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Experimental study of the inclusive η-spectrum from p {Mathematical expression} annihilations at rest in liquid hydrogen
Research Institute of Physics, Stockholm.
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1989 (English)In: Zeitschrift für Physik C Particles and Fields, ISSN 0170-9739, E-ISSN 1431-5858, Vol. 42, no 1, 49-58 p.Article in journal (Refereed) Published
Abstract [en]

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(ηρ{variant})/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 0π 0)=0.65±0.14, BR(ηη)/BR(π 0π 0), BR(ηη ′)/BR(π 0π 0) at 95% CL, and BR(ηη)/BR(ηπ 0). © 1989 Springer-Verlag.

Place, publisher, year, edition, pages
Springer, 1989. Vol. 42, no 1, 49-58 p.
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Physical Sciences
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URN: urn:nbn:se:lnu:diva-28484DOI: 10.1007/BF01565127OAI: oai:DiVA.org:lnu-28484DiVA: diva2:643775
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Source: Scopus

Available from: 2013-08-28 Created: 2013-08-26 Last updated: 2017-12-06Bibliographically approved

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Carius, Staffan

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