Nature of the D0* meson in Dπ scattering with chiral symmetry

Sugiura, Takumi (Department of Physics, Kyoto University, Kyoto 606-8502, Japan) ; Hyodo, Tetsuo (Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan)

12 June 2019

Abstract: We study the nature of the scalar D0* meson from the viewpoint of chiral symmetry. With the linear representation of chiral symmetry, we construct the Dπ scattering amplitude satisfying the chiral low-energy theorem, in which the D0* meson appears as an s-wave resonance. We show that the properties of the D0* meson can be successfully reproduced as the chiral partner of the D meson coupled with the Dπ scattering states. At the same time, we find that the spectral function and the pole position of D0* are not very sensitive to the reduction of the chiral condensate, indicating the importance of the dressing of the bare state by the Dπ molecular component.

Published in: Physical Review C 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevC.99.065201
License: CC-BY-4.0

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