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Quark Virtuality and QCD Vacuum Condensates |
| ZHOU Li-Juan1,2;MA Wei-Xing1,3 |
| 1Department of Information and Computing Sciences, Guangxi University of Technology, Liuzhou 545006
2Department of Physics, Guangxi University, Nanning 530004
3Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039 |
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| Cite this article: |
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ZHOU Li-Juan, MA Wei-Xing 2004 Chin. Phys. Lett. 21 1471-1474 |
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Abstract Based on the Dyson--Schwinger equations (DSEs) in the `rainbow' approximation, we investigate the quark virtuality in the vacuum state and quantum-chromodynamics (QCD) vacuum condensates. In particular, we calculate the local quark vacuum condensate and quark-gluon mixed condensates, and then the virtuality of quark. The calculated quark virtualities are λ 2u,d = 0.7GeV2 for u,d quarks, and λ 2s = 1.6GeV2 for s quark. Our theoretical predictions are consistent with empirical values used in QCD sum rules, and also fit to lattice QCD predictions.
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| Keywords:
14.65.Bt
24.85.+p
12.38.Lg
12.38.Cy
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Published: 01 August 2004
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| PACS: |
14.65.Bt
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(Light quarks)
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24.85.+p
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(Quarks, gluons, and QCD in nuclear reactions)
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12.38.Lg
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(Other nonperturbative calculations)
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12.38.Cy
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(Summation of perturbation theory)
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