6th Workshop on Future Directions in Spectroscopy Analysis (FDSA2025)

Session

GlueX/CLAS: Moments

9 Dec 2025, 11:30

DAM 7.24 Room (Facultat de Física, Universitat de Barcelona)

19. Moments of Angular Distribution of the K+K- System with CLAS12

Charlie Velasquez (University of York)

09/12/2025, 11:30

Talks

Since the prediction of the meson in 1935, facilities and institutions across the world have contributed to the discovery of over 200 distinct types, some of those being the well-known pions, kaons and J/Ψ. Understanding the properties of the mesons, including their spin, lifetime and mass, allows for the classification of this vast family of hadrons to be improved. This is particularly...

6. 2Pi0 Moment and Partial Wave Analysis

Alexandra Berger (University of Glasgow)

09/12/2025, 12:00

Talks

Quantum Chromodynamics (QCD) is the theory of the strong force and gives rise to a spectrum of hadrons. Hadrons such as qq̅ and qqq states have been observed but others, such as the gg (glueball) or the qq̅g (hybrid) state are not forbidden. A gg pair can share the same quantum numbers as a qq̅ meson, resulting in the ‘mixing’ of their respective states; the observed physical...

29. Angular analysis of $2\pi$ and $3\pi$ systems recoiling against $\Delta^{++}$ at GlueX

Ilia Belov

09/12/2025, 12:30

Talks

The GlueX experiment in Hall D at Jefferson Lab is designed for studies of light meson spectroscopy with a focus on searches for hybrid mesons that have exotic quantum numbers and therefore cannot be classified among conventional hadrons. The experimental facility exploits a tagged photon beam with energies from 3 GeV to 12 GeV incident on a liquid hydrogen fixed target. A significant part of...

12. A double-Regge exchange model for high-energy $\eta^{(\prime)}\pi$ photoproduction

Gloria Montana (Universitat de Barcelona & ICCUB)

Talks

The study of $\eta^{(\prime)}\pi$ photoproduction is particularly interesting for the search for the lowest lying hybrid meson with exotic quantum numbers, the $\pi_1(1600)$, at the GlueX experiment at Jefferson Lab. In this talk, I will present a model based on a double-Regge exchange of vector trajectories for $\eta^{(\prime)}\pi$ photoproduction at high energies. The model successfully...

20. Measurement of exclusive J/$\psi$ photoproduction with the CLAS12 experiment: unpolarized cross section and perspectives for polarization observables

Pierre Chatagnon (CEA Saclay)

Talks

The photo-production of vector mesons off the nucleon has long been established as an important tool to access the gluon content of the nucleon. In particular, the photo-production of J/$\psi$ near the threshold energy has been related to the Gluons Gravitational Form Factors of the nucleon. However, the validity of this interpretation must be tested and additional contributions such as open...