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Experimental study of the inclusive η-spectrum from proton-antiproton annihilations at rest in liquid hydrogen
Stockholm University, Faculty of Science, Department of Physics.
Institute for Physics, University of Basle.
Stockholm University, Faculty of Science, Department of Physics, The Manne Siegbahn Laboratory.
Stockholm University, Faculty of Science, Department of Physics, The Manne Siegbahn Laboratory.
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1989 (English)In: Zeitschrift für Physik C Particles and Fields, ISSN 0170-9739, E-ISSN 1431-5858, Vol. 42, 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(ηρvariant)/BR(ηω)=0.51-0.06+0.20. For the ratio of branching ratios into two pseudoscalar mesons, we have BR(ηπ0)/BR(π0π0)=0.65±0.14, BR(ηη)/BR(π0π0), BR(ηη′)/BR(π0π0) at 95% CL, and BR(ηη)/BR(ηπ0). © 1989 Springer-Verlag.

Place, publisher, year, edition, pages
1989. Vol. 42, 49-58 p.
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:su:diva-46060DOI: 10.1007/BF01565127OAI: oai:DiVA.org:su-46060DiVA: diva2:371451
Note
cited By (since 1996) 9Available from: 2010-11-20 Created: 2010-11-20 Last updated: 2017-12-12Bibliographically approved

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Department of PhysicsThe Manne Siegbahn Laboratory
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Zeitschrift für Physik C Particles and Fields
Subatomic Physics

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