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Prospects for Hadron Physics in Asia
H. Shimizu
Laboratory of Nuclear Science
Tohoku University
,,2005,2421.,
Diversity of Hadron Physics
QCD
Hadron Physics
research
spectroscopythe most basic study
chiral symmetry
in nuclear matterin free space
confinementphase transitionat high temperatureHI beam
precursors to chiral transitionin nuclei beamhadron beam
Major accelerators for hadron physics in Asia
KEKB factory
IHEP, BeijingBEPC
BEPC II
LNS, SendaiTohoku Univ.
1.2GeV
RIKENK540 cyclotron
RIBF
RCNP, Osaka400MeVcyclotron
HIRFLLanzhou Univ.
CSRs
J-PARC 50GeV12GeV PS
PAL, Pohang2.5GeV
SSRF, Shanghai3.5GeV SPring-8
8GeV
Hadron Physicswith
ee collider machines
KEK~ 50km NE from Tokyo
KEKB
1
1234
500
1058.1
fbL
scmLe
8 GeV3.5 GeV ee
425.0
)4(
6.10
BBS
GeVs
1
1234
500
1058.1
fbL
scmL
for the study of CPV
KEKB turned out to be a good laboratory to searchfor new hadrons as well.
hadron spectroscopy
world highest luminosity
Observation of X(3872) at Belle
/)3872(
/)2(
JX
JS
)/()/( JMJM
found in B meson decays
out of 152M dataBB
.).%90(3.2
7.04.3872
LCMeV
MeVM
KXB )3872(
*DD
multiquark molecular state?diquark-antidiquark bound state?
narrow width
Super B factory plan at KEK Towards higher luminosity
)2800(
)3940(
)3940(
)3872(
)2427(
)2308(
)2(
1
*0
c
c
Y
X
X
D
D
S
New charmed hadronsfound at Belle up to now
1235105.3 scmL
• key issue: highest luminosity
12341058.1 scmL
Linac upgrade
Damping ring
More RF power
Increase beam currents1.6 A (LER) / 1.2 A (HER) → 9.6 A (LER) / 4.1 A (HER)
New beam pipe
IHEP, Beijing
circumference=240m
200m LINACBEPC:Research on charm and lepton physics
BESII
Recent results from BESII Threshold enhancements: new hadrons?
M=1859MeV <30MeV
M=2075MeV =90MeV
PRL91(2003)022001, PRL93(2004)112002
Study of light scalar mesons
, , f0(1370), f0(1500), f0(1710), f0(1790), ….
:
PLB598(2004)149
Existence of is confirmed. …..
KppKJ
ppJ
/
/
:
:
pp
pp
MeViiM )42252()39541(2/ /J
BEPCII project
BESIII GeV
scmL
89.1@
101 1233
BSRF [email protected]
design goals
Upgrade: by the end of 2006
Hadron Physicswith
hadron beams
HIRFL, LanzhouHeavy Ion Research Facility in Lanzhou
Experimental setup at HIRFL-CSRCooling Storage Ring
CSR performances
CSRm CSRe
Ion Species P,C-U P,C-U, RIB,HCI,
Molecular & Cluster
Energy (MeV/u)
(Bmax=1.4 1.6 T)
2350 2800 (P)
900 1100 (12C6+)
420 520 (238U72+)
2000(P)
620 760 (12C6+)
400 500 (238U>90+)
P/P <10-4 <10-5
P/P (entrance) 0.15% 0.5~1%
Emmitance 5 mm-mrad 1 mm-mrad
Physics goals at CSR
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
04 July 23 57 fb
113278
RIKEN RIBF Project
Phase 0: 1987~135MeV/ufor light nuclei
Phase I:350MeV/uup to U1st beam in 2006
Phase II:
SCRIT
Experimental arrangement of beam lines
J-PARC Facility
Materials and Life ScienceExperimental Facility
Hadron Beam Facility
Neutrino to Kamiokande
Nuclear Transmutation
J-PARC = Japan Proton Accelerator Research Complex
Joint Project between KEK and JAERI
50 GeV Synchrotron(0.75 MW)
3 GeV Synchrotron(25 Hz, 1MW)
Linac(350m)
500 m
J-PARC Phase 1 & 2 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
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
0LK Kon decays
CP violation in Hypernuclear physics
high resolution spectroscopy of nuclei-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 mattervector mesons in nuclear matter
Exotic hadronspentaquarks
(1.8 GeV/c) S
0.8 GeV/c) rare decay
(1.1 GeV/c) (K,), S=1
LOI: 478 physicists with 2/3 from outside Japan
Hadron Physicswith
photon beams
SPring-8 (Super Photon ring-8 GeV)
Third-generation synchrotron radiation facility Circumference: 1436 m 100 mA (x10-9 m·rad) 62 beamlines
LEPS beam
2.4 GeV 8 GeV
Energy Spectrum
New LEPS beam line 2 operation modes
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
sphotons /1010 87
High energy mode
diamond crystal 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
reflectivity of diamond mirrors
High energy CBS provides a qusi-monochromatic beam
Sales points for new LEPS beam
The cleanest beam in the world at a 7 GeV energy regionGood for experiments detecting super-forward events
A polarized beam with the highest polarization in the worldPolarization of vector mesons in precursors to the chiral transition Unique experiments (e.g.: a measurement of birefringence in a strong magnetic field)
Pohang Accelerator LaboratoryKorea
2.5 GeV Storage RingPohang Light Source
Bremsstrahlung beam lineunder consideration
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 quasi-monochromatic MeV -rays
Summary
ee collider machinesHigh 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 beamsCSR 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 beamsThere 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
photoproductionS11(1535)H, C, Cu
Hyper nuclear physics
New spectrometer at LNS, Sendai
Multiple -ray Detecting System
J-PARC at Tokai
TOKYO
KEK
JAERI
NARITA
KAMIOKA
Tokai
Tsukuba
J-PARC is a joint project between KEK and JAERI (Japan Atomic Energy Research Institute).