Spontaneous Breaking of Chiral Flavor Symmetry in QCD

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概要

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• The QCD vacuum state in the chiral limit is studied by extension of a formal scheme proposed recently for the Yang-Mills theory. Any state is represented as superposition of simultaneous eigenstates of the chirality operator X and the no-tunnelling part H_0 of the Hamiltonian. Three possible phases of the vacuum are specified in terms of its gauge- and flavor-invariant symmetry groups. The symmetric phase characterized by U(1)_x allows no tunnelling, while the asymmetric one has no symmetry group and chiral flavor symmetry is spontaneously broken. There may appear an intermediate phase, which is characterized by a discrete subgroup Zn_f of U(1)_x. Our scheme is shown to remove a long-standing inconsistency between the vacuum structure and anomalous Ward identities.

• 理論物理学刊行会の論文
• 1982-02-25

著者

• Ida Masakuni

  Physics Department Kobe University

• Okada Junji

  Graduate School Of Science And Technology Kobe University

関連論文

• Generalized Tunnellings in the Yang-Mills Theory
• Spontaneous Breaking of Chiral Flavor Symmetry in QCD

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