1. Hall A Status Hall A Collaboration Meeting Dec 15, 2011 Robert Michaels Acting Hall A Leader Recent Activity Future Projects Scheduling Process Publications Borrel: Thursday at 6 pm in A110  give $9 to either me, Stephanie, or Doug

2. Recent Activity in Hall A (2011) May 13 Finished a series of experiments, started 6 mo. shutdown, install g2p/GEp August PAC38 -- 4 new proposals, SBS SIDIS approved, 3 proposals graded (  next slide) Oct 13-14 Review of SuperBigbite Spectrometer (SBS) by DOE favorable on science and technology. needed work on project management, cost, schedule. revised proj. mgt. plan (PMP) -- John LeRose -- due Jan. Oct – now g2p /GEp polarized target: Failure of superconducting magnet (shorts to ground). Decide : retrofit a magnet from Hall B, ready Feb 2012 Plan: reduced run of g2p/GEp Feb – May 2012 covering essential low-Q2 run plan. + 1 wk. commissioning run (w/o target) Dec (starting now).

3. PAC38 Results : Hall A NUMBERCONTACT PERSON TITLEDAYS REQUESTED DAYS AWARDED SCIENTIFIC RATE PAC DECISION PR12-11-101R. Michaels PREX-II Precision Parity-Violating Measurement of the Neutron Skin of Lead 35 A Approved PR12-11-108 H. Gao SOLID-H(T) Target Single Spin Asym in SIDIS (e,e'π ± ) on a Transversely Polarized Proton Target 120 C2 (target design) PR12-11-104 I. PomerantzHard Photodisintegration of 3 He into pp and pn pairs 10 Reject PR12-11-112P. Solvignon. Precision measurement of the isospin dependence in the 2N and 3N short range correlation region 19 A-Approved C 12-09-018 B. Wojtsekhowski Measurement of Semi-Inclusive Pion and Kaon electroproduction in the DIS Regime on a Transversely Polarized 3He Target using the Super BigBite and BigBite Spectrometers in Hall A 64 A-Approved E12-06-114C. Hyde Measurement of Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 GeV 100 A Grade, time E12-10-006H. Gao. SOLID-He3(T) An update to PR12-09-014: Target Single Spin Asymmetry in Semi-Inclusive Deep- Inelastic Electro Pion Production on a Transversely Polarized 3He Target at 8.8 and 11 GeV 90 A Grade, time E12-11-007J. Huang. SOLID-He3(L) Asymmetries in Semi-Inclusive Deep- Inelastic Electro-Production of Charged Pion on a Longitudinally Polarized He-3 Target at 8.8 and 11 GeV 35 A Grade, time New proposals Returning proposals -- was Conditional (C) or up for a grading Aug 2011

4. Uva/Jlab Polarized NH 3 Target Low Q 2 g p 2 and G E p Experiments (6 GeV) Scheduled Feb - May 2012 pending target repairs test run Dec 13 – 22 Modified Beamline in Hall A 0.02 < Q 2 < 0.40 GeV 2 Jian-Ping Chen A. Camsonne K. Slifer D. Crabb R. Gilman G. Ron D. Day A. Sarty J. Arrington Chicane Magnets Septum Low-current Monitors Local Beam dump Slow Raster

5. Schedule : Hall A 2011 2012 2017 g2p/GEp 12 mo. Shutdown Early 12 GeV Experiments 12 GeV Commissioning SuperBigbite MOLLER SOLID Physics Beam to Hall A Thomas Jefferson National Accelerator Facility 20132014 201520162017 2018 2019 2020 2021 calendar year 12 GeV Planning Committee Ron Gilman (chair), Javier Gomez Douglas Higinbotham, Charles Hyde Nilanga Liyanage, Kent Paschke SuperBigbite MOLLER

6. Have not produced a publication -- exceed the avg time (31 months) to the first: E97-110 forward GDH (Vince Sulkosky -- working on a draft) E05-004 A(Q) (Ron Gilman) E04-018 3,4He elastic (Makis Petratos ) E97-111 4He(e,e'p) (Doug Higinbotham) E00-102 16O(e,e'p) (Kevin Fissum) E06-007 208Pb(e.e'p) (Konrad Aniol) E05-110 CSR (Jian-Ping Chen) Overdue archival publications GDH (Karl Slifer, Zein-Eddine Meziani), HAPPEX-II (Bob Michaels, David Armstrong) 3He(e,e'p) (Fatiha Benmokhtar) A,B(Q2) (Makis Petratos) Comments on archival publications They are a history of what we did, with sufficient detail to reproduce the results. 12 Month Shutdown: you have more time to write. They help your grant ! Reminder About Overdue Publications

7. Hall A Publications in 2011 S. Abrahamyan, et.al. Search for new gauge boson in the A‘ Expt (APEX). Phys. Rev. Lett 107:191804, 2011 J. Huang, et.al. Beam-Target Double Spin Asymmetry A_LT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized He-3 Target at 1.4 < Q 2 <2.7 GeV 2. arXiv:1108.0489 [nucl-ex] K. Paschke, et.al. New Precision Limit on the Strange Vector Form Factors of the Proton. arXiv:1107.0913 [nucl-ex] X. Qian, et.al., Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized 3 He Target. Phys.Rev.Lett.107:072003,2011 G. Ron et al. Low Q 2 measurements of the proton form factor ratio $mu_p G_E / G_M$. arXiv:1103.5784 [nucl-ex] A.J.R. Puckett, et.al., Reanalysis of Proton Form Factor Ratio Data at Q 2 = 4.0, 4.8, and 5.6 GeV 2 arXiv:1102.5737 [nucl-ex] S. P. Malace, et.al. A precise extraction of the induced polarization in the 4 He(e,e'p) 3 H reaction Phys.Rev.Lett.106:052501,2011 E. Fuchey, et.al., Exclusive Neutral Pion Electroproduction in the Deeply Virtual Regime Phys.Rev.C83:025201,2011 J. Glister, et.al. Polarization Obs in Deuteron Photodisintegration below 360 MeV Phys.Lett.B697:194-198,2011. G.D. Cates, et.al., Flavor decomposition of elastic nucleon E&M form factors Phys.Rev.Lett.106:252003,2011 X. Zhan et al. Proton Elastic FF Ratio at low Q 2 Phys. Lett. B705 59 (2011) M. Friend, et.al.. Upgraded photon detector with integrating readout arXiv::1108:3115 [nucl-ex] S. Ban et.al.. Parity Violating Electron Scattering Measurements of Neutron Densities J. Phys. G39 014104, 2012 L. B. Weinsten, et.al., Short Range Correlations and the EMC Effect Phys. Rev. Lett. 106: 052301, 2011 J. Arrington et al. Short-Range Nucleon-Nucleon Correlations arXiv:1104.1196 [nucl-ex] M. Meziane et al. Effects Beyond Born in Pol. Transf. Obs. ep Elastic Phys. Rev. Lett 106. 132501, 2011 S. Abrahamyan, et.al. Neutron Radius of 208Pb (PREX) about to submit to PRL S. Abrahamyan, et.al. Transverse Asymmetries from H, 4 He, 12 C, and 208 Pb about to submit to PRL

8. Publications : ~18 this year. Timely publications and Archival Papers are important ! g2p / GEp is starting Bright future for the 12 GeV era See you at the Borrel (Thurs 6 pm in A110) Summary : Hall A Status R. Michaels Hall A Collab. Mtg. Dec 15, 2011