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The "Proton Spin Crisis" - a Quantum Query
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-7200-4962
2010 (English)In: Progress in Physics, ISSN 1555-5534, E-ISSN 1555-5615, Vol. 3, 51-52 p.Article in journal (Refereed) Published
Abstract [en]

The "proton spin crisis" was introduced in the late 1980s, when the EMC-experiment revealed that little or nothing of a proton's spin seemed to be carried by its quarks. The main objective of this paper is to point out that it is wrong to assume that the proton spin, as measured by completely di erent experimental setups, should be the same in all circumstances, an assumption explicitly made in all present theoretical treatments of the "crisis". As spin is a genuine quantum property, without any objective existence outside its measuring apparatus context, proper account of quantum mechanical measurement theory must be taken.

Place, publisher, year, edition, pages
2010. Vol. 3, 51-52 p.
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Fysik
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URN: urn:nbn:se:ltu:diva-3285Local ID: 11893420-3357-11df-b933-000ea68e967bOAI: oai:DiVA.org:ltu-3285DiVA: diva2:976142
Note
Godkänd; 2010; 20100319 (hansson)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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