Discussion 07-01-24

Speakers and participants, please review the guidance provided on the main page. This agenda page is editable by anyone that has a Jefferson Lab computing account. Feel free to log in and post comments, questions, or answers to questions in the section below.

Meeting Location

The 22 GeV Open Discussions will be held here:

• Date/Time: Monday, July 1 at 12:30 PM Jefferson Lab Local Time
• Physical Location: CEBAF Center F224/5
• Virtual Location: Zoom Meeting Number 161 111 8017 (The password is the two-digit number that appears before "GeV" in the first sentence of this section.

Agenda

• Organizational Updates (Matt)
• Threshold J/ψ production and proton gravitational form factors (Lubomir Pentchev)

Comments and Questions

• Measuring the differential cross section of charmonium production from threshold to O(~100GeV) establishes if there is a common production mechanism across the entire energy range. If this the case one can use the high energy phenomenology and QCD arguments to evaluate the gluon form factors of the nucleon. This would be a discovery of a new QCD phenomenon, since what is known so far from e.g. from light vector mesons is that threshold and high energy production are driven by very different mechanisms (e.g. production of N^*’s vs diffraction). (From Adam S.)