EMMI Rapid Reaction Task Force: Impact of Vector Mesons on the studies of the 3D structure of the nucleon

Participation in the RRTF is by invitation only.

The EMMI Rapid Reaction Task Force (RRTF) meeting, titled
“Impact of Vector Mesons on the Studies of the 3D Structure of the Nucleon,”
will be held at CERN from 15 to 18 June 2026.

In accordance with the RRTF framework, this strategic working meeting is designed to bring together a focused group of world-leading experts to address a specific scientific challenge: the significant and often complicating role of diffractive vector mesons (VMs) in the interpretation of 3D nucleon structure data. While hadron production in Deep Inelastic Scattering (DIS) is a primary tool for mapping quark-gluon dynamics through TMDs and GPDs, the presence of exclusive VMs can substantially modify multiplicities and spin asymmetries, potentially biasing phenomenological extractions.

The primary goal of this RRTF is to move beyond the standard conference format and establish a unified theoretical and experimental roadmap. Participants will engage in intensive discussions and collaborative problem-solving to define rigorous strategies for VM subtraction and to develop the next generation of Monte Carlo and AI-based tools required for high-precision data interpretation at facilities such as JLab and the future EIC.

The scientific programme will focus on the following topics:

1. Theory of vector-meson production

2. Experimental measurements of vector mesons in leptoproduction and Monte Carlo development

3. Identifying the critical path for helicity-amplitude extractions using Artificial Intelligence tools: LOGISTIC and SCOPE

Format:
The meeting will consist of informal presentations and extended round-table working sessions aimed at producing a final RRTF report.

Duration:
The workshop will span four days, concluding on Thursday, 18 June.
Friday, 19 June is reserved exclusively for the Organizing Committee to synthesize the working-group results, finalize the draft RRTF report, and outline the follow-up publication.

Attendance:
Participation is by invitation only to ensure a focused and productive environment for these high-level technical discussions.

Workshop Organizers:
H. Avagyan, B. Parsamyan, P. Rossi

ZOOM LINK:

Join Zoom Meeting

Meeting ID: https://cern.zoom.us/j/61202587876?pwd=gf2E6ozEaYuFTbqOWmkt43ZIO16ah0.1
Passcode: 89218921

Information for participants

Instructions for speakers

Symposium talks

Such a presentation is targeting a general audience, consisting of many doctoral students and postdocs. It should have an extended general introduction, summarize the present status and point out open issues and possible future developments.

Duration: 40 minutes + discussions

RRTF talks

Such a presentation is targeting a more specialized audience. A brief introduction should be given. Emphasis should be given to latest developments, open issues and possible future developments. 

Duration: 30 minutes + discussion