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The HypHI project at GSI Hypernuclear spectroscopy with heavy ion beams

The HypHI project at GSI Hypernuclear spectroscopy with heavy ion beams. Take R. Saito, for the HypHI collaboration GSI-Darmstadt Helmholtz Center for Heavy Ion Reserach and Johannes Gutenberg-Universität Mainz. How much can we extend this landscape?. L -hypernuclear chart.

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The HypHI project at GSI Hypernuclear spectroscopy with heavy ion beams

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  1. The HypHI project at GSIHypernuclear spectroscopy with heavy ion beams Take R. Saito, for the HypHI collaboration GSI-Darmstadt Helmholtz Center for Heavy Ion Reserach and Johannes Gutenberg-Universität Mainz

  2. How much can we extend this landscape? L-hypernuclear chart • Around the b-stability line • (p+,K+), (K-,p-), (e,e’K+) • BNL, KEK, J-PARC, CEBAF, FINUDA, MAMI C • Neutron rich hypernuclei • (K-,p+) • J-PARC, FINUDA • Toward hypernuclei at necleon drip-lines: Hypernuclei at extreme isospins • Heavy ion collision • JINR, HypHI The HypHI project, T.R. Saito, HYP2006 Mainz

  3. Heavy Ion Beams: Powerful Tools for Hypernuclear Spectroscopy Relativistic hypernuclei: projectile fragment → hypernuclei The HypHI project, T.R. Saito, HYP2006 Mainz

  4. How much can we extend this landscape? L-hypernuclear chart • Around the b-stability line • (p+,K+), (K-,p-), (e,e’K+) • BNL, KEK, J-PARC, CEBAF, FINUDA, MAMI C • Neutron rich hypernuclei • (K-,p+) • J-PARC, FINUDA • Toward hypernuclei at necleon drip-lines: Hypernuclei at extreme isospins • Heavy ion collision • JINR, HypHI The HypHI project, T.R. Saito, HYP2006 Mainz

  5. Hypernuclear magnetic moments • With meson and electron beam induced hypernuclear production • Very small recoil momentum of produced hypernuclei • Almost impossible to perform direct measurements of hypernuclear magnetic moments • B(M1) measurements with g-ray spectroscopy • Hyperball-J at J-PARC • Contributions from nuclear collective motion have to be subtracted • With heavy ion collisions • Hypernuclei at projectile rapidity → relativistic hypernuclei • Hypernuclei can be separated by a magnetic spectrometer • Precession of hypernuclear spin alignment in magnetic field • Perturbed p- asymmetry → magnetic moments • Can be performed only at FAIR in near future The HypHI project, T.R. Saito, HYP2006 Mainz

  6. Hypernuclear spectroscopy with heavy ion beams at GSI/FAIR LOI: submitted to the GSI PAC in March 2005 Approved by Helmholtz Association as Helmholtz-University Young Investigators group at GSI with Mainz University A proposal of the Phase 0 experiment Submitted to the GSI PAC To be discussed on October 23rd Giessen University, Germany GSI (DVEE, KP2, KP3), Germany JINR, Dubna, Russia Johannes Gutenberg University Mainz, Germany KEK, Japan Moscow State University, Russia Nara Women’s University, Japan Niels Bohr Institute, Denmark Osaka Electro-Communication University, Japan Osaka University, Japan Peking University, China RIKEN, Japan Soltan Institute for Nuclear Studies, Poland Tokyo University, Japan Tokyo University of Science, Japan Tohoku University, Japan TRIUMF, Canada Still expanding …… Spokesperson : Take R. Saito, GSI The HypHI project The HypHI project, T.R. Saito, HYP2006 Mainz

  7. Hypernuclei with Heavy Ion Beams: The HypHI project • Heavy ion induced reaction at relativistic energies (heavy-ion collision) • NN -> LKN : Energy threshold ~ 1.6 GeV • Heavy ion beams with E > 1.6 GeV/u needed • Stable heavy ion beam at GSI • Stable heavy ion beam at FAIR • RI-beam from FRS and super-FRS • Large Lorentz factor g (>3) • Effective lifetime : Longer by the Lorentz factor 200 ps -> 600 ps with g=3 200 ps -> 4 ns with g=20 • Only a few light hypernuclei so far identified with heavy ion beams at Dubna (3LH and 4LH, ~ 0.2 mb, with 4He and 7Li beams) L The HypHI project, T.R. Saito, HYP2006 Mainz

