PAC 46 Charge Robert Mc Keown PAC 46

PAC 46 Charge Robert Mc. Keown PAC 46 July 16, 2018

APPROVED EXPERIMENTS Hall A Hall B Hall C Hall D Oth er Tota l 0 3 1 3 0 7 6 4 3 1 0 14 The longitudinal structure of the hadrons 2 3 6 0 0 11 The 3 D structure of the hadrons 5 9 6 0 0 20 Hadrons and cold nuclear matter 8 4 7 0 1 20 Low-energy tests of the Standard Model and Fundamental Symmetries 3 1 0 1 1 6 Total 24 24 23 5 2 78 Total Experiments Completed 4. 6 2. 7 2. 1 0. 8 0 10. 2 Total Experiments Remaining 19. 4 21. 3 20. 9 4. 2 2. 0 67. 8 Topic The Hadron spectra as probes of QCD The transverse structure of the hadrons 2

Approved Experiments – PAC Days Topic The Hadron spectra as probes of QCD The transverse structure of the hadrons The longitudinal structure of the hadrons Hall A Hall B Hall C Hall D Othe Total r 0 319 11 540 0 870 150. 5 185 110 25 0 470. 5 65 230 165 0 0 460 The 3 D structure of the hadrons 409 872 197 0 0 1478 Hadrons and cold nuclear matter 220 230 205 0 14 669 Low-energy tests of the Standard Model and Fundamental Symmetries 547 180 0 79 60 866 Total Days 1392 2016 688 644 74 4813. 5 Total Days - Without So. LID 917. 5 2016 688 644 28 4294 1392 981 645 444 74 3536 917. 5 981 645 444 28 3016 138. 4 52 93 0 327. 9 3 779 929 44. 5 600. 5 351 28 2688 Total Approved Run Group Days (includes MIE) Total Approved Run Group Days (without So. LID) Total Days Completed Total Days Remaining

PAC 46 Charge: 2 returning C 2 5 new proposals 1 new run group (Hall D) 2 run group additions 5 LOI’s Review new proposals, previously conditionally approved proposals, and letters of intent for experiments that will utilize the 12 Ge. V upgrade of CEBAF and provide advice on their scientific merit, technical feasibility and resource requirements. Identify proposals with high-quality physics that, represent high quality physics within the range of scientific importance represented by the previously approved 12 Ge. V proposals and recommend for approval. Also provide a recommendation on scientific rating and beam time allocation for proposals newly recommended for approval. Identify other proposals with physics that have the potential for falling into this category pending clarification of scientific and/or technical issues and recommend for conditional approval. Provide comments on technical and scientific issues that should be addressed by the proponents prior to review at a future PAC.

CONDITIONAL APPROVAL Two types: C 1 – Approval pending technical review, no need to return to PAC C 2 – Approval pending further review by future PAC 5

PROPOSALS WITH PARALLEL RUNNING • Parallel running procedure - Intent is to encourage new proposals of “run groups” – Summary only of additions to existing run group (PAC to comment) 6

POLICY ON EQUIPMENT AVAILABILITY Categories for resource availability: – Stage I: resources need to be identified/obtained – Stage II: resources are essentially available This will be considered a Laboratory issue (not for PAC). 7

HIGH IMPACT For newly approved Stage II proposals, PAC should consider if any of these should be included in the “High Impact” category to receive priority for scheduling in the early (first 3 -5 years) running.

PAC REPORT Draft report text must be complete before closeout on Thursday. We will review all the draft text Thursday morning before the closeout. Susan Brown will assemble the draft text into a report for a final round of edits by email during 2 weeks following the PAC meeting.

