Transcript Prospects for Hadron Physics in Asia

Prospects for Hadron
Physics in Asia
H. Shimizu
Laboratory of Nuclear Science
Tohoku University
,
 .21 24,2005,  , 
Diversity of Hadron Physics
confinement
phase transition
at high temperature
HI beam
chiral symmetry
precursors to
chiral transition
in nuclei
g beam
hadron beam
QCD
Hadron Physics
research
in free space
in nuclear matter
spectroscopy
the most basic study
Major accelerators for hadron physics
in Asia
HIRFL
Lanzhou Univ.
CSRs
RCNP, Osaka
400MeV
IHEP, Beijing
cyclotron
LNS, Sendai
BEPC
Tohoku Univ.
BEPC II
1.2GeV
PAL, Pohang
2.5GeV
SSRF, Shanghai
3.5GeV
SPring-8
8GeV
KEK
B factory
J-PARC 50GeV
12GeV PS
RIKEN
K540 cyclotron
RIBF
Hadron Physics
with
e+e collider machines
KEK
~ 50km NE from Tokyo
KEKB
for the study of CPV
3.5 GeV
e
8 GeV
+
L  1.58 1034 cm2 s 1
1
 L  500 fb
KEKB turned out to be
a good laboratory to search
for new hadrons as well.
e
e+

s  10.6GeV
 (4S )  BB
 g  0.425
world highest luminosity
L  1.58 1034 cm2 s 1
1
L

500
fb

hadron spectroscopy
Observation of X(3872) at Belle
found in B meson decays
out of 152M B B data
 (2 S )   +  J /
B+  X (3872) K +
X (3872)   +  J /
M  3872.4  0.7 MeV
  2.3MeV (90%C.L.)
narrow width
DD *
M (J / )  M ( J / )
multiquark molecular state?
diquark-antidiquark bound state?
Super B factory plan at KEK

Towards higher luminosity
New charmed hadrons
found at Belle up to now
c (2S )
D0* ( 2308)
D1 ( 2427)
More RF power
New beam pipe
Damping ring
 c ( 2800)

Increase beam currents
Linac upgrade
1.6 A (LER) / 1.2 A (HER)
→ 9.6 A (LER) / 4.1 A (HER)
2 1
L  3.5 10 cm s
35
X (3872)
X (3940)
Y (3940)
• key issue:
highest luminosity
L  1.581034 cm2 s 1
IHEP, Beijing
BEPC:
Research on charm and t lepton physics
circumference=240m
BESII
200m LINAC
Recent results from BESII

Threshold enhancements: new hadrons?
pp :
M=1859MeV <30MeV J /  gpp
p + p : M=2075MeV =90MeV J /  pK   + pK + 
PRL91(2003)022001, PRL93(2004)112002

Study of light scalar mesons
s, k, f0(1370), f0(1500), f0(1710), f0(1790), ….
s: M  i / 2  (541 39)  i(252 42)MeV J /   + 
PLB598(2004)149

Existence of s is confirmed.
…..
BEPCII project
design goals
L  11033 cm2 s 1
BESIII
@1.89GeV
BSRF
[email protected]
Upgrade:
by the end of 2006
Hadron Physics
with
hadron beams
HIRFL, Lanzhou
Heavy Ion Research Facility in Lanzhou
Experimental setup at HIRFL-CSR
Cooling Storage Ring
CSR performances
CSRm
P,C-U
CSRe
P,C-U, RIB,HCI,
Molecular &
Cluster
P/P
2350 2800 (P)
900 1100 (12C6+)
420 520 (238U72+)
<10-4
2000(P)
620 760 (12C6+)
400 500 (238U>90+)
<10-5
P/P (entrance)
0.15%
0.5~1%
Emmitance
 5  mm-mrad
 1  mm-mrad
Ion Species
Energy (MeV/u)
(Bmax=1.4 1.6 T)
Physics goals at CSR
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Radioactive ion beam physics
Few body study with
HI beam (<1.1GeV/u) and p beam (<2.8GeV)
High charge state of atomic physics
Physics under high density and temperature
Studies on mesons and baryons
Search for multi-quark states
…..
RIKEN has discovered a variety of
anomalous nuclear phenomena
New Element
278
113
04 July 23
57 fb
RIKEN RIBF Project
Experimental arrangement of beam lines
Phase II:
Phase 0: 1987~
135MeV/u
for light nuclei
Phase I:
350MeV/u
up to U
1st beam in 2006
SCRIT
J-PARC Facility
Materials and Life Science
Experimental Facility
Hadron Beam Facility
Nuclear
Transmutation
500 m
Neutrino to
Kamiokande
Linac
(350m)
3 GeV Synchrotron
(25 Hz, 1MW)
50 GeV Synchrotron
(0.75 MW)
J-PARC = Japan Proton Accelerator Research Complex
Joint Project between KEK and JAERI
J-PARC Phase 1 & 2
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The budget for about 2/3 of the entire project has been approved
by the Japanese government from JFY2001 as Phase 1.
Phase 1 (~151 billion Yen = 1.1 billion Euro) consists of major
accelerator components and a part of experimental facilities.
commissioning
in 2007
J-PARC: the High Intensity Frontier