  8. Heavy Ion Beams: Powerful Tools for Hypernuclear Spectroscopy FRS Super-FRS E > 1.7 A GeV I > 105/s The HypHI project, T.R. Saito, HYP2006 Mainz

  9. Hypernuclei with Heavy Ion Beams: The HypHI project • Heavy ion induced reaction at relativistic energies (heavy-ion collision) • NN -> LKN : Energy threshold ~ 1.6 GeV • Heavy ion beams with E > 1.6 GeV/u needed • Stable heavy ion beam at GSI • Stable heavy ion beam at FAIR • RI-beam from FRS and super-FRS • Large Lorentz factor g (>3) • Effective lifetime : Longer by the Lorentz factor 200 ps -> 600 ps with g=3 200 ps -> 4 ns with g=20 • Only a few light hypernuclei so far identified with heavy ion beams at Dubna (3LH and 4LH, ~ 0.2 mb, with 4He and 7Li beams) L The HypHI project, T.R. Saito, HYP2006 Mainz

  10. HypHI at GSI/FAIR: Concept of Experiments • Produced hypernucleus at the similar velocity of projectiles • Large Lorents factor g > 3 • 200ps -> 600ps (g=3), hypernuclear decay in flight Example : 12C + 12C -> ALZ + K+,0 + X • Mesonic weak decay • L -> p- + p • Non-mesonic weak-decay • Lp -> np Magnet n target L-Hypernucleus K Residues Scintillators + diamond Trackers N-detector K+ counter p, p The HypHI project, T.R. Saito, HYP2006 Mainz

  11. Goals of the HypHI project • Hypernuclear magnetic moments • Quark bulding blockes • Quark Pauli blocking effect • L/S coupling as functions of isospins • Kaon currents in the nuclear matter • Hypernuclei at extreme isospins • Cold neutron matter • L/S coupling The HypHI project, T.R. Saito, HYP2006 Mainz

  12. Accelerator facility at GSI The HypHI project, T.R. Saito, HYP2006 Mainz

  13. Accelerator facility at GSI FRS The HypHI project, T.R. Saito, HYP2006 Mainz

  14. Phase 0 of HypHI • The goal of the Phase 0 experiments • To confirm Dubna’s hypernuclear production at 2 A GeV with 6Li primary beams : Mesonic decay L -> p- + p 3LH ->p-+3He 4LH ->p-+4He 5LHe ->p-+4He+p The HypHI project, T.R. Saito, HYP2006 Mainz

  15. ALADiN magnet The HypHI project, T.R. Saito, HYP2006 Mainz

  16. TOF detectors • TOF-start (new development) • Polycrystalline diamond detector • High rate: 108 /s • Excellent time resolution: < 15 ps • ALADiN TOF wall (existing) • Plastic scintillator bars • For negative charged particles (mainly p-) • Horizontal(x)-vertical(y) tracking • TOF+ (new development) • Plastic scintillator bars • For positive charged particles • xy tracking • GSI The HypHI project, T.R. Saito, HYP2006 Mainz

  17. Scintillating fiber arrays • TR0 • x and y planes • Energy and time readout • TR1 and TR2 • x, y and d planes • Time readout • Used for tracking triggers • Osaka Electro-communication University, Osaka Univ., Mainz Univ., GSI The HypHI project, T.R. Saito, HYP2006 Mainz

  18. TR2 Trigger design target • Tracking trigger (K+ and K0 channel) • Two types of vertices • One vertex in the target • Meson production • Fragmentation • Vertex out of the target • Hypernuclear decay • Free-L decay • FPGA/DSP based trigger module • Efficiency to 4LH events : ~ 14 % • GSI, Mainz Univ. TR1 → HypHI poster, S. Minami et al The HypHI project, T.R. Saito, HYP2006 Mainz

  19. p- trigger (hypernuclear decay) • p- from the target • Low momentum • Hitting to the side yoke of the ALADiN magnet • p- from hypernuclei and free-L at projectile rapidity region • Lorentz boosted at g~3 • Larger momentum • Observed by the ALADiN TOF • Efficiency • 28 % for 4LH events → HypHI poster, S. Minami et al The HypHI project, T.R. Saito, HYP2006 Mainz

  20. Z=2 trigger by TOF+ • Z=2 particles from the hypernuclear decay • 3LH -> 3He + p- • 4LH -> 4He + p- • 5LHe -> 4He + p + p- • By TOF+ • Efficiency • 95 % for 4LH events → HypHI poster, S. Minami et al The HypHI project, T.R. Saito, HYP2006 Mainz

