The Meson Spectroscopy Program Using the Forward Tagger with CLAS12 at Jefferson Lab

Abstract

Abstract. The 12 GeV upgrade to the Continuous Electron Beam Accelerator Facility (CEBAF) will enable a new generation of experiments in hadronic nuclear physics at Jefferson Lab, seeking to address fundamental questions in QCD. For example, confirming the existence of exotic states, suggested by both quark models and lattice calculations, would allow gluonic degrees of freedom to be explored, and may help explain the role played by gluons in the QCD interaction. In Experimental Hall B, meson spectroscopy (the MesonEx experiment) will be performed using low Q 2 electron scattering to produce quasi-real photons. The scattered electron is detected at small angles by the Forward Tagger device, determining the properties of the photon on an event-by-event basis. This technique has notable advantages over real photon beams, and over hadronic beam experiments, where most experimental data exists. This article will focus on the development of the Forward Tagger by the INFN Genova group, and the proposed MesonEx experiment.

Analysis of recent CLAS data on f1(1285) photoproduction

“…To warrant expanding efforts in this direction, more precise data for f 1 (1285) photoproduction are necessary. The near future CLAS12@JLab experiment [24,25] may provide great opportunities for research in this direction.…”