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IWHSS_11 April 6 2011 A.Magnon

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  1. IWHSS’11 4-6 April 2011 PARIS 1 IWHSS_11 April 6 2011 A.Magnon

  2. Monday Morning • A.Bachetta • A.Martin • M.Burkardt • Z.E.Meziani 2 IWHSS_11 April 6 2011 A.Magnon

  3. 3 IWHSS_11 April 6 2011 A.Bachetta

  4. 4 IWHSS_11 April 6 2011 A.Bachetta

  5. 5 IWHSS_11 April 6 2011 A.Magnon

  6. 6 6 IWHSS_11 April 6 2011 A.Magnon IWHSS_11 April 6 2011 A.Bachetta

  7. 7 7 IWHSS_11 April 6 2011 A.Magnon IWHSS_11 April 6 2011 A.Bachetta

  8. 8 8 IWHSS_11 April 6 2011 A.Magnon IWHSS_11 April 6 2011 A.Bachetta

  9. Transverse Spin and Momentum Structure of the Nucleon a large international theoretical and experimental effort hard polarisedpp scattering RHIC / BNL M. Grosse-Perdekamp SIDIS off transversely polarised targets: DESY (HERMES) CERN (COMPASS) JLabZ.-E. Meziani and eRHIC, EIC, ENC and several (future) projects for (polarised) Drell-Yan: CERN (COMPASS) FNAL, JParc, RHIC, JINR, IHEP, GSI  J.-C. Peng, A. Ogawa, A. Ferrero 9 IWHSS_11 April 6 2011 A.Martin

  10. KINEMATICAL REGION 160 GeV 27.5 GeV JLab 6 GeV 10 IWHSS_11 April 6 2011 A.Martin

  11. Collins asymmetry - proton same sign and strength: a very important, not obvious result! h+ π+ indication for: not a higher twist effect, weak Q2 dependence of the Collins FF h- π- 11 COMPASS sign convention IWHSS_11 April 6 2011 A.Martin IWHSS’11

  12. h+ • same sign • COMPASS results in the overlap region smaller by a factor ~ 2 π+ Sivers asymmetry - proton good agreements π- h- 12 IWHSS_11 April 6 2011 A.Martin IWHSS’11

  13. E06‑010 JLAB Experiment to access the neutron Spokespeople: X. Jiang (Los Alamos), J.-P. Chen (JLab), H. Gao (Duke), J.C. Peng (UIUC), Students: XinQian (Duke), ChiranjibDutta (Kentucky), and KalyanAllada (Kentucky) Luminosity Monitor • Polarized 3He Target • Polarized Electron Beam • ~80% Polarization • Fast Flipping at 30Hz • PPMlevel charge Asymmetry controlled by online feed back • BigBite at 30º as Electron Arm • Pe = 0.7 ~ 2.2 GeV/c • HRSL at 16º as Hadron Arm • Ph = 2.35 GeV/c Beam Polarimetry (Møller + Compton) 13 IWHSS_11 April 6 2011 Z.E.Meziani

  14. Preliminary Neutron Collin/Sivers Asymmetries • Systematic uncertainty is still under study • Curves: Diquark-quark Model (Ma), Global Fit (Anselmino), Light-Cone quark model (Pasquini) Collins Sivers 14 IWHSS_11 April 6 2011 Z.E.Meziani

  15. TMDs program @ 12 GeV in Hall B E12-06-112:Pion SIDIS E12-09-008: KaonSIDIS U E12-07-107:Pion SIDIS E12-09-009: KaonSIDIS L T LOI12-06-108: Pion SIDIS LOI12-09-004: KaonSIDIS q N PAC approved experiments & LoI • Complete program of TMDs studies for pions and kaons • Kaon measurements crucial for a better understanding of the TMDs “kaon puzzle” • Kaon SIDIS program requires an upgrade of the CLAS12 detector PIDRICH detector to replace LTCC Project under development 15 Courtesy of H. Avakian IWHSS_11 April 6 2011 Z.E.Meziani

  16. 16 16 IWHSS_11 April 6 2011 M.Burkardt

  17. 17 17 IWHSS_11 April 6 2011 M.Burkardt

  18. 18 18 IWHSS_11 April 6 2011 M.Burkardt

  19. Monday Afternoon • D. De Florian • Ph. Haegler • M. Grosse Perdekamp • C. Franco 19 IWHSS_11 April 6 2011 A.Magnon

  20. 20 20 IWHSS_11 April 6 2011 A.Magnon

  21. 21 IWHSS_11 April 6 2011 D. De Florian

  22. 22 IWHSS_11 April 6 2011 D. De Florian

  23. 23 IWHSS_11 April 6 2011 D. De Florian

  24. Nucleon parton distributions from lattice QCD Philipp Hägler supported by

  25. Typical „measurements“ on the lattice Not quite as trivial as it might appear... 25 IWHSS_11 April 6 2011 Ph. Haegler

  26. Ju, Jd template figure (update) [JLab Hall A PRL`07; HERMES JHEP`08] lattice results from covariant BChPT extrapolations [Dorati, Gail, Hemmert NPA 2008] * LHPC arXiv:1001.3620 * LHPC PRD `08 0705.4295 * QCDSF (Ohtani et al.) 0710.1534 *,1 QCDSF/UKQCD preliminary Goloskokov&Kroll EPJC`09 0809.4126 Wakamatsu 0908.0972 DiFeJaKr EPJC `05 hep-ph/0408173 (Myhrer&)Thomas PRL`08 0803.2775 1Sternbeck, Pleiter, Zanotti et al. 2011 * [non-singlet, connected only; add. uncertainties due to chiral extrapolations, renormalization] 26 IWHSS_11 April 6 2011 Ph. Haegler

