Conveners
Parallel Session B3: Light baryons and mesons
- Karin Schönning (Uppsala University)
We present a study of the process $e^+e^-\to e^+e^- \eta'$ in the double-tag mode and a measurement for the first time of the $\gamma^{\star}\gamma^{\star} \to \eta'$ transition form factor $F_{\eta'}(Q_1^2, Q_2^2)$ in the momentum-transfer range 2 < $Q_{1}^{2}, Q_{2}^{2}$ < 60 GeV$^{2}$. The results for the form factor are compared with the predictions based on pQCD and VMD.
We also present...
We study the D+ -> pi+ eta eta and D+ -> pi+ pi0 eta reactions, which are single Cabibbo suppressed and can proceed both through internal and external emission. The primary mechanisms at quark level are considered, followed by hadronization to produce three mesons in the D+ decay, and after that the final state interaction of these mesons leads to the production of the a0(980) resonance,...
Strong interactions produce a rich spectrum of resonances which decay into three or more hadrons. Understanding their phenomenology requires a theoretical framework to extract parameters from experimental data and lattice QCD simulations of hadron scattering. Two classes of relativistic three-body approaches are currently being pursued: the EFT-based and unitarity-based one. We consider a...
