Nature of the D_0 meson in the D pi scattering with chiral symmetry

We study the nature of the scalar D_0 meson from the viewpoint of chiral symmetry. With the linear representation of chiral symmetry, we construct the D pi scattering amplitude satisfying the chiral low-energy theorem, in which the D_0 meson appears as an s-wave resonance. We show that the propertie...

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Bibliographic Details
Published in:arXiv.org 2019-04
Main Authors: Sugiura, Takumi, Hyodo, Tetsuo
Format: Article
Language:English
Subjects:
Scattering amplitude
Symmetry
Online Access:Get full text
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Summary:We study the nature of the scalar D_0 meson from the viewpoint of chiral symmetry. With the linear representation of chiral symmetry, we construct the D pi scattering amplitude satisfying the chiral low-energy theorem, in which the D_0 meson appears as an s-wave resonance. We show that the properties of the D_0 meson can be successfully reproduced as the chiral partner of the D meson coupled with the D pi scattering states. At the same time, we find that the spectral function and the pole position of D_0 are not very sensitive to the reduction of the chiral condensate, indicating the importance of the dressing of the bare state by the D pi molecular component.
ISSN:2331-8422
DOI:10.48550/arxiv.1904.00589