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Future studies of TMDs

Future studies of TMDs. Delia Hasch. SIR05- International Workshop on Semi-inclusive reactions and 3D-parton distributions May 18-20, 2005; Jefferson Lab, Newport News (USA). object. add k T dependent DF :. transversity. new class of FF more functions @twist-3 …

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Future studies of TMDs

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  1. Future studies of TMDs Delia Hasch SIR05- International Workshop on Semi-inclusive reactions and 3D-parton distributions May 18-20, 2005; Jefferson Lab, Newport News (USA)

  2. object add kT dependent DF : transversity • new class of FF • more functions @twist-3 … • manifest in azimuthal/SSA ___ Future TMD measurements _________________ SIR05 Workshop on TMDs and GPDs _______ Newport News (USA), 20-05-05

  3. left right pp e+e- sidis DFFF e+ e- observables DY, ATT incl. jets Collins FF IFF unpol FF AUT(f±fS) , ALT(f±fS) AUL(f), ALU(f) AUU(f), … L production, VM, … AN jet correlations, … ___ Future TMD measurements _________________ SIR05 Workshop on TMDs and GPDs _______ Newport News (USA), 20-05-05

  4. pp e+e- sidis future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary observables experiments @6GeV (very) far future PAX JLab@12GeV EIC

  5. left right with current data set till 2005 (Pb=0.5): • map kinematic dependencies xF, PT • hadron ID: p+/-/0, K+/-, p • new observables to disentangle different mechanism: RHIC: √s ~200 GeV future TMD pp sidis e+e- measurements RHICPAX HERMES COMPASS JLab EIC BELLE summary TMDs @RHIC contributions: • Collins effect • Sivers effect • higher twist Fermilab E704: √s ~20 GeV

  6. FMS silicon tracker AT with 32pb-1 future TMD pp sidis e+e- measurementsRHICPAX HERMES COMPASS JLab EIC BELLE summary TMDs @RHIC azimuthal back to back correlation between hadrons in opposite hemisphere jets:  clean channel for Sivers effect 1-30 pb-1 Pb = 0.5 • analysis of jet structure: • isolate Collins effect • 2hadron interference 30-100 pb-1 Pb ≥ 0.5 • DY, inclusive jets: • direct access to h1 0.1-10 fb-1 Pb ≥ 0.7

  7. future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLab EIC BELLE summary TMDs in SIDIS polarised lepton beam AUT, AUL, ALU, ALT ,… single/double hadron production L production, VM polarised target

  8. p0 , K+ on the way • data taking with transverse target till end 2005: ~0.8∙(2002-2004) statistics in 2005 • weighted asymmetries under study future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLab EIC BELLE summary TMDs @HERMES Collins + Sivers effects disentangled ! significant non-zero results

  9. future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLab EIC BELLE summary TMDs @HERMES significant non-zero result  add 2005 statistics, ALU on the way

  10. transversely polarised target: • AUT(f±fS)  1-hadron production •  exclusive: (f -fS) •  2-hadron production •  L polarisation • longitudinally polarised target/beam: • ALU(f), AUL(f)  1 or 2 hadron prod. • unpolarised:<cos2f>UU future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLab EIC BELLE summary TMDs @HERMES HERMES will run till mid 2007 • 2005: ~7-8M DIS p+ p- p0 K+ r0 p+  p p  • 2000 /2007 p+ p- p0 K+ • 2007 p+ p- p0 K+/-

  11. results from 2002 data (~1.6M DIS) + 2003  ~4∙(2002)  improved trigger for higher x, Q2  hadron ID with RHIC + 2004  ~2∙(2003) future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLab EIC BELLE summary TMDs @COMPASS

  12. future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLab EIC BELLE summary COMPASS: L, L polarisation 2002 statistics high potential for polarisation measurement

  13. transversely polarised target: • AUT(f±fS)  1-hadron production •  exclusive (f-fs) •  2-hadron production •  L polarisation • longitudinally polarised target/beam: • AUL(f), ALU(f)  1 or 2 hadron prod. • unpolarised:<cos2f>UU 3He – 4He dilution refrigerator (T~50mK) superconductive solenoid (2.5 T) dipole (0.5 T) 2006++ 180mrad present acceptance present acceptance 70mrad 70mrad two 60 cm long target-containers with opposite polarisation  proton target in 2006: 30 days NH3 future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLab EIC BELLE summary TMDs @COMPASS COMPASS is foreseen to run up to the end of the present mid-term plan of CERN (2010) • 2006 (>2008 ?) p+/-/0, K+/- on d,p  r0    2006 / (>2008 ?)  d/p target * new Compass magnet  2007/08 priority of hadron program  * no analyses yet …

