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The HypHI project at GSI Hypernuclear spectroscopy with heavy ion beams Take R. Saito, for the HypHI collaboration GSI-Darmstadt Helmholtz Center for Heavy.

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Presentation on theme: "The HypHI project at GSI Hypernuclear spectroscopy with heavy ion beams Take R. Saito, for the HypHI collaboration GSI-Darmstadt Helmholtz Center for Heavy."— Presentation transcript:

1 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

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

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

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

5 The HypHI project, T.R. Saito, HYP2006 Mainz 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  -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  - asymmetry → magnetic moments Can be performed only at FAIR in near future

6 The HypHI project, T.R. Saito, HYP2006 Mainz The HypHI project 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 23 rd 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

7 The HypHI project, T.R. Saito, HYP2006 Mainz Hypernuclei with Heavy Ion Beams: The HypHI project Heavy ion induced reaction at relativistic energies (heavy-ion collision) NN ->  KN : 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  Effective lifetime : Longer by the Lorentz factor 200 ps -> 600 ps with  =3 200 ps -> 4 ns with  =20 Only a few light hypernuclei so far identified with heavy ion beams at Dubna ( 3  H and 4  H, ~ 0.2  b, with 4 He and 7 Li beams) 

8 The HypHI project, T.R. Saito, HYP2006 Mainz Heavy Ion Beams: Powerful Tools for Hypernuclear Spectroscopy FRSSuper-FRS E > 1.7 A GeV I > 10 5 /s

9 The HypHI project, T.R. Saito, HYP2006 Mainz Hypernuclei with Heavy Ion Beams: The HypHI project Heavy ion induced reaction at relativistic energies (heavy-ion collision) NN ->  KN : 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  Effective lifetime : Longer by the Lorentz factor 200 ps -> 600 ps with  =3 200 ps -> 4 ns with  =20 Only a few light hypernuclei so far identified with heavy ion beams at Dubna ( 3  H and 4  H, ~ 0.2  b, with 4 He and 7 Li beams) 

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

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

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

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

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

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

16 The HypHI project, T.R. Saito, HYP2006 Mainz TOF detectors TOF-start (new development) Polycrystalline diamond detector High rate: 10 8 /s Excellent time resolution: < 15 ps ALADiN TOF wall (existing) Plastic scintillator bars For negative charged particles (mainly  - ) Horizontal(x)-vertical(y) tracking TOF+ (new development) Plastic scintillator bars For positive charged particles xy tracking GSI

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

18 The HypHI project, T.R. Saito, HYP2006 Mainz Trigger design Tracking trigger (K + and K 0 channel) Two types of vertices One vertex in the target Meson production Fragmentation Vertex out of the target Hypernuclear decay Free-  decay FPGA/DSP based trigger module Efficiency to 4  H events : ~ 14 % GSI, Mainz Univ. target TR1 TR2 → HypHI poster, S. Minami et al

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

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

21 The HypHI project, T.R. Saito, HYP2006 Mainz Estimates Beam: 6 Li, 10 7 /s, 2 A GeV Target: 12 C, 8 g/cm 2 Trigger efficiency with tracking +  - + 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 LifetimePolarization Forward correlation between  and other charged particles 4H4H → HypHI poster, S. Minami et al

22 The HypHI project, T.R. Saito, HYP2006 Mainz 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 3  H, 4  H and 5  He 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 ~

23 The HypHI project, T.R. Saito, HYP2006 Mainz 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 3  H, 4  H and 5  He 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 ~ Phase 0 > 10 3 /week > 10 4 /week

24 The HypHI project, T.R. Saito, HYP2006 Mainz 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 3  H, 4  H and 5  He 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 ~ Phase 0 Phase 1 > 10 3 /week > 10 4 /week

25 The HypHI project, T.R. Saito, HYP2006 Mainz 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 3  H, 4  H and 5  He 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 ~ Phase 0 Phase 1 > 10 3 /week > 10 4 /week Phase 2

26 The HypHI project, T.R. Saito, HYP2006 Mainz 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 3  H, 4  H and 5  He 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 ~ Phase 0 Phase 1 > 10 3 /week > 10 4 /week Phase 3

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

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

29 Backup slides

30 The HypHI project, T.R. Saito, HYP2006 Mainz Trigger design Tracking trigger (K + and K 0 channel) Two types of vertices One vertex in the target Meson production Fragmentation Vertex out of the target Hypernuclear decay Free-  decay FPGA/DSP based trigger module Efficiency to 4  H events : ~ 14 % target TR1 TR2

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

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

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

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

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

36 The HypHI project, T.R. Saito, HYP2006 Mainz Why hypernuclei n(udd)p(uud)(uds)(uds)nN.R.N.R.S.H.S.H. pN.R.S.H.S.H. D.H.D.H. D.H. N.N. : Nuclear reaction S.H. : Single-s Hypernuclei D.H. : Double-s Hypernuclei Baryon-baryon interaction  ~ s Baryons in the core of neutron stars

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

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

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

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

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

42 The HypHI project, T.R. Saito, HYP2006 Mainz Hypernuclear separator (Phase 3) Hypernuclear production at 20 A GeV at the FAIR facility Hypernuclei separated by a superconducting magnet 1m superconducting magnet scintillator barrel target collimator sweeping magnet detector for x,y,  E TR1 TR2 TP-MUSIC Sci1 Sci2 to beam dump ALADiN Hypernuclear production at 20 A GeV. Carbon or diamond target, 12g/cm 2.

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

44 The HypHI project, T.R. Saito, HYP2006 Mainz Hypernuclear separator (Phase 3) Separation by the 4m 5T magnet 6 Li + 12 C at 20 A GeV [cm] 6 Li, 4  He, 4 He 4H4H 3  H, 3 H 5  He 3  He, 3 He

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

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

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

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

49 The HypHI project, T.R. Saito, HYP2006 Mainz Rate estimate with the hypernuclear separator (Phase 3) Beam intensity : /s at 20 A GeV Target : 12 C, 12 g/cm 2 Reconstruction efficiency in the decay region : 10 %


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