  27. Sivers transverse momentum shift

  28. Spin Physics Results from RHIC M. Grosse-Perdekamp UIUC Preliminaries: Facility Status QCD & PDFs vs Data Gluon spin distribution Inclusive hadron and jet results QCD analysis Low x & x-dependence with di-jets and rapidity separated di-hadrons W-production in polarized p-p First results from pp  W  eν Transverse Spin Inclusive AN Channels isolating Collins or Sivers effects  Drell Yan measurements in Akio Owaga’stalk IWHSS_11 April 6 2011 M. Grosse-Perdekamp 28

  29. ΔG(x) from DSSV Global QCD Analysis 0.2 ΔGtrunc[0.05,0.2] = ∫ ΔG(x) dx = 0.005 0.05 +0.051 -0.058 -0.058 -0.058 -0.058 de Florian, Sassot, Stratmann, Vogelsang PRD 80:034030,2009 x ΔG(x) • ΔGtrunc[0.05,0.2] ≈ 0 since node at x≈0.1 • Data constrains only truncated first moment of ΔG(x) in x-interval [0.05,0.2], but not functional form at low or high x • ΔGtrunc in large-x region constrained to be small by requirement that ΔG(x) ≤ G(x); at Q2=10 GeV2: ΔGtrunc[0.3,1.0] ≤ 0.03 • At small x, ΔG(x) can differ from DSSV beyond errors without violating funda-mental constraints RHIC Range Small-x x≤0.05 Large-x x≥0.2 0.05<x<0.2 IWHSS_11 April 6 2011 M. Grosse-Perdekamp 29

  30. Projected ALL(π0) in MPC for different ΔG(x) at low x for ∫Ldt = 300 pb-1, √s = 500 GeV (RHIC W program, 2011 to 2015) Increasing Δgtrunc[10-4,0.05] ΔGtrunc= -.2 ΔGtrunc= -.1 ΔGtrunc= -.5 pT,1>3 GeV, pT,2 > 1.5 GeVerror bars are statistical only ΔGtrunc [10-4,0.05] = -0.1 will be observable IWHSS_11 April 6 2011 M. Grosse-Perdekamp 30

  31. Summary o Gluon Spin contribution constraint for 0.05 < x < 0.2 use di-jet and di-hadron measurements to probe x-dependence ΔG(x) and forward jet production to reach low x, x~0.001. o W-program has started with electrons (STAR & PHENIX) and muons (PHENIX). Luminosity accumulation will take 3-4 runs. o Precision data on AN are available. Exciting new Drell Yan experiment at IP2: AnDY (see Akio Ogawa’s talk). Initial measurements to isolate Collins -and Sivers- asymmetries. Much improvement from detector upgrades and increased statistics. IWHSS_11 April 6 2011 M. Grosse-Perdekamp 31

  32. 32

  33. IWHSS_11 April 6 2011 C. Franco 33

  34. IWHSS_11 April 6 2011 C. Franco 34

  35. IWHSS_11 April 6 2011 C. Franco 35

  36. Tuesday Morning • J. Friedrich • D. Drechsel • D. Bugg • G. Bali • A. Szczepaniak 36 IWHSS_11 April 6 2011 A.Magnon

  37. IWHSS_11 April 6 2011 J. Friedrich 37

  38. IWHSS_11 April 6 2011 J. Friedrich 38

  39. IWHSS_11 April 6 2011 J. Friedrich 39

  40. IWHSS_11 April 6 2011 J. Friedrich 40

  41. 41 IWHSS_11 April 6 2011 D. Drechsel

  42. 42 IWHSS_11 April 6 2011 D. Drechsel

  43. 43 IWHSS_11 April 6 2011 D. Drechsel

  44. Topics in meson spectroscopy for Compass David Bugg, Queen Mary, London (i) Look for the I=0 JPC=1-+ partner of p1(1600/1662) (ii) Measure s(4p)/s(2p) from 1200-2000 MeV for JP=0+,1-,2+. Sort out f0(1370), f2(1565) and r(1450). Check if f2(1810) exists or is really f0(1790). (iii) Check if p1(1405) is resonant or just a threshold cusp. IWHSS_11 April 6 2011 D. Bugg

  45. Topics in meson spectroscopy for Compass The p1(1600/1660) looks a good hybrid candidate. It ought to have an I=0 partner of similar mass. The only likely decay mode is to a1(1260)p: JPC = 1++ + 0-+ = 1-+. This is NOT easy because no angular dependence: there are only the r and a1 signals to go on, and the a1 is broad. However, other JPC will have angular dependence. There exist possible partners with JPC = 2-+: h2(1860) and p2(1880); also p(1800), 0-+ IWHSS_11 April 6 2011 D. Bugg

  46. Topics in meson spectroscopy for Compass CONCLUSION: There is still lots to do and learn in meson spectroscopy. I doubt that heavy meson spectroscopy can go beyond narrow states, but it is important to complete light meson spectroscopy and baryon spectroscopy and learn what we can about hybrids and glueballs. Good luck ! The spectroscopy of I=1, C = +1 states and C=-1 states with I=0 and 1 could be completed by measuring polarisation in pp -> 3p0, hhp, hp; wp and whp0; whand wp0p0 at the forthcoming Fair facility. It just needs an extracted p beam of 5 x 104 p/s. IWHSS_11 April 6 2011 D. Bugg

  47. 47 IWHSS_11 April 6 2011 G. Bali

  48. 48 IWHSS_11 April 6 2011 G. Bali

  49. 49 IWHSS_11 April 6 2011 A. Szczepaniak

  50. 50 IWHSS_11 April 6 2011 A. Szczepaniak