Update on Experiments using SoLID Spectrometer Yi Qiang for SoLID Collaboration Hall A Collaboration Meeting Dec 16, 2011

2 Overview  SoLID: Solenoidal Large Intensity Device  High rate capability: allow for high luminosity  Full 2π azimuthal angular acceptance  Three experiments approved  PVDIS: E  SIDIS of polarized 3 He: E and E  All rated “A” by PAC  Conditionally approved  SIDIS using proton target: PR  Instrumentation Update  see Zhiwen Zhao’s talk 12/16/2011 SoLID Update

3 SoLID Spectrometer 12/16/2011 SoLID Update PVDISSIDIS Can you find six differences between these panels? Target Location, Baffles (PVDIS), Cherenkov’s, GEM Layout, Extra E-Cal, Beam Pipe

4 PVDIS E Motivation 12/16/2011 SoLID Update Standard Model CSV at Quark Level Di-quarks in the nucleon (Q 2 Dependence) d/u for Hydrogen

5 PVDIS - Statistics vs. Kinematics  Strategy: ~0.5% precision over broad kinematic range for sensitive Standard Model test and detailed study of hadronic structure contributions 12/16/2011 SoLID Update 4 months at 11 GeV 2 months at 6.6 GeV Error bar σ A /A(%) shown at center of bins in Q 2, x Untangle physics with Approved beam time: 169 days

6 SIDIS - Motivation  TMDs provides 3-D momentum imaging of nucleons in addition to f 1 and g 1  A new phase of study, fast developing field  SIDIS: gold mine for all TMDs  Access all eight leading-twist TMDs through spin-comb. & azimuthal-modulations 12/16/2011 SoLID Update TMD Nucleon Spin QCD Dynami cs Quark OAM / Spin QCD Factoriz ation 3-D Tomogr aphy Lattice QCD Models in DIS Nucleon -> Plate Transverse motion preserved Transverse motion preserved

7 SIDIS E  Measurement of SSA in SIDIS with SoLID on a transversely polarized 3 He  <10% d quark tensor charge (Collins moments)  Fundamental property of nucleon benchmark test of Lattice QCD  4-D (x,Q 2,z,PT) mapping of Sivers moments  Orbital Angular Momentum (OAM): Im[(L=0) q ×(L=1) q ]  Search for sign change in Sivers function vs. Drell-Yan  Aim for first non-zero Pretzelosity Moments  Direct Probe of relativistic effect and OAM within models  SIDIS using SoLID and 3 He  Large acceptance and high Luminosity  Complete 2π coverage: better angular separation  3 He target: > 60% polarization, L(n) ≈ cm -2 s -1  Measuring cross section ratios on p, d, 3 He  Study factorization, PT dependence, and FSI 12/16/2011 SoLID Update Collins Effect Sivers Effect

8 SIDIS E  SIDIS using Longitudinally Pol. 3He and SoLID  Extraction of novel TMDs   Many predictions available  First Lattice QCD calculation  Light-cone quark model and others  No GPD Correspondence  Sign of intrinsic transverse motion  Links to Collinear PDFs 12/16/2011 SoLID Update p T dependent helicity distribution WORM-GEAR distributions, interference of OAMs: Re[(L=0) q ×(L=1) q ] Light-Cone CQM, arXiv: h 1L ⊥ (1) S-P int. P-D int. Lattice QCD, arXiv:

9 Example projections of Neutron Collins moments, 1 of 48 z-Q 2 panels, over 1000 bins for each asymmetry. Expected Improvement of Sivers Function From A. Prokudin E : 90 days E : 35 days Ultimate Precision 4-D Mapping

10 SIDIS PR  SIDIS Using SoLID and a Transversely Polarized Proton Target  Perfect complementary experiment to 3 He SoLID SIDIS experiments: same coverage, similar statistics  Conditionally approved on target  Beam line similar to g2p/gep configuration  JLab/UVa/SLAC polarized target, used in many different experiment (SANE, RSS etc..) o 3cm long NH 3 target o 5 Tesla superconducting magnet o Dynamic Nuclear Polarization(DNP) using microwave pumping o Target magnet optimized for longitudinal setting  Need new magnet with larger opening angle to cover entire phase space  Spin-flip using Adiabatic Fast Passage (AFP) technique  Plans to improved packing fraction (using target disks instead of beads) 12/16/2011 SoLID Update

11 Collaboration  International Collaboration: 8 countries, 50+ institutions  Rapid growth in US-China collaboration  Magnet/Support/Simulations (Argonne/Duke/UVa/Umass)  Tracking (UVa/Caltech/Tsinghua/USTC/CIAE/LanzhouU)  Gas Cherenkov(Temple/Duke/Stony Brook)  EM Calorimeter (UVa/Los Alamos/WM)  TOF with MRPC (Tsinghua/Duke)  DAQ and Trigger (Jlab/UMass)  Polarimetry (UVa)  Targets (Jlab/UVa)  Infrastructure (Jlab/Duke) 12/16/2011 SoLID Update

12 Progress/Plan  Design of all subsystems are all progressing well.  See Zhiwen’s talk for more hardware update.  Some hardware beam tests are scheduled.  New collaborators joined:  Stony Brook group: Cherenkov detector/GEM  William Mary group: Calorimeter  Regular collaboration meetings.  Physics division “brainstorming” meeting in Sep went well. Next one on Jan  Preparing for Jlab director’s review.  Informal contact with DOE. 12/16/2011 SoLID Update

BACKUP SLIDES 12/16/2011 SoLID Update

14 PVDIS Sensitivity - C1 and C2 Plots 12/16/2011 SoLID Update

15 Slide from A. Prokudin

16 SBS vs. SoLID  From A. Puckett

17 About <10% d quark Tensor Charge  Precision is not directly limited by statistical precision.  However,  Precision is essential to control systematic uncertainties (SIDIS factorization, P T dependence, Higher Twist Contribution …)  Based on current knowledge, expect to control systematic uncertainty down to 7-15%.  Need data to tell us the final number!  10% is a the goal for our data.

18 Tensor Charge Determination  For u and d quark, the covered x range is about (assuming a W>2.0 and W’>1.5 cut).  Contribution from is about 1% (u) and 4% (d) (Torino Group)  Contribution fom is about 1.5% (u) and 0.2% (d)  Quoting 3-4% in total for contribution in unmeasured region.

19  High luminosity: L(n) = cm -2 s -1  Polarization in all 3 directions (L, T, V)  Record high in-beam ~ 60% polarization  Fast spin flip (every 20 minutes) Performance of 3 He Target