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Polarization observables in the e+e- ->(Lambda)over-bar Lambda reaction
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
2016 (English)In: European Physical Journal A, ISSN 1434-6001, E-ISSN 1434-601X, Vol. 52, no 5, article id 141Article in journal (Refereed) Published
Abstract [en]

Cross-section, vector-polarization, and tensor-polarization distributions are calculated for the reactions e(+)e(-) -> (p) over barp and e(+)e(-) ->(Lambda) over bar Lambda . Each reaction requires six characteristic functions that are bilinear in the, possibly complex, electromagnetic Form factors, denoted G(E)(P-2) and G(M) (P-2), of p and A. For the hyperon reaction also the joint-decay distributions of A and A are calculated. Their knowledge allows a complete determination of the hyperon electromagnetic form factors, without measuring hyperon spins. We explain how this is done in practice. For some tensor-polarization components our results are in conflict with previously repeatedly published distributions.

Place, publisher, year, edition, pages
2016. Vol. 52, no 5, article id 141
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-305953DOI: 10.1140/epja/i2016-16141-yISI: 000384408600001OAI: oai:DiVA.org:uu-305953DiVA, id: diva2:1043730
Available from: 2016-10-31 Created: 2016-10-24 Last updated: 2017-11-29Bibliographically approved

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Fäldt, Göran

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