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Diquarks
Dipartimento di Fisica Teorica, Università di Torino and Istituto Nazionale di Fisica Nucleare, Sezione di Torino.
Dipartimento di Fisica Teorica, Università di Torino and Istituto Nazionale di Fisica Nucleare, Sezione di Torino.
Kungliga tekniska högskolan, KTH.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
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1993 (English)In: Reviews of Modern Physics, ISSN 0034-6861, E-ISSN 1539-0756, Vol. 65, no 4, p. 1199-1233Article in journal (Refereed) Published
Abstract [en]

It is becoming increasingly clear that the concept of a diquark (a two-quark system) is important for understanding hadron structure and high-energy particle reactions. According to our present knowledge of quantum chromodynamics (QCD), diquark correlations arise in part from spin-dependent interactions between two quarks, from quark radial or orbital excitations, and from quark mass differences. Diquark substructures affect the static properties of baryons and the mechanisms of baryon decay. Diquarks also play a role in hadron production in hadron-initiated reactions, deep-inelastic lepton scattering by hadrons, and in e+e- reactions. Diquarks are important in the formation and properties of baryonium and mesonlike semistable states. Many spin effects observed in high-energy exclusive reactions pose severe problems for the pure quark picture of baryons and might be explained by the introduction of diquarks as hadronic constituents. There is considerable controversy, not about the existence of diquarks in hadrons, but about their properties and their effects. In this work a broad selection of the main ideas about diquarks is reviewed.

Place, publisher, year, edition, pages
1993. Vol. 65, no 4, p. 1199-1233
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Other Physics Topics
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Fysik
Identifiers
URN: urn:nbn:se:ltu:diva-13312DOI: 10.1103/RevModPhys.65.1199ISI: A1993MM65700003Scopus ID: 2-s2.0-12044259177Local ID: c8539bc0-eb82-11db-88eb-000ea68e967bOAI: oai:DiVA.org:ltu-13312DiVA, id: diva2:986265
Note
Godkänd; 1993; 20070415 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Fredriksson, Sverker

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