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Welcome to Welcome to

International UHE International UHE Neutrino Neutrino

Workshop Workshop

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Hesheng Chen

Institute of High Energy Physics

Beijing 100049, China

Scientific Activities Scientific Activities

at Institute High Energy Physicsat Institute High Energy Physics

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Institute of High Energy Institute of High Energy PhysicsPhysics

Comprehensive and largest fundamental research center in China

For :For :– Particle physicsParticle physics– Accelerator technologies and applications Accelerator technologies and applications – Synchrotron radiation technologies and applicationsSynchrotron radiation technologies and applications1030 employees, ~ 650 physicists and engineers, 400 PhD Students and postdoctors

Established at 1950, and became an independent inEstablished at 1950, and became an independent institute at 1973 . stitute at 1973 .

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Research Divisions Experimental Physics center: BES, BESIII, CMS, Atlas… Particle Astrophysics Center ： cosmic ray, astrophysics,

neutrino physics, particle astrophysics… Theory Division: particle physics, nuclear physics, field

theory, cosmology… Accelerator Center: BEPC, BEPCII, high power proton

accelerator Beijing Synchrotron Radiation Lab. Nuclear Analysis Lab. Free Electron Laser Division Computer and Network Center Center of Hi-Tech R&D

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Major Facilities

• Beijing Electron-Positron Collider (BEPC)

• Beijing Spectrometer (BES)

• Beijing Synchrotron Radiation Facility (BSRF)

• Yangbajing Cosmic Ray Observatory

• Beijing Free Electron Laser (BFEL)

• High Density Slow Positron Source

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Outline

• Beijing Electron-Positron Collider

• Physics results from Beijing Spectrometer

• Non-Accelerator physics

• Synchrotron Radiation and application

• BEPCII

• Middle and Long term plan

• Summary

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Bird’s Eye View of Bird’s Eye View of BEPCBEPC

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BEPC constructed in 1984 –1988 with beam energy: 1 – 2.8 GeV– Physics Run ： Luminosity 1031cm-2s-1 @ 1.89GeV, 5 month/year– Synchrotron Radiation Run ： 140mA @ 2.2 GeV, 3 month/year

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The Beijing-Electron Positron Collider The Beijing-Electron Positron Collider (BEPC)(BEPC)

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Korea (4)

Korea University Seoul National University

Chonbuk National UniversityGyeongsang Nat. Univ.

Japan (5)

Nikow UniversityTokyo Institute of Technology

Miyazaki UniversityKEK

U. Tokyo

USA (4)

University of HawaiiUniversity of Texas at Dallas

Colorado State University Stanford Linear Accelerator Center

UK (1)Queen Mary University

China (18)IHEP of CAS

Univ. of Sci. and Tech. of ChinaShandong Univ., Zhejiang Univ.

Huazhong Normal Univ. Shanghai Jiaotong Univ.

Peking Univ., CCAST Wuhan Univ., Nankai Univ.

Henan Normal Univ.Hunan Univ., Liaoning Univ.

Tsinghua Univ., Sichuan Univ. Guangxi Univ., Guangxi Normal Univ.

Jiangsu Normal Univ.

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Main Physics Results from BESBES Precision measurement of mass: world average value c

hanged by 3, ccuracy improved by factor of 10, lepton universality

R Measurement at 2-5GeV: R/R 15-20% →6.6%– Higgs mass prediction from SM– g-2 experiment

– (Mz2) -1 : 128.890±0.090 → 128.936 ± 0.046

• Systematic study of (2S) and J/ decays.

Obtain fDs from Ds pure leptonic decay.

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World‘s largest J/ and data sample (10(1066))More interesting physics results are expected.

J/

0

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20

30

40

50

60

MarkIII DM2 BESI BESII

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4

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MARKI MarkII CrystalBall

BESI BES II

01.11-02.399.11-01.3

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Statistical Significance 7.7

BESII Preliminary

J

BES: X(1835) in

X(1835)7.7

BESII Preliminary

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2

MeV/c 7.73.207.67

MeV/c 7.21.67.1833

54264

M

Nobs

410)4.04.02.2()()( XBXJB59.1

8.0 10)4.00.7()()(:.. ppXBXJBfc

'/J

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LHC ExperimentsLHC Experiments