Property of Chiral Scalar and Axial-Vector Mesons in Heavy-Light Quark System
Abstract
We investigate the properties of new scalar XB, XD and axial-vector XB*, XD* mesons, which are recently predicted, in the covariant meson-classification scheme, to exist as the partners of ground-state pseudoscalar B, D and vector B*, D* mesons, respectively, realizing a linear representation of chiral symmetry for the light quark component in heavy-light-quark meson system. The mass splittings between the respective chiral partners are shown to be equal, and the decay widths of one pion emission of XB, XD, XB* and XD* become to have a common value, due to chiral and heavy quark symmetry.
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