منابع مشابه
Constituent Quarks from Qcd
Starting from the observation that colour charge is only well defined on gauge invariant states, we construct perturbatively gauge invariant, dynamical dressings for individual quarks. Explicit calculations show that an infra-red finite mass-shell renormalisation of the gauge invariant, dressed propagator is possible and, further, that operator product effects, which generate a running mass, ma...
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Using a statistical approach in the framework of non–covariant perturbation theory the distributions for light and charmed quarks in the hadron have been derived, taking into account the mass of the charmed quark. The parameters of the model have been extracted from the comparison with NA3 data on hadroproduction of J/ψ particles. A reanalysis of the EMC data on charm production in muon– nucleo...
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We review the theory and present status of the proton spin problem with emphasis on the transition between current quarks and constituent quarks in QCD. Steven [email protected]
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It is argued that the constituent quarks are expected to show a non-trivial spin and flavor structure, due to the anomalous breaking of the chiral symmetry in the U(1) sector. CERN.TH.7079/93 November 1993 Supported in part by DFG-contract No. F412/19-1 and C.E.C. project SCI-CT-91-0729 Invited talk given at the Leipzig Workshop “Quantum Field Theory Aspects of High Energy Physics,” Kyffhäuser,...
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The universality of single-spin asymmetry on inclusive π-meson production is discussed. This universality can be related to the hadron substructure— constituent quarks in the frame of the quark model for U-matrix. Polarization experiments give us an unique opportunity to probe the nucleon internal structure. While spin averaged cross-sections can be calculated within acceptable accuracy, curren...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2016
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/678/1/012052