Conveners
Parallel session A4
- Daniel Winney (ICN-UNAM)
The BESIII experiment, with its unique data samples collected in the √s = 4.0 – 4.95 GeV region, continues to provide important inputs for the understanding of charmonium and exotic XYZ states. In this talk, we will present recent activities related to X- and Z-states. Key results include a multi-channel joint analysis of the Zc(4020), a search for a charmonium-like state with exotic quantum...
We discuss the production of $D \bar{D}$ pairs in $e^+ e^-$ collisions,
where $D$ refers to either $D^0$ or $D^+$ [1].
The continuum mechanism with the $t/u$-channel vector-meson $D^*$
exchanges are considered. The results of the calculation depend
on the parameter of the off-shell form-factor for the virtual $D^*$
mesons. The $D^* D \gamma$ coupling constants are found from
the $D^*...
We present the spectrum of the $D\pi$ meson-meson scattering system on the 2+1-flavor lattice ensembles X451 and N451 produced by the CLS consortium with pion masses of approximately 287 MeV. The spectrum was produced for center-of-mass momenta up to $P^2=4$. The employed heavy-quark action was tuned non-perturbatively using a neural network and continuum charmonium ground-state masses. Meson...
One or two $D_0^*$ resonances with strangeness $S=0$, isospin $I=1/2$ dynamically generated in pseudo-scalar meson octet and heavy mesons scattering are still a puzzle. In this talk, I will present that there are two $D_0^*$ resonances generated by ChPT up to NLO. The LECs of the interaction are constrained by the energy levels simulated by LQCD in $(S,I)=(0,1/2)$, $(1,0)$, $(-1,0)$, and...