  21. Estimates • Beam: 6Li, 107 /s, 2 A GeV • Target: 12C, 8 g/cm2 • Trigger efficiency with tracking + p- + Z=2: 7 % • Trigger rate: ~ 340 Hz • Additional detectors considered • K+ detector: Osaka Univ. • Drift chambers: GSI, KEK • Proposal: submitted to the GSI PAC • Experiment: beginning of 2008 • What to be measured: • Cross section • Lifetime • Polarization • Forward correlation between L and other charged particles 4LH → HypHI poster, S. Minami et al The HypHI project, T.R. Saito, HYP2006 Mainz

  22. HypHI Project at GSI/FAIR • HypHI project started • LOI and progress report to the GSI PAC, Design study • Design study, preparation for the phase 0 experiment • Phase 0: experiment with 3LH, 4LH and 5LHe • Design study for the setup for hypenuclear non-mesonic weak decay measurements • Phase 1: Experiments for proton-rich hypernuclei • Phase 2: Experiment for neutron- rich hypernuclei at R3B/NuSTAR/FAIR • Phase 3: Hypernuclear separator • Hypernuclear magnetic moments • Hypernuclear drip-lines 2004 2005 2006 2007 2008 2009 2010 ~2011 The HypHI project, T.R. Saito, HYP2006 Mainz

  23. HypHI Project at GSI/FAIR Phase 0 • HypHI project started • LOI and progress report to the GSI PAC, Design study • Design study, preparation for the phase 0 experiment • Phase 0: experiment with 3LH, 4LH and 5LHe • Design study for the setup for hypenuclear non-mesonic weak decay measurements • Phase 1: Experiments for proton-rich hypernuclei • Phase 2: Experiment for neutron- rich hypernuclei at R3B/NuSTAR/FAIR • Phase 3: Hypernuclear separator • Hypernuclear magnetic moments • Hypernuclear drip-lines 2004 2005 > 103 /week > 104 /week 2006 2007 2008 2009 2010 ~2011 The HypHI project, T.R. Saito, HYP2006 Mainz

  24. HypHI Project at GSI/FAIR Phase 0 • HypHI project started • LOI and progress report to the GSI PAC, Design study • Design study, preparation for the phase 0 experiment • Phase 0: experiment with 3LH, 4LH and 5LHe • Design study for the setup for hypenuclear non-mesonic weak decay measurements • Phase 1: Experiments for proton-rich hypernuclei • Phase 2: Experiment for neutron- rich hypernuclei at R3B/NuSTAR/FAIR • Phase 3: Hypernuclear separator • Hypernuclear magnetic moments • Hypernuclear drip-lines 2004 2005 > 103 /week > 104 /week 2006 Phase 1 2007 2008 2009 2010 ~2011 The HypHI project, T.R. Saito, HYP2006 Mainz

  25. HypHI Project at GSI/FAIR Phase 0 • HypHI project started • LOI and progress report to the GSI PAC, Design study • Design study, preparation for the phase 0 experiment • Phase 0: experiment with 3LH, 4LH and 5LHe • Design study for the setup for hypenuclear non-mesonic weak decay measurements • Phase 1: Experiments for proton-rich hypernuclei • Phase 2: Experiment for neutron- rich hypernuclei at R3B/NuSTAR/FAIR • Phase 3: Hypernuclear separator • Hypernuclear magnetic moments • Hypernuclear drip-lines 2004 2005 > 103 /week > 104 /week 2006 Phase 1 2007 2008 2009 2010 Phase 2 ~2011 The HypHI project, T.R. Saito, HYP2006 Mainz

  26. HypHI Project at GSI/FAIR Phase 0 • HypHI project started • LOI and progress report to the GSI PAC, Design study • Design study, preparation for the phase 0 experiment • Phase 0: experiment with 3LH, 4LH and 5LHe • Design study for the setup for hypenuclear non-mesonic weak decay measurements • Phase 1: Experiments for proton-rich hypernuclei • Phase 2: Experiment for neutron- rich hypernuclei at R3B/NuSTAR/FAIR • Phase 3: Hypernuclear separator • Hypernuclear magnetic moments • Hypernuclear drip-lines 2004 2005 > 103 /week > 104 /week 2006 Phase 1 2007 2008 2009 2010 Phase 3 ~2011 The HypHI project, T.R. Saito, HYP2006 Mainz

