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Bridges between Theory and Experiment ..and Beyond

Explore the intersection of theory and experiment in hadron physics with a focus on QCD fundamentals, new multidimensional distribution functions, and cutting-edge experiments such as the GlueX project. Enhance collaboration and data analysis techniques for a deeper understanding of nucleon substructure and beyond-standard-model physics.

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Bridges between Theory and Experiment ..and Beyond

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  1. Bridges between Theory and Experiment ..and Beyond Patrizia Rossi A New Era for Hadro-Particle Physics – Newport News June 23-24,2016

  2. The 21st Century Science Questions • What is the role of gluonic excitations in the spectroscopy of light mesons? • Where is the missing spin in the nucleon? • What is the role of orbital angular momentum? • Can we reveal a novel landscape of nucleon substructure through measurements of new multidimensional distribution functions? • What is the relation of short-range nuclear structure and parton dynamics? • Can we discover evidence for physics • beyond the standard model • of particle physics?

  3. QCD at work • Precise and abundant data from the new generation experiments • Adequate theoretical and phenomenological framework to analyze and correctly interpret the data. • Close collaboration between theorists, phenomenologists, and experimentalists worldwide. FF’s GPD’s TMD’s PDF’s Exotics Hybrids Missing States ……

  4. GlueX Experiment • First large data set collected during Spring 2016 (~2.5 months) • 25 billion collected trigger • ≈10×109 PARA as wellas PERP (polarized) events

  5. 3D Imaging of the Nucleon New theoretical framework: TMDs & GPDs TMD cross section • x-section has a number of azimuthal moments appearing as convolution of 3D PDFs and FFs

  6. CLAS12 SIDIS AUT with Transverse Proton Target

  7. Extraction and Validation of TMDs SIDIS,DY,e+/e- experiments Hard Scattering MC+RC Library for Structure Function (SF) calculations has 3D PDF and FF (models, parametrizations) QCD fundamentals Radiative x-section x-section calculations SF calculations Hard Scattering Data Counts (x-sections, multiplicities,….) Defined set of assumptions Extract SFs Extract 3D PDFs Validation of extracted 3D PDFs (for a given set of assumptions) phenomenology Development of a reliable techniques for the extraction of 3D PDFs and fragmentation functions from the multidimensional experimental observables with controlled systematics requires close collaboration of experiment, theory and computing

  8. JLab Theory Division’s Answer Extremely well !! • Effective communication • Strong support of the JLab program • Strengthening of the group in the TMD and GPD analysis • Broadening of the partial wave analysis effort • Expanding the lattice effort which plays a major role across spectrum of US and International lattice activities • Fostering collaborations

  9. Joint Physics Analysis Center (JPAC) @ JLab Szczepaniak It was set up in October 2013 to support the extraction of physics results from analysis of experimental data from JLab12 and other accelerator laboratories. JPAC Review (May 3-4/2016) Charge: “… solicit your opinion on the scope and quality of the work performed under the JPAC umbrella, its relevance and importance to the JLab physics program, as well as to the wider hadron community, and your advice on research directions for the future.” Report: Very positive, recommend continuing funding/ support

  10. HASPECT (HAdronSPEctroscopyCenTer) Develop the necessary strategy and tools for the future analysis in hadron spectroscopy. • Set up a common analysis framework • Grab theoretical amplitude from JPAC • Define a list of benchmark and golden channels

  11. Fostering Collaborations _ q q  • Since Mike's time here: • 3 Joint Appointments: Indiana University, ODU, W&M                            • 3 Bridged Appointments: Indiana University, GWU, Penn State                • He is currently working on adding a 5 year bridge @ W&M • He is also working in conjunction with IT (Amber Boehnlein) to add 2 bridge appointments with ODU in their Computer Science Department with the possibility of adding 2 more joints in their Mathematics and Statistics Department in the future.

  12. Building a bridge.. Theory Exp Thank you !

  13. Breaking News Mike's real reason for returning to the UK !!

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