ROLE OF USER CHAIR ON PAC • Monitor communications between PAC and spokespersons – identify issues. • Monitor PAC meeting proceedings for conflicts of interest. • Monitor PAC meeting proceedings to identify issues of fairness and ethical behavior. • Participate in all scientific discussions to provide additional expertise (except where there is a conflict of interest)

COMMUNICATION WITH PAC Communication with PAC members should be limited to: • Submission of proposal before the deadline • Presentation/discussion at PAC meeting, must be inperson (not remote connection) • Responses from spokespersons and/or contact person to inquiries from PAC for further information or clarification Note: TAC and Theory reports are not public documents – please do not distribute beyond your collaboration.

NEW PROPOSALS FOR PAC 46 001, 003, 004, 006 would be Stage II if approved 005 would be Stage I if approved

NEW RUN GROUP PROPOSALS This would be Stage I if approved

CONDITIONAL RETURNING FOR APPROVAL C 12 -17 -006 would be Stage II if approved C 12 -16 -001 would be Stage I if approved

PARALLEL RUNNING ADDITIONS These run in parallel with previously approved or conditionally approved proposals. So they are considered already approved (or conditional) and are presented by collaborations – the PAC will provide a written comment for each of these in the report.

LETTERS OF INTENT 50 Letters of intent will be given the same “rights” to their scientific ideas as are currently afforded to deferred experiments: LOI has established a claim to a physics measurement that lasts for the next two successive PAC meetings.

JEOPARDY Policy Finalized after discussion with UGBOD in September 2016 Rationale • Use normal yearly PAC for ~4 years to address all presently approved proposals that have not been scheduled, plus new proposals in the next few years. Estimate ~5 -10 proposals per meeting • Will start in 2019 to reach steady state in 2024 proposals that have been approved for 4 years or more but are not scheduled will be considered in Jeopardy. 17

2019 JEOPARDY (PROPOSED) PAC days 52 Hall C Title Measurement of the Charged Pion Form Factor to High Q 2 Contact Person G. Huber* E 12 -06 -104 C Measurement of the Ratio R=sigma. L/sigma. T in Semi-Inclusive Deep-Inelastic Scattering R. Ent* 40 A- E 12 -06 -105 C Inclusive Scattering from Nuclei at $x > 1$ in the quasielastic and deeply inelastic regimes D. Day* 32 A- Could be on schedule Fall 2020 No (Hi impact) E 12 -06 -107 C The Search for Color Transparency at 12 Ge. V D. Dutta* 26 B+ 31% completed, 18 days remaining Yes E 12 -06 -110 C Measurement of Neutron Spin Asymmetry A 1 n in the Valence Quark Region Using an 11 Ge. V Beam and a Polarized 3 He Target in Hall C X. Zheng* 36 A On schedule for Fall 2019 No E 12 -06 -114 A Measurements of Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 Ge. V C. Hyde* 100 A 50% completed, 50 days remaining Yes (70 days are Hi Impact) E 12 -06 -121 C A Path to 'Color Polarizabilities' in the Neutron: A Precision Measurement of the Neutron $g_2$ and $d_2$ at High $Q^2$ in Hall C B. Sawatzky* 29 A- E 12 -06 -122 A Measurement of neutron asymmetry A 1 n in the valence quark region using 8. 8 Ge. V and 6. 6 Ge. V beam energies and Bigbite spectrometer in Hall A B. Wojtsekhowski* 23 A- E 12 -07 -105 C Scaling Study of the L-T Separated Pion Electroproduction Cross Section at 11 Ge. V T. Horn* 36 A- E 12 -07 -109 A Large Acceptance Proton Form Factor Ratio Measurements at 13 and 15 (Ge. V/c)2 Using REcoil Polarization Method B. Wojtsekhowski* 45 A- 18 Rating A 2019 Jeopardy Status Proposal E 12 -06 -101 Could be on schedule Fall 2020 (with E 12 -07 -105) No (Hi impact) Yes Not on schedule yet, may run adjacent to E 12 -06 -110 in Spring 2020 No? Yes Could be on schedule Fall 2020 (with E 12 -06 -101) No? No (Hi impact)