  27. International Hypernuclear Network • PANDA at FAIR • 2012~ • Anti-proton beam • Double L-hypernuclei • g-ray spectroscopy • SPHERE at JINR • Heavy ion beams • Single L-hypernuclei • MAMI C • 2007~ • Electro-production • Single L-hypernuclei • L-wavefunction • HypHI at GSI/FAIR • Heavy ion beams • Single L-hypernuclei at extreme isospins • Magnetic moments • JLab • 2006~ • Electro-production • Single L-hypernuclei • L-wavefunction • FINUDA at DAFNE • e+e- collider • Stopped-K- reaction • Single L-hypernuclei • g-ray spectroscopy (2012~) • J-PARC • 2009~ • Intense K- beam • Single and double L-hypernuclei • g-ray spectroscopy for single L The HypHI project, T.R. Saito, HYP2006 Mainz

  28. The HypHI project, T.R. Saito, HYP2006 Mainz

  29. Backup slides The HypHI project, T.R. Saito, HYP2006 Mainz

  30. TR2 Trigger design target • Tracking trigger (K+ and K0 channel) • Two types of vertices • One vertex in the target • Meson production • Fragmentation • Vertex out of the target • Hypernuclear decay • Free-L decay • FPGA/DSP based trigger module • Efficiency to 4LH events : ~ 14 % TR1 The HypHI project, T.R. Saito, HYP2006 Mainz

  31. Tracking trigger • Made with scinitillating fiber trackers • Secondary vertex behind the target Hypernuclear/L decay 500 MHz T to VME bus Discriminator card with GSI chip-3 LVDS VME Logic module with FPGA and DSP PMT HAMAMATSU 32 pixels From Mainz/KaoS collaboration VME Logic module with FPGA and DSP VME Logic module with FPGA and DSP New development at GSI Tracking trigger The HypHI project, T.R. Saito, HYP2006 Mainz

  32. Phase 0 of HypHI • The goal of the Phase 0 experiments • To confirm Dubna’s hypernuclear production at 2 A GeV with 6Li primary beams : Mesonic decay L -> p- + p 3LH ->p-+3He 4LH ->p-+4He 5LHe ->p-+4He+p The HypHI project, T.R. Saito, HYP2006 Mainz

  33. Improved setup for phase 0 Positive charged particles p, d, t, 3He, 4He,6Li Negative charged particles p- The HypHI project, T.R. Saito, HYP2006 Mainz

  34. Expanding field FINUDA at Frascati J-PARC ->Noumi, Tamura, Fukuda, Nakazawa, Hiyama, -> De Mori ->Motoba, Garialdi, Tedeschi, Tang, Tang, Hahimoto, Song CEBAF Kaos at MAMI C PANDA at FAIR/GSI The HypHI project, T.R. Saito, HYP2006 Mainz

  35. Expanding field FINUDA at Frascati J-PARC • Difficulties on these experiments • Direct measurements on hypernuclear magnetic moments • Quark bulding blocks (Qurak Pauli effect and so on) • L/S coupling • Kaon currents in nuclei • Hypernuclei away from the b-stability line (at extreme isospins), especiaaly for heavy hypernuclei • Isospin dependence on the hyperon wavefunction • LN interactions • Very neutron rich hypernuclei (cold neutron matter) • Very proton rich hypernuclei Heavy ion induced hypernuclear spectroscopy CEBAF Kaos at MAMI C PANDA at FAIR/GSI The HypHI project, T.R. Saito, HYP2006 Mainz

  36. Why hypernuclei Baryons in the core of neutron stars Baryon-baryon interaction t ~ 10-10 s N.N. : Nuclear reaction S.H. : Single-s Hypernuclei D.H. : Double-s Hypernuclei The HypHI project, T.R. Saito, HYP2006 Mainz

  37. Hypernuclear landscape • Essential to study baryon-baryon interaction under SU(3)f • 40/64 vertices can be studied with hypernuclei The HypHI project, T.R. Saito, HYP2006 Mainz

  38. S=-1 sector • Only 37 L-hypernuclei identified The HypHI project, T.R. Saito, HYP2006 Mainz

  39. New VME logic module • Purely VME based • 256 channels I/O LVDS • Fast logic calculations with a large FPGA at 500 MHz • Slow complicated calculations by DSP • Data transfer to the VME bus • Modules will also be used by the MAMI C KaoS experiments The HypHI project, T.R. Saito, HYP2006 Mainz

