Hadron Physics at J-Parc
Hideto En’yo
RIKEN

Introduction
Recent discoveries
Letter of Intent to J-Parc
Outlook
2004/06/08

Hideto En'yo / RIKEN

1Approaches
in HadronPhysics
Studies of Structure andProperties of Hadron

Physics of
Quark-Gluon
Multi-body
SystemMystery of Confinment

Searchfor Exotic Particles
2004/06/08

Hideto En'yo / RIKEN

2
De-confinement

1Structure
andboundProperty
DeeplyVector Meson
Mass Modification

Gluon
Polarizationin Proton

Modify the circumstances（Density, Temperature）
Temperature）

igHhgyCollective
FlowM

acnehi

Quark-Gluon
Physics of Multibody SystemerEnM
Deeply Bounde
En dium
KaonicMNucluse
ac r gyhine

pion sensing
InsiteEvents/(0.02 GeV/c2)

15Searching

Mystery of Confinement

10

Neutron Star
Penta Quark
Strange Matter
Multi-Quark State50

2004/06/08

Quark Gluon Plasma
Jet Quenching

1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8
MMcγK− (GeV/c2)

Deconfinement

Hideto En'yo / RIKEN

3

Discovery Machinemust be built at
Right TimeandRight Energy
N. P. Samios
2004/06/08

Hideto En'yo / RIKEN

42

Year 2000
(Year of Miracle)!RHIC First CollisioningmoBlowoN!SPring-8 First Experiment!JHF approved (succeedingKEK-PS)
10 ?
02niing
moo!RIBF construction
startedBl

2004/06/08

Hideto En'yo / RIKEN

5

2004/06/08

Hideto En'yo / RIKEN

6

15
Events/(0.02 GeV/c2)

New (and may be the last )PS-SKS Experimentfor Penta-quark

SPring8105

01.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8c2MMγK− (GeV/c )K+P→π+θ+
1.35MeV

2004/06/08

Hideto En'yo / RIKEN

7LoI03: Hadron Spectroscopy
LoI01:Measurements of the spin rotation parameters A and R in
the resonance region of π N elastic scattering
LoI28:A hadron spectroscopy experiment with RF-separated highenergy K beam at JHF
Where do the gluonic degrees of freedom appear? dde r e e r yi
Are there “exotic” states of mesons and baryons?
sne co discovbt
Where are the “missing” hyperonstates?
smu quarkeg
 Is the baryon spectrum
consistentnrra e pentawith a parity doublingsae
Can all threeRquarks inn athbaryon be a quark-diquark ?
odPolarized beam/target
will also be usefulBa s eEtc.
The proposed measurements will aid in understanding the longwavelength degrees of freedom of QCD and the nature ofconfinement.
2004/06/08

Hideto En'yo / RIKEN

84

Issues on Pentaquark

Mass (MeV)

Di-Tri quark cluster structure development
2200
Color Magnetic InteractionL=0
on S-quark
L=1→ Level inversion of Natural/Unnatural Parity
2000
ss→ Possiblity of Many More Multiquark states
1800
ud

ud

s=01600
L=01400

ΘKN
s=11200
Γ=BROAD
1000
Γ~1MeV?
2004/06/08

exp.

ud

ud

1/2−
3/2−1/2+, 3/2+,

AMDcalc.
calculation
Y.K.
En’yo
M = 2385
MeVs=0degenerate
L=1

s=0

Γ=7MeV4q q

Hideto En'yo / RIKEN

9KEK-PS: Search for Deeply
Bound Kaonic StateTOF Measurementfor Deep-K
Spectroscopy• LoI10: Study of Dense K-Nuclear System
Nagae & Iwasaki et al.
(K−＋A→N＋KA−1) ＠ Day-1

2004/06/08

Hideto En'yo / RIKEN

105

ChiralSymmetryin Dense
MatterPS-E325

LoI-11: Electoron Ball Project•HBD
Hadron Blind Detector•EM cal•Silicon Tracking

2004/06/08

Hideto En'yo / RIKEN11The Phase Diagram for Nuclear Matter

Murakami
Enyo Iwasaki

2004/06/08

Hideto En'yo / RIKEN

126

LoI18: Energy Dependence of Intermediate-Mass
Fragment Angular-Distribution:
Probing Nuclear Liquid-Gas Phase Transition

Shock Wave?

2004/06/08

Hideto En'yo / RIKEN

13

 Variable Energy Hadron Beamaround 10 GeV/c.
New Generation Real 4π Detector.
Tagging Energy-loss of Primary Beam.

2004/06/08

Hideto En'yo / RIKEN

147

pQCD at extream
LoI15:Physics of High-Mass Dimuon Production at the50-GeV Proton Synchrotron
LoI03:Analyzing power AN in 50 GeV very-high-P2T
proton-proton elastic scattering

Nucleon structure at High-XBJ, High-XT, High-XF

2004/06/08

Hideto En'yo / RIKEN
Double staged
Magnet Di-muon Spectrometer15

Physics with dimuon @ 50 GeV• d/u at large x•Anti quark PDF in A
•Quark energy loss in A
•PDF in large x•Drell-Yan and J/ψ withpolarized beam.

2004/06/08

Hideto En'yo / RIKEN

168

LoI14: Construction of High Momentum Beam line
• Secondary Beams:– Use a thin (2% = 15kW loss) target at SM1– Collect them at forward angles– Transfer them for ~120m• Schematic Layout around SM1:

Shielding of the switching yard has
been designed to accommodate theloss at SM1

2004/06/08

Hideto En'yo / RIKEN

17Beam Line Configuration & Optics• Primary Beams:– 1014 primary protons Î 109-1010
protons: beam stealer– 1014 primary protons Î ~1012
protons: electrostatic septum. Highheat and radiation deposit have to betaken into account(R&D)– 100 % of the primary beam,
conventional bending magnet :Field free hole

• Weak primary beam (at the beginning ofthe accelerator operation, and heavy ionbeam or polarized beam in the future
2004/06/08

Hideto En'yo / RIKEN

189

Cost & Schedule: Magnets from the World• Total cost : $5-8M??
• No construction budget. Seeking
for reuse of second-handmagnets…
• Already from SLAC, Saclay,CERN, …
• The high momentum beam line
can be constructed even at thebeginning of the NP halloperation from the viewpoint ofthe facility design.
Large dipole magnets at the Meson
Pol beam line (FNAL)
2004/06/08

Hideto En'yo / RIKEN

19Summery•Recent discoveries in hadronic physics are jus surprising•MANY of these findings are studied extensively at Jparc–Multi-quark state / Hadron Spectroscopy–Dense Strange Matter–Chiral symmetry at dense matter–Nuclear Phase Diagram : Color-Super > liquid > gas >(QGP)–pQCD at extreme• J-Parc, to be built at right time and at right energy•General purpose High Momentum Beam Line, planningon going.
2004/06/08

Hideto En'yo / RIKEN

2010

*N ;
γnK+K- invariant mass

π+K

πp

N*-n+
ΘK+

CLAS @ J-Lab
2004/06/08

Hideto En'yo / RIKEN

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