QCD and the Role of Gluonic Excitations
SURA Headquarters
1201 New York Ave NW Suite 430
Washington, DC 20005 USA
April 28-30, 2005
SURA Headquarters, Washington, D.C.
One of the outstanding questions in physics is to understand the mechanisms behind confinement of quarks. A series of new experiments, including the GlueX at JLab, CLEO-c at Cornell, or PANDA at GSI have been recently advanced to focus on this issue by searching for new kind of hadronic matter: hadrons with gluonic excitations. On the theory side progress in lattice gauge algorithms and available computer power have been providing new insights and stimulated development of phenomenological models. When confronting the new, high statistics data new challenges will emerge associated with amplitude analysis and their interpretation.
A small workshop to address these issues will be held in the SURA headquarters in Washington DC on February 10 to 12. The main goal of this workshop is to formulate the questions, which will be addressed at more depth at a second meeting to be held at SURA on April 29-30. The workshops will have three working groups, one on glueballs, one on hybrids and one on theoretical and phenomenological issues.
Workshop Goals
The purpose of this workshop is to bring together the experts in experiment and theory to review the:
- Progress in LQCD and evaluate the prospects of LQCD to make precise predictions about masses, widths, JPC and decay modes for glueballs and hybrids.
- Complementary information on glueballs and hybrids from QCD-inspired models
- Quality of the current evidence for glueballs and hybrids
- Amplitude analyses neede to determine the JPC of produced states. This involves an understanding of the phenomemenological issues that are common to and different between J/ψ decays and meson photoproduction. Those issues include, but are not limited to, understanding the limitations of the isobar model and how to move beyond it, the applicability of the Regge theory, and an understanding of what defines a resonance and the role of rescattering.
- Prospects for CLEO-c and GlueX to produce unambiguous results. This should include an understanding of how these programs complement or overlap with ongoing or planned experiments at other facilities
The deliverable from this workshop will be a 40-50 page white paper addressing the above points and where possible, come to conclusions and make recommendations.