14th International Workshop on e⁺e⁻ collisions from Phi to Psi 2026

Session

Exotic hadrons

11 Jun 2026, 11:00

Scuola Normale Superiore, Aula Dini, Palazzo del Castelletto (Pisa)

59. Exotic hadron studies at BESIII

Yuping Guo (Fudan University)

11/06/2026, 11:00

Using the unique data samples collected with the BESIII detector at the $J/\psi$ and $\psi(3686)$ resonances, as well as fine energy-scan data in the center-of-mass energy range from 3.7 to 4.95 GeV, extensive studies of exotic hadrons in the charmonium and light-hadron sectors have been carried out. In this talk, recent highlights from BESIII on the study of exotic hadrons will be presented.

21. Studies of hadron spectroscopy at Belle and Belle II

Federico Testa (Infn Torino)

11/06/2026, 11:25

The Belle and Belle II experiments have collected a $1.6~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at center-of-mass energies near the $\Upsilon(nS)$ resonances. These data include a $19.2~\mathrm{fb}^{-1}$ sample of data collected at center-of-mass energies near the $\Upsilon(10753)$ resonance. We present several results related to the following processes: $e^+ e^-\to h_b(1P)\eta$,...

41. Light Exotics at BESIII

Emma Di Fiore (Istituto Nazionale di Fisica Nucleare)

11/06/2026, 11:45

Using the world’s largest samples of J/ψ and ψ(3686) events produced in e+e- annihilation, BESIII is uniquely positioned to investigate light hadrons in radiative and hadronic charmonium decays. This includes detailed studies of exotic hadron candidates such as multiquark states, hybrid mesons and glueballs. Recent highlights on the light exotics searches, including a glueball-like particle...

11. Coupled-channel Omn\`es matrix for the $D$-wave isoscalar $\pi\pi/K\bar K$ system and its application to $J/\psi\to\pi^{0}\pi^{0}\gamma,\,K_{S}K_{S}\gamma$

Igor Danilkin (Johannes Gutenberg University of Mainz)

11/06/2026, 12:05

In this work, we construct the $D$-wave isoscalar $\pi\pi/K\bar K$ coupled-channel Omn`es matrix, formulated to satisfy unitarity, analyticity, and the appropriate asymptotic behavior. We employ a two-channel $K$-matrix model containing poles associated with the $f_{2}(1270)$ and $f_{2}'(1525)$ resonances. The resulting unitary scattering matrix, which reproduces the experimental...