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The J-PARC Facility and Ideas for TMD Measurements

The J-PARC Facility and Ideas for TMD Measurements. ECT* Workshop June 15, 2007 Yuji Goto (RIKEN/RBRC). 295 km. JAEA. Tokai. 1 hour. Tsukuba. J-PARC at Tokai. Hadron Beam Facility. Materials and Life Science Experimental Facility. Nuclear Transmutation. 500 m. Neutrino to Kamiokande.

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The J-PARC Facility and Ideas for TMD Measurements

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  1. The J-PARC Facility and Ideas for TMD Measurements ECT* Workshop June 15, 2007 Yuji Goto (RIKEN/RBRC)

  2. 295 km JAEA Tokai 1 hour Tsukuba J-PARC at Tokai ECT* Workshop

  3. Hadron Beam Facility Materials and Life Science Experimental Facility Nuclear Transmutation 500 m Neutrino to Kamiokande 3 GeV Synchrotron (25 Hz, 1MW) 50 GeV Synchrotron (0.75 MW) Linac (330m) J-PARC = Japan Proton Accelerator Research Complex J-PARC facility Joint Project between KEK and JAEA ECT* Workshop

  4. J-PARC facility • The budget for about 2/3 of the entire project has been approved by the Japanese government from JFY2001 as phase 1 • Phase 1 consists of major accelerator components and a part of experimental facilities ECT* Workshop

  5. J-PARC parameters • 50 GeV beam • repetition 3.4 ~ 5 (or 6) sec • flat top width 0.7 ~ 2 (or 3) sec • linac energy 400 MeV • 3.31014 ppp, 15 A • beam power 750 kW • 30 GeV beam (phase-1) • linac energy 180 MeV • 21014 ppp, 9 A • beam power 270 kW ECT* Workshop

  6. J-PARC schedule • June, 2007: Completion of civil construction of the Hadron Hall • December, 2007: Start of dry run of the main-ring synchrotron • May, 2008: Start of beam commissioning of the main-ring synchrotron • December 2008: Acceleration to 30 GeV and the first beam to the Hadron Hall first beam for the nuclear -particle experiments in JFY2008 first beam for the neutrino experiments in JFY2009 ECT* Workshop

  7. ＬＩＮＡＣ RCS n ＭＬＳＦ 50GeV-PS Hd Bird’s eye photo in Nov. 2006 ECT* Workshop

  8. Experimental Area Test Beam A-Line Beam Dump (on the guide rail for Phase 2) Hadron experimental hall (phase 1) beamlines for secondary beam experiments at the beginning of the phase1 area for primary beam experiments ECT* Workshop

  9. Dimuon experiment at J-PARC • Proposal and collaborators ECT* Workshop

  10. ECT* Workshop

  11. Dimuon experiment at J-PARC • Drell-Yan • the simplest process in hadron-hadron reactions • no final-state effect • no polarized Drell-Yan experiment done yet • rich programs • unpolarized and polarized program • flavor asymmetry of the sea-quark distribution • orbital angular momentum in the nucleon • transversity, etc. DIS Drell-Yan ECT* Workshop

  12. Dimuon experiment • Fermilab E866 experiment • flavor asymmetry of the seq quark distribution ECT* Workshop

  13. Dimuon experiment • Fermilab E906 experiment • similar experiment of E866 at lower energy 120 GeV with Tevatron main injector to cover higher-x region • construction 2007 – 2008 (or 2009) – not yet started • beam time 2009 – 2010 (or 2010 – 2011) • apparatus • partially to be used at J-PARC ECT* Workshop

  14. Dimuon experiment at J-PARC • Possible layout of the hadron hall ECT* Workshop

  15. Dimuon experiment at J-PARC • Unpolarized program • proton beam on proton and deuterium target ECT* Workshop

  16. GS-C GS-A GRSV chiral quark soliton model prediction Spin physics at J-PARC • Polarized Drell-Yan • ALL measurement • flavor asymmetry of sea-quark polarization 120-day run 75% polarization for a 51011 protons/spill polarized solid NH3 target, 75% hydrogen polarization and 0.15 dilution factor ECT* Workshop

