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《中国物理C》(英文)编辑部
2024年10月30日

EFFECTIVE-POTENTIAL STUDY OF DYNAMICAL CHIRAL SYMMETRY BREAKING IN QUANTUM CHROMODYNAMICS

  • Starting from QCD lagrangian with massless fermions and using the bilinear external sources, we derive the effective potential as a functional of composite operators, i.e.,functional of fermion propagator and gluon propagator, and then derive the Dyson--Schwinger equation for the propagators. There exist two sets of solution, the chiral-symmetry solution and chiralbreaking solution. By studying the asympotic solution of equation, we find that for the coupling constant beyond a critical value (α=1/4), a chiral-breaking solution is found, while for α<1/4 the chiral-symmetry consetrves. Using the asympotic behavior of the quark self-energy and the experimantal value for π ion decay constant fπ, we estimate the dynamical generated quark mass value, which is in agreement with the values obtained from other theoretical and experimental methods. Significance of the results are discussed.
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  • [1] G. Jona-Lasinio, Nuovo Cimento.; 34(1964), 1790; S. Coleman and E. Weinberg, Phys. Rev.,D7(1973),1888.[2] R. Jackiw, Phys. Rev., D9(1974), 1686.[3] J. Cornwall, R. Jackiw and E. TombouIis, Phys. Rev., DIO(1974), 2428.[4] R. W. Haymaker and J. Perez-Mercader, Phys, Rev., D27(1983), 1353.[5] K. T. Mahanthappa and J. Randa., Phys. Rev., D27(1983), 2500,[6] H. Pagels,and S.Stokar, Phys. Rev., D20(1979), 2947.[7] Lay-Nam Chang,Ngee-Pong Chang, Phys. Rev., D29(1984), 312.
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Get Citation
ZHU Chao-Yuan and HU Shi-Ke. EFFECTIVE-POTENTIAL STUDY OF DYNAMICAL CHIRAL SYMMETRY BREAKING IN QUANTUM CHROMODYNAMICS[J]. Chinese Physics C, 1987, 11(4): 451-461.
ZHU Chao-Yuan and HU Shi-Ke. EFFECTIVE-POTENTIAL STUDY OF DYNAMICAL CHIRAL SYMMETRY BREAKING IN QUANTUM CHROMODYNAMICS[J]. Chinese Physics C, 1987, 11(4): 451-461. shu
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Received: 1900-01-01
Revised: 1900-01-01
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EFFECTIVE-POTENTIAL STUDY OF DYNAMICAL CHIRAL SYMMETRY BREAKING IN QUANTUM CHROMODYNAMICS

    Corresponding author: ZHU Chao-Yuan,

Abstract: Starting from QCD lagrangian with massless fermions and using the bilinear external sources, we derive the effective potential as a functional of composite operators, i.e.,functional of fermion propagator and gluon propagator, and then derive the Dyson--Schwinger equation for the propagators. There exist two sets of solution, the chiral-symmetry solution and chiralbreaking solution. By studying the asympotic solution of equation, we find that for the coupling constant beyond a critical value (α=1/4), a chiral-breaking solution is found, while for α<1/4 the chiral-symmetry consetrves. Using the asympotic behavior of the quark self-energy and the experimantal value for π ion decay constant fπ, we estimate the dynamical generated quark mass value, which is in agreement with the values obtained from other theoretical and experimental methods. Significance of the results are discussed.

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