I., Carius, S., Charalambous, S., Cooper, M. D., Findeisen, C., Hatzifotiadou, D., Hugi, M., Kerek, A., Meyer, M., Pavlopoulos, P., Repond, J., Tauscher, L., Troester, D., Williams, M. C. S., Zioutas, K.
Format: Artikel
Sprache:eng
Schlagworte:
Elementarpartikelfysik
Elementary particle physics
Fysik
NATURAL SCIENCES
NATURVETENSKAP
Physics
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Zusammenfassung:The inclusive η-momentum spectrum from Mathematical expression annihilations at rest in liquid hydrogen was measured at LEAR. Branching ratios were obtained for Mathematical expression, and ηη(8.1±3.1)×10 -5 . An upper limit for Mathematical expression of 1.8×10 -4 at 95% CL was found. The ratio of the branching ratios is BR(ηρvariant)/BR(ηω)=0.51 -0.06 +0.20 . For the ratio of branching ratios into two pseudoscalar mesons, we have BR(ηπ 0 )/BR(π 0 π 0 )=0.65±0.14, BR(ηη)/BR(π 0 π 0 ), BR(ηη ′ )/BR(π 0 π 0 ) at 95% CL, and BR(ηη)/BR(ηπ 0 ). © 1989 Springer-Verlag.
ISSN:0170-9739
1431-5858
DOI:10.1007/BF01565127