Exotic Hadron Spectroscopy 2024

Pion mass dependence in Dπ scattering and the D0∗(2300) resonance from lattice QCD

4 Jul 2024, 09:55

25m

Singleton Park Campus (Swansea University)

Talk Talks

Speaker

Mr Haobo Yan (Peking University)

Description

Lattice QCD results for isospin $I=\frac{1}{2}$ $D\pi$ scattering are presented. Utilizing a series of $N_{\text{f}}=2+1$ Wilson-Clover ensembles with pion masses of $m_{\pi }\approx 132,208,305$ and $317$ MeV, various two-particle operators are constructed and the corresponding finite-volume spectra are determined. The $S$ and $P$-wave scattering phase shifts are then extracted using the Lüscher approach. A clear trend for the motion of the $D_0^{\ast }(2300)$ pole is identified. With the physical pion mass configurations also included, this calculation constitutes the first lattice calculation in which the pion mass dependence of the $D_0^{\ast }(2300)$ pole is investigated and the scattering lengths are extrapolated/interpolated to the physical pion mass in $D\pi$ scattering.

Presentation materials

Exotic_Hadron_Spectroscopy_2024.pdf