  40. FAIR: a future facility of GSI Current facility NUSTAR China is an associated member of FAIR!! The HypHI project, T.R. Saito, HYP2006 Mainz

  41. sweeping magnet ALADiN detector for x,y,DE Sci2 TR2 scintillator barrel TR1 superconducting magnet target 1m to beam dump TP-MUSIC collimator Sci1 Hypernuclear separator (Phase 3) • Hypernuclear production at 20 A GeV at the FAIR facility • Hypernuclei separated by a superconducting magnet • Hypernuclear magnetic moments • Hypernuclei toward the nucleon drip-lines The HypHI project, T.R. Saito, HYP2006 Mainz

  42. Hypernuclear separator (Phase 3) • Hypernuclear production at 20 A GeV at the FAIR facility • Hypernuclei separated by a superconducting magnet sweeping magnet ALADiN detector for x,y,DE Sci2 TR2 scintillator barrel TR1 superconducting magnet target 1m to beam dump TP-MUSIC collimator Sci1 Hypernuclear production at 20 A GeV. Carbon or diamond target, 12g/cm2. The HypHI project, T.R. Saito, HYP2006 Mainz

  43. Hypernuclear separator (Phase 3) • Hypernuclear production at 20 A GeV at the FAIR facility • Hypernuclei separated by a superconducting magnet sweeping magnet ALADiN detector for x,y,DE Sci2 TR2 scintillator barrel TR1 superconducting magnet target 1m to beam dump TP-MUSIC collimator Sci1 4m long superconducting magnet. Separation of hypernuclei with the collimator. The HypHI project, T.R. Saito, HYP2006 Mainz

  44. 6Li, 4LHe, 4He 5LHe 4LH 3LH, 3H 3LHe, 3He [cm] 10 20 30 40 Hypernuclear separator (Phase 3) • Separation by the 4m 5T magnet 6Li + 12C at 20 A GeV The HypHI project, T.R. Saito, HYP2006 Mainz

  45. Hypernuclear separator (Phase 3) • Hypernuclear production at 20 A GeV at the FAIR facility • Hypernuclei separated by a superconducting magnet sweeping magnet ALADiN detector for x,y,DE Sci2 TR2 scintillator barrel TR1 superconducting magnet target 1m to beam dump TP-MUSIC collimator Sci1 Removing light hadrons from the hypernuclear decay before the sweeping magnet. The HypHI project, T.R. Saito, HYP2006 Mainz

  46. Hypernuclear separator (Phase 3) • Hypernuclear production at 20 A GeV at the FAIR facility • Hypernuclei separated by a superconducting magnet sweeping magnet ALADiN detector for x,y,DE Sci2 TR2 scintillator barrel TR1 superconducting magnet target 1m to beam dump TP-MUSIC collimator Sci1 Hypernuclear events reconstruction tagged by mesonic and non-mesonic weak decay The HypHI project, T.R. Saito, HYP2006 Mainz

  47. Hypernuclear separator (Phase 3) • Hypernuclear production at 20 A GeV at the FAIR facility • Hypernuclei separated by a superconducting magnet sweeping magnet ALADiN detector for x,y,DE Sci2 TR2 scintillator barrel TR1 superconducting magnet target 1m to beam dump TP-MUSIC • Precession of the spin distribution of hypernuclei. • Precession angle : • 225 degrees with free-L magnetic moment • 205 degrees with 8.8% reduction due to the kaon exchanging current collimator Sci1 The HypHI project, T.R. Saito, HYP2006 Mainz

  48. Hypernuclear separator (Phase 3) • Hypernuclear production at 20 A GeV at the FAIR facility • Hypernuclei separated by a superconducting magnet Asymmetric pionic hypernuclear decay Almost 4 p sr solid angle sweeping magnet ALADiN detector for x,y,DE Sci2 TR2 scintillator barrel TR1 superconducting magnet target 1m to beam dump TP-MUSIC • Precession of the spin distribution of hypernuclei. • Precession angle : • 225 degrees with free-L magnetic moment • 205 degrees with 8.8% reduction due to the kaon exchanging current collimator Sci1 The HypHI project, T.R. Saito, HYP2006 Mainz

  49. Rate estimate with the hypernuclear separator (Phase 3) • Beam intensity : 1010/s at 20 A GeV • Target : 12C, 12 g/cm2 • Reconstruction efficiency in the decay region : 10 % The HypHI project, T.R. Saito, HYP2006 Mainz

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