Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
We extend our previous formulation of low-energy QCD in terms of an effective lagrangean containing operators of dimensionality d ≤ 6 constructed with pseudoscalars and quark fields, describing physics below the scale of chiral symmetry breaking. We include in this paper the vector and axial-vector channels. We follow closely the Extended Chiral Quark Model approach and consistently work in the large-Nc and leading log approximation and take into account the constraints from chiral symmetry and chiral symmetry restoration. The optimal fit of all parameters gives further support to a heavy scalar meson with a mass ∼ 1 GeV and a value of the axial pion-quark coupling constant gA ≃ 0.55 to 0.66, depending on some assumptions concerning the Weinberg sum rules.
Язык оригинала | английский |
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Журнал | Journal of High Energy Physics |
Том | 3 |
Номер выпуска | 10 |
Состояние | Опубликовано - 1 дек 1999 |
ID: 41031590