  14. 424 PbWO4 ……..crystals IC CLAS+IC • high potential for running with transversely polarised target CLAS future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLabEIC BELLE summary TMDs @JLab (6 GeV) • longitudinal target/beam asymmetries from CLAS: AUL ALU PRELIMINARY p+

  15.  valence region • small z-range  limited f acceptance future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLabEIC BELLE summary TMD @JLab (6 GeV )  transverse target polarisation: projections for 24 days approved proposal @Hall-A with 3He  neutron p-

  16. transversely polarised target: • AUT(f±fS)  1-hadron production •  exclusive: (f -fS) •  2-hadron production •  L polarisation • longitudinally polarised target/beam: • AUL(f), ALU(f)  1 or 2 hadron prod. • unpolarised:<cos2f>UU JLab @12 GeV  talks by V. Burkert A. Lung future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLabEIC BELLE summary TMD @JLab (6 GeV ) • 2006++ p- (p+) on n target      2004 / 2005++  ||   !factorisation tests !

  17. fragmentation function  e+e- future TMD pp sidis e+e- measurementsRHIC PAX HERMES COMPASS JLab EIC BELLE summary fragmentation in sidis

  18. e+ q f2-p e+ q f f1 e+ e- e- e- future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary FFfrom e+e-

  19. e+ e- future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary FFfrom e+e- first estimate of Collins FF from DELPHI data : AC = 6 – 12 % • KEKB: L >400 fb-1 • jet production from light quarks • sufficiently high scale pQCD regime: • Q2 ~ 100 GeV2 • not too high energy • A scales lnQ2 • avoid Z-pole • √s ~ 10 GeV << MZ √s = 10.58 GeV (Y(4S)) off-resonant (60MeV below res.) 10%

  20. KEK: L~150 fb-1 per year 10% off-resonant • “unlimited” running: KEK  superKEK 2012++ • FF measurement will be dominated by systematic uncertainties e+ e- future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary FFfrom e+e- • add p0: favoured/unfavoured • extension to IFF straight forward Milestone!

  21. first extraction of TMDs feasible e+ e- future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary current facilities: near+mid term future • Collins/2hadron FF with high accuracy JLAB @6GeV far future JLab @12GeV PAX @GSI and a “dream”  EIC

  22. T=15 GeV (s=5.7 GeV) T=22 GeV (s=6.7 GeV) Anselmino et al. PLB 594,97 (2004) xF=x1-x2 future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary Drell Yan @GSI spin-transferfrom polarized electrons of the target to antiprotons RHIC: t=x1x2=M2/s~10-3  exploration of the sea quark ATT very small (~ 1 %) GSI:M2~10 GeV2, s~30-50 GeV2, t=x1x2=M2/s~0.2-0.3 exploration of valence quarks (h1q(x,Q2) large)

  23. future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary 1 yr of data taking Drell Yan @GSI experiment:  asymmetric collider: p = 15.0 GeV in HESR p = 3.5 GeV in CSR  internal polarised target with p = 22 GeV

  24.  higher centre of mass energies  specific geometry • angular separation between elm. probe and target fragments future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary dream: Electron Ion Collider

  25. future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary eRHIC @BNL polarised electron/positron beam facility to collide with the existing RHIC ions / polarised protons •  linac + eRing + RHIC • optional: linac + RHIC • 5-10 GeV polarised e+/e- • 20-250 GeV polarised p, • light ions luminosity ~ 1033cm-2s-1

  26. future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary ELIC @JLab one accelerating & one decelerating pass through CEBAF • 3-7 GeV polarised e- • 30-150 GeV polarised p, • light ions • luminosity ~8∙1034 cm-2s-1

  27. pp  AN for inclusive hadrons, di-jets  Sivers AT in jets:  Collins FF  IFF ATT inclusive jets, DY BRAHMS, PHENIX, STAR PAX SIDIS  AUT, AUL, ALU, ALT, AUU for single and double hadrons L production, VM COMPASS, HERMES, JLab@6GeV JLab@12GeV, EIC TMDs e+e-  CollinsFF , IFF BELLE factorisation universality future TMD pp sidis e+e- measurements RHIC PAX HERMES COMPASS JLab EIC BELLE summary Summary

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