1. 12 GeV Science Program R. D. McKeown JSA Science Council January 7, 2011 Thanks to A. Lung, L. Cardman, others

2. 2 12 GeV Science Program12 GeV Science Program The physical origins of quark confinement (GlueX, meson and baryon spectroscopy) The spin and flavor structure of the proton and neutron (PDF’s, GPD’s, TMD’s…) The quark structure of nuclei Probe potential new physics through high precision tests of the Standard Model Defining the Science Program: –Five Reviews: Program Advisory Committees (PAC) 30, 32, 34, 35, 36 –2006 through 2010 –Results: 37 experiments approved ; 12 conditionally approved –PAC37 scheduled January 2011: 9 new proposals, continue rankings Exciting slate of experiments for 4 Halls planned for initial five years of operation! 2

3. 3 12 GeV Upgrade Project12 GeV Upgrade Project Upgrade is designed to build on existing facility: vast majority of accelerator and experimental equipment have continued use New Hall Add arc Enhanced capabilities in existing Halls Add 5 cryomodules 20 cryomodules Scope of the project includes: Doubling the accelerator beam energy New experimental Hall and beamline Upgrades to existing Experimental Halls Maintain capability to deliver lower pass beam energies: 2.2, 4.4, 6.6…. Upgrade arc magnets and supplies CHL upgrade 3

4. 4 Hall D – exploring origin of confinement by studying exotic mesons Hall B – understanding nucleon structure via generalized parton distributions Hall C – precision determination of valence quark properties in nucleons and nuclei Hall A – short range correlations, form factors, hyper-nuclear physics, future new experiments (e.g. PV and Moller) 12 GeV Scientific Capabilities

5. 5 Quantum Numbers of Hybrid Mesons Quarks Excited Flux Tube Hybrid Meson like Exotic Flux tube excitation (and parallel quark spins) lead to exotic J PC 5 R. McKeown – Hadron Workhop - Beijing

6. 6 Proton Spin Puzzle 6 R. McKeown – Hadron Workhop - Beijing DIS →  0.25 RHIC + DIS →  g« 1 → L q D. de Florian et al., PRL 101 (2008) 072001 [X. Ji, 1997]

7. 7 W p u (x,k T,r ) Wigner distributions d2kTd2kT PDFs f 1 u (x),.. h 1 u (x)‏ GPDs/IPDs d 2 k T dr z d3rd3r TMD PDFs f 1 u (x,k T ),.. h 1 u (x,k T )‏ 3D imaging 6D Dist. Form Factors G E (Q 2 ), G M (Q 2 )‏ d2rTd2rT dx & Fourier Transformation 1D

8. 8 PAC 12 GeV Science Categories The Hadron spectra as probes of QCD (GluEx and heavy baryon and meson spectroscopy) The transverse structure of the hadrons (Elastic and transition Form Factors) The longitudinal structure of the hadrons (Unpolarized and polarized parton distribution functions) The 3D structure of the hadrons (Generalized Parton Distributions and Transverse Momentum Distributions) Hadrons and cold nuclear matter (Medium modification of the nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy, few-body experiments) Low-energy tests of the Standard Model and Fundamental Symmetries (Møller, PVDIS, PRIMEX, …..)

9. 9 12 GeV Approved Experiments by Physics Topics TopicHall AHall BHall CHall DTotal The Hadron spectra as probes of QCD (rated) (GluEx and heavy baryon and meson spectroscopy) 1 1 The transverse struture of the hadrons (rated) (Elastic and transition Form Factors)422 8 The longitudinal structure of the hadrons (rated) (Unpolarized and polarized parton distribution functions)124 7 The 3D structure of the hadrons (unrated) (Generalized Parton Distributions and Transverse Momentum Distributions)272 11 Hadrons and cold nuclear matter (rated) (Medium modification of the nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy, few-body experiments)124 7 Low-energy tests of the Standard Model and Fundamental Symmetries (to be rated at PAC 37)2 1 3 TOTAL101312237

10. 10 12 GeV Approved Experiments by PAC Days TopicHall AHall BHall CHall DTotal The Hadron spectra as probes of QCD (rated) (GluEx and heavy baryon and meson spectroscopy) 120 The transverse structure of the hadrons (rated) (Elastic and transition Form Factors)14470118 332 The longitudinal structure of the hadrons (rated) (Unpolarized and polarized parton distribution functions)23120118 261 The 3D structure of the hadrons (unrated) (Generalized Parton Distributions and Transverse Momentum Distributions)(190)(801)(80) 1071 Hadrons and cold nuclear matter (rated) (Medium modification of the nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy, few-body experiments)5100102 207 Low-energy tests of the Standard Model and Fundamental Symmetries (to be rated at PAC 37)(592) (88) 680 TOTAL95410914182082671

11. 11 Super Bigbite Spectrometer (SBS) in Hall A Scattering chamber Vacuum snout Magnetic shield First tracker Second tracker Hadron calorimeter Beam line Pb shield 48D48 magnet Third tracker CH2 analyzer Beam 11 MIE Funding schedule under discussion with DOE

12. 12 SBS: Extension G E n to High Q 2 The dramatic turnover of the Argonne DSE model would be clearly visible. If the turnover is seen, it would provide strong evidence for the importance of diquark degrees of freedom in the nucleon form factors. 12

13. 13 Møller & Deep Inelastic Scattering Parity Violation SoLID: general purpose deep inelastic parity violating experiment with solenoid Chinese contribution Dedicated Møller Experiment (successor to SLAC E158) DOE MIE proposal → CD0

14. 14 Future PV Program 14

15. 15 PAMELA Data on Cosmic Radiation Va. Tech. Physics Colloquium, Dec. 3, 2010 15 Surprising rise in e + fraction But not p Could indicate low mass A’ (M A’ < 1 GeV ) Or local astrophysical origin??

16. 16 New Opportunity: Search for A’ at JLab Search for new forces mediated by ~100 MeV vector boson A’ with weak coupling to electrons: Irrespective of astrophysical anomalies: New ~GeV–scale force carriers are important category of physics beyond the SM Fixed-target experiments @JLab (FEL + CEBAF) have unique capability to explore this! g – 2 preferred! 16Va. Tech. Physics Colloquium, Dec. 3, 2010

17. 17 A Short “White Paper” → NP2010 panel → IHEP, potential new collaborators

18. 18 12 GeV Upgrade Schedule

19. 19 Major Procurements (> $500K) nearly complete: –cryomodule cavities –beam transport magnets –cryogenics coldbox –vacuum valves –cold tuner –etc. etc. etc. ACCELERATOR CONSTRUCTION Beam Transport Quadrupole Magnets (114 - total order - on site) Cryomodule Cavities (12 of 80 ordered on site) 4-meter Dipole Magnets (23 of 37 ordered on site)

20. 20 12 GeV Upgrade – Cryomodule Cavity String January 4, 2011

21. 21 Physics Equipment Construction 21

22. 22 Physics Equipment Construction 22

23. 23 Hall D Status – Dec. 2010 23 Ready For Equipment (RFE) Dec. 28, 2010

24. 24 12 GeV Outlook Physics program is taking shape “Beyond Standard Model” program is growing - Parity violation - New gauge boson searches Construction Project is on track New equipment requirements (Hall A) - Super Bigbite Spectrometer - SOLID - MOLLER