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J-PARC aims for the high intensity
frontier for

Materials/life sciences (3GeV), and

Nuclear/particle physics (50GeV)
High intensity proton beam leads to
high intensity secondary (neutron,
meson, …) beam.

The power (= Energy x Current) is
a good measure.

Neutrons: from 0.16MW (ISIS) to
1MW

K mesons: 5 to 10 times more
intense than existing BNL-AGS.
World’s Proton Accelerators
Hadron Physics at J-PARC

Kon decays
CP violation in K L   0

Hypernuclear physics
high resolution spectroscopy
of  nuclei
g-ray spectroscopy in  nuclei
spectroscopy of S=-2 system
with (K, K+) reactions

Hadrons in the nuclear medium
deeply-bound kaonic nuclear states
> cold &dense nuclear matter
vector mesons in nuclear matter

Exotic hadrons
K(1.8 GeV/c)
(K,K+), S2
K+(0.8 GeV/c)
K+ rare decay
K(1.1 GeV/c)
(K,), S=1
pentaquarks
LOI: 478 physicists with 2/3 from outside Japan
Hadron Physics
with
photon beams
SPring-8
(Super Photon ring-8 GeV)
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Third-generation synchrotron radiation facility
Circumference: 1436 m
100 mA
(x610-9 m·rad)
62 beamlines
LEPS beam
+
Energy Spectrum
2.4 GeV
8 GeV
New LEPS beam line

2 operation modes
107  108 photons/ s
1. high intensity mode
a high power laser + round beam technique
2. high energy mode
X rays from SPring-8, bent by ~180o with 10 diamond mirrors
from another small accelerator
High energy mode
diamond crystal mirrors
reflectivity of diamond mirrors
reflectivity of mirrors
for 100 eV photons: ~80% for a reflection angle of 200
~10% for 100 eV photons bent by 1800
7.4 GeV LEPS beam
High energy CBS provides a qusi-monochromatic g beam
Sales points for new LEPS beam
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The cleanest g beam in the world at a 7 GeV
energy region
Good for experiments detecting super-forward
events
A polarized g beam with the highest polarization
in the world
Polarization of vector mesons in precursors to the
chiral transition
Unique experiments
(e.g.: a measurement of birefringence in a strong
magnetic field)
Pohang Accelerator Laboratory
Korea
Bremsstrahlung beam line
under consideration
2.5 GeV Storage Ring
Pohang Light Source
Shanghai Synchrotron Radiation
Facility (SSRF)
Construction started in Dec. 2004.
SSRF Layout
100MeV Linac
3.5GeV Booster
3.5GeV Storage Ring
circumference: 432m
Shanghai Laser Electron
Gamma Source (SLEGS)
High intensity quasimonochromatic MeV g-rays
Summary
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e+e collider machines
High luminosity brings discoveries of new hadrons, exotics, and new
physics as KEKB and BEPC have proved.
BEPC II is under construction toward higher luminosity.
The super KEKB project will be proposed in 2008, with preceding minor
upgrade starting in 2005, aiming for one order higher luminosity
Hadron beams
CSR and RIBF projects are going on at Lanzhou and RIKEN to open the
door to presently unreachable regions on the nuclear chart.
J-PARC will look into hadron physics which cannot be explored without a
high intensity beam, such as (K-,K+) physics, meson decays into di-leptons
in nuclear matter and so on. Research on exotic hadrons like + will be
another thing to be done at J-PARC. Commissioning of the 50 GeV PS is
scheduled to take place in 2007.
Photon beams
There are several synchrotron radiation facilities or a facility-to-be in Asia,
where CBS beams or Bremsstrahlung beams can be used for hadron physics.
A 7 GeV quasi mono-energetic LEPS beam is under consideration.
Plan view of LNS beam lines
 photoproduction
S11(1535)
H, C, Cu
Hyper nuclear physics
New spectrometer at LNS, Sendai
Multiple g-ray Detecting System
J-PARC at Tokai
J-PARC is a joint project between KEK and
JAERI (Japan Atomic Energy Research Institute).

KAMIOKA
JAERI
KEK
Tsukuba
TOKYO
NARITA
Tokai