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Using $N_f = 2+1$ clover fermions across six gauge ensembles generated by the CLQCD collaboration, this work performs simultaneous chiral and continuum extrapolations to determine the electromagnetic properties of charmed mesons, providing the first lattice QCD calculations for the magnetic moments and radii of $D^{\ast+}$ and $D_s^\ast$, and filling the gap for the $D_s^*$ charge radius. The preliminary numerical results yield the charge radii squared as $(r_c)_D^2=0.175(19)~\text{fm}^2$, $(r_c)_{D^{\ast+}}^2=0.206(15)~\text{fm}^2$, $(r_c)_{D_s}^2=0.111(11)~\text{fm}^2$, and $(r_c)_{D^{\ast}_s}^2=0.156(9)~\text{fm}^2$; the magnetic dipole moments as $(G_M)_{D^{\ast+}}=2.138(44)$ and $(G_M)_{D_s^{\ast+}}=2.208(26)$; and the magnetic radii squared as $(r_m)_{D^{\ast+}}^2=0.41(16)~\text{fm}^2$ and $(r_m)_{D_s^{\ast}}^2=0.277(86)~\text{fm}^2$.
| 请选择分会 | 强子物理与味物理 |
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