Transverse strange quark spin structure of the nucleon
| Autor: | Tim Ledwig, Hyun-Chul Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Strange quark Nuclear Theory High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology Hyperon FOS: Physical sciences Down quark Omega baryon Nuclear Theory (nucl-th) Nuclear physics Strange matter High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Lattice Quark star Up quark High Energy Physics::Experiment Nucleon Nuclear Experiment |
| Popis: | We investigate the transverse quark spin densities of the nucleon with the lowest moment within the framework of the SU(3) chiral quark-soliton model, emphasizing the strange quark spin density. Based on previous results of the vector and tensor form factors, we are able to determine the impact-parameter dependent probability densities of transversely polarized quarks in an unpolarized nucleon as well as those of unpolarized quarks in a transversely polarized nucleon. We find that the present numerical results for the transverse spin densities of the up and down quarks are in good agreement with those of the lattice calculation. We predict the transvere spin densities of the strange quark. It turns out that the polarized strange quark is noticeably distorted in an unpolarized proton. 10 pages. 16 figures. Submitted to Physical Review D |
| Databáze: | OpenAIRE |
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