# Nature of the ${D}_{0}^{*}$ meson in $D\pi$ 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 ${D}_{0}^{*}$ 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.

Published in: Physical Review C 99 (2019)