1. UK Hadron Physics D. G. Ireland 10 October 2014 NuPECC Meeting, Edinburgh

2. 1 Nuclear Physics Landscape

3. 2 Key Physics Questions Generation of Mass Confinement Nucleon Spin

4. 3 Which facilities are used? Glasgow Edinburgh MAX-Lab, Lund Mainz Jefferson Lab

5. 4 Jefferson Lab (and 12 GeV Upgrade) 8 January 2014 New Hall Add arc Enhanced capabilities in existing Halls Add 5 cryomodules 20 cryomodules Upgrade arc magnets and supplies CHL upgrade The completion of the 12 GeV Upgrade of CEBAF was ranked the highest priority in the 2007 NSAC Long Range Plan. Scope of the project includes: Doubling the accelerator beam energy New experimental Hall and beamline Upgrades to existing Experimental Halls

6. 5 JLab - Hall A High Resolution Spectrometers, plus BigBite

7. 6 JLab - Hall A Upgrade High Resolution Spectrometers, plus BigBite plus Super Bigbite Spectrometer (SBS)

8. JLab – Hall B 7

9. JLab – Hall B Upgrade 8 CLAS12 Forward Tagger

10. 9 The MAMI Facility 100% duty factor electron microtron MAMI-C 1.5 GeV upgrade (MAMI-B 0.85 GeV) One of the MAMI-C magnets  e

11. 10 Crystal Ball at MAMI   E  ~ 2 MeV 10 8  sec -1

12. 11 Nucleon Structure

13. 12 Reactions Elastic Scattering Semi-Inclusive Deep Inelastic Scattering (SIDIS) Deeply Virtual Compton Scattering (DVCS)

14. 13 Nucleon Form Factors Q 2 =q 2 - 2

15. 14 Quark Distributions JLab Upgrade 14 Projected SBS/BB data 11 GeV 8.8 GeV 6.6 GeV

16. 15 Baryon Resonances Quark Model N* Resonances Lattice QCD Quark Model  * Resonances

17. 16 CLAS results γ p → K + Λ → K + pπ - Bonn-Gatchina Coupled Channel Analysis, A.V. Anisovich et al, EPJ A48, 15 (2012) (Includes nearly all new photoproduction data) M. Mc Cracken et al. (CLAS), Phys. Rev. C 81, 025201, 2010 R. Bradford et al. (CLAS), Phys.Rev. C75, 035205, 2007

18. 17 Evidence for new N* states and couplings

19. 18 Coherent Pion Photoproduction Angular distribution of  0 → PWIA contains the matter form factor  0 final state interactions - use latest complex optical potentials tuned to  -A scattering data. Corrections modest at low pion momenta Photon probe Interaction well understood  0 meson – produced with ~equal probability on protons AND neutrons. Reconstruct   from   →  decay d  /d  PWIA) = (s/m N 2 ) A 2 (q  */2k  ) F 2 (E  ,    ) 2 |F m (q)| 2 sin 2   

20. 19 208 Pb neutron skin

21. 20 Comparison with previous measurements Pion scattering PREX  r np Proton scattering Antiprotonic atoms Heavy ion diffusion Electric dipole Pygmy dipole } Coherent pion Droplet Nstar + QMC Latimer Tsang Analyses using theory, expt, observation.

22. 21 Future directions

23. 22 Structure Functions kyky kxkx -0.5 0.5 0.0 -0.5 0.00.5 b x [fm] Anselmino et al., 2009 QCDSF/UKQCD Coll., 2006 2+1 D picture in momentum space2+1 D picture in impact-parameter space TMDs GPDs Semi-Inclusive Accessed through Semi-Inclusive DIS OAM through spin-orbit correlations? Accessed through exclusive processes Ji sum rule for nucleon spin F 1T ┴ (x) [Sivers function] quark density Lattice QCD

24. 23 Future directions… Hadron Spectroscopy Exotic mesons Very strange baryons

25. 24 The Search for “Dark Photons”

26. 25 Sea quarks and the glue that binds us all Proton parton density functions (PDFs)

27. 26 Electron-Ion Collider Designs Stage I Stage II eRHIC @ BNL MEIC / EIC @ JLab 13 – 70 √s = 13 – 70 GeV E e = 3 – 12 GeV E p = 15 – 100 GeV E Pb = up to 40 GeV/A 34 – 71 √s = 34 – 71 GeV E e = 3 – 5 (10 ?) GeV E p = 100 – 255 GeV E Pb = up to 100 GeV/A 180 √s = up to ~180 GeV E e = up to ~30 GeV E p = up to 275 GeV E Pb = up to 110 GeV/A 140 √s = up to ~140 GeV E e = up to 20 GeV E p = up to at least 250 GeV E Pb = up to at least 100 GeV/A (EIC) (MEIC)(MEIC)(MEIC)(MEIC)

28. 27 Summary Glasgow Edinburgh MAX-Lab, Lund Mainz Jefferson Lab

29. 28