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 250mA@2.5GeV

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).