  17. Spin physics at J-PARC • G will be made clear by RHIC and pol-DIS experiments soon… • Orbital angular momentum in the nucleon • in hadron-hadron reaction, no direct connection between measurement and theory (yet) • but, any partonic transverse motion and correlation should be related • Sivers effect • higher-twist effect • ALL measurement may also sensitive at high-xF… • Feng Yuan’s calculation with Lz= 1 component… [Harut Avakian, Feng Yuan, et al. arXiv:0705.1553.] ECT* Workshop

  18. Polarized Drell-Yan • AN measurement • Ji, Qiu, Vogelsang, and Yuan • PRD 73, 094017 (2006) • sensitive to higher-twist effect at high qT~ Q • Sivers effect and higher-twist effect provide the same description of SSA on Drell-Yan at moderate qT: QCD << qT << Q • similar for SSA on semi-inclusive DIS: hep-ph/0604128 • Sivers function in Drell-Yan is expected to have a sign opposite to that in DIS ECT* Workshop

  19. 4 < M+- < 5 GeV integrated over qT Polarized Drell-Yan • AN measurement Theory calculation by Ji, Qiu, Vogelsang and Yuan based on Sivers function fit of HERMES data (Vogelsang and Yuan: PRD 72, 054028 (2005)) • 1000 fb-1 (120-day run), 75% polarization, no dilution factor ECT* Workshop

  20. Polarized (and unpol.) Drell-Yan • ATT measurement • transversity • Boer-Mulders function by unpol. Drell-Yan • angular distribution of unpolarized Drell-Yan • correlation between transverse quark spinand quark transverse momentum ECT* Workshop

  21. Polarized (and unpol.) Drell-Yan • Boer-Mulders function by unpol. Drell-Yan • Lam-Tung relation • reflect the spin-1/2 nature of quarks • violation of the Lam-Tung relation suggests non-perturbative origin With Boer-Mulders function h1┴: ν(π-Wµ+µ-X)~valence h1┴(π)*valence h1┴(p) ν(pdµ+µ-X)~valence h1┴(p)*sea h1┴(p) L.Y. Zhu,J.C. Peng, P. Reimer et al., hep-ex/0609005 ECT* Workshop

  22. First 30% snake Second 30% snake Towards the goal • 30 GeV  50 GeV • unpolarized  polarized target  polarized beam • polarized beam study by BNL & KEK groups • possible locations of partial snakes in MR ECT* Workshop

  23. J/ Physics at 30 GeV • J/ • gluon fusion or quark-pair annihilation • quark-pair annihilation dominant • must be confirmed experimentally… • similar physics topics as Drell-Yan process calculations by color-evaporation model  eq ECT* Workshop

  24. Physics at 30 GeV J-PARC: Elab = 50 GeV • SSA measurement of open charm production • no single-spin transfer to the final state • sensitive to initial state effect: Sivers effect • collider energies: gluon-fusion dominant • sensitive to gluon Sivers effect • fixed-target energies: quark-pair annihilation dominant • sinsitive to quark Sivers effect RHIC: s = 200 GeV M. Anselmino, U. D’Alesio, F. Murgia, et al. ECT* Workshop

  25. Summary • J-PARC will start operation at 30 GeV for hadron-hall users in JFY 2008 • Possible high-momentum beam-line for primary beam users in JFY 2011 • Proposal of the dimuon experiment has been submitted to the J-PARC PAC • deferred at the 1st J-PARC PAC, June 30 – July 2, 2006 • to be resubmitted for the 3rd J-PARC PAC, July 6 – 7, 2007 to get a stage-1 approval (scientific approval) • It has rich unpolarized and polarized programs • flavor asymmetry of the sea-quark distribution • orbital angular momentum in the nucleon • transversity, etc. • J/ and charm physics with 30 GeV beam • Your participation and collaboration, suggestions of measurements and theoretical calculations are very welcome ECT* Workshop

  26. Backup Slides

  27. Number of Users: about 600 (about 1/3 from Japan) J-PARC facility September, 2005 Hadron Experimental Facility ECT* Workshop

  28. Experimental Area Test Beam A-Line Beam Dump (on the guide rail for Phase 2) Hadron experimental hall (phase 1) beamlines for secondary beam experiments at the beginning of the phase1 area for primary beam experiments ECT* Workshop

  29. Dimuon experiment • Fermilab E866/NuSea • closed geometry Fermilab Elab = 800 GeV 2×1012 protons / 20 sec ECT* Workshop

  30. based on the Fermilab spectrometer for 800 GeV, the length can be reduced but the aperture has to be increased two vertically bending magnets with pT kick of 2.47 GeV/c and 0.5 GeV/c tracking is provided by three stations of MWPC and drift chambers muon id and tracking are provided 2x1012 50 GeV protons/spill Experimental apparatus tapered copper beam dump and Cu/C absorbers placed within the first magnet ECT* Workshop

  31. Simulation studies • Expected Drell-Yan counts for a two-month p+d run at 50 GeV • 2x1012 protons/spill • 50-cm long liquid deuterium target • assume 50 percent overall efficiency ECT* Workshop

  32. D-meson • silicon detectors to identify second decay vertex • yield study • 109 proton/sec beam • 10% target • 2×1033 cm-2sec-1 • × 1 week = 103 pb-1 • acceptance 0.05 – 0.3 to cover forward/mid-rapidity/backward pT D0 yield pT > 1.5 GeV/c 5.5×106D0 for 103 pb-1 1.5 GeV/c -1 xF 1 -1 xF 1 ECT* Workshop

  33. pC CNI Polarimeter Extracted Beam Polarimeter Pol. H- Source Rf Dipole 180/400 MeV Polarimeter 25-30% Helical Partial Siberian Snakes Polarized proton acceleration at J-PARC • 50 GeV polarized protons for slow extracted beam primary fixed target experiments • low intensity (~ 1012 ppp), low emittance (10  mm mrad) beams Thomas Roser (BNL), et al. ECT* Workshop

  34. emittance: 10 mm-mrad, 95% • repetition rate 25Hz • sinusoidal ramping • kinetic energy: 180MeV – 3GeV • intrinsic resonance strength for a particle at an emittance of 10 mm-mrad =6.18x10-5 Full spin flip by a rf dipole Fast tune jump? =6.60x10-5 =7.63x10-5 =2.33x10-5 Polarized proton acceleration at J-PARC • Intrinsic resonances in RCS Mei Bai (BNL) ECT* Workshop

  35. Polarized proton acceleration at J-PARC • Spin tracking in 50 GeV MR average of 12 particles on an ellipse of 4 mm-mrad Alfredo Luccio (BNL) ECT* Workshop

  36. Polarized target • Michigan polarized target • existing at KEK • target thickness ~3 cm (1% target) • maybe operational with 1011 ppp (luminosity ~1034 cm-2s-1) ECT* Workshop

  37. Wohri and Lourenco 1 1 10 15 10 15 consistent at fixed-target region, too smaller yield (same result as Laurenco’s study) 0.1 0.1 Physics at 30 GeV • cross section • PYTHIA (6.228) study with PHENIX tune (<kT> = 1.5 GeV/c, Mc = 1.25 GeV/c2, K-factor = 3.5, Q2 = s) • J-PARC: 3-4 order smaller cross section than that at RHIC • can be compensated by higher intensity/luminosity at J-PARC… ECT* Workshop

  38. Electron-pair experiment • E16 experiment at J-PARC • search for nuclear-matter effect in  production • covering backward production of electron-positron pairs ECT* Workshop

  39. SSA measurements • Neutron • large asymmetry found at RHIC • production mechanism of neutron • one-pion exchange dominant – spin flip • figures for study in DIS exps. (HERA), please replace virtual photon with proton to apply them for pp reaction • asymmetry measurement • sensitive to interference between spin-flip term (one-pion exchange) and non-spinflip term (other reggeon exchanges) ECT* Workshop

  40. Y p AN(X) < 0, AN(Y) > 0 N*(D*)  n+X X AN(X) > 0, AN(Y)?? p n SSA measurements • neutron-tagged measurement • measure AN of coincident particles at BBC at PHENIX • forward neutron, forward BBC, left-right • (4.500.500.22)102 < 0 • forward neutron, backward BBC, left-right • (2.280.550.10)102 > 0 • asymmetry in the forward BBC has the same sign while backward particle has opposite sign AN initial-state effect - favored final-state effect ECT* Workshop

  41. SSA measurements • neutron-tagged measurement of Drell-Yan pair… • Jen-Chieh Peng’s calculation expecting sensitivity to the meson cloud model, and measurement of pion structure ECT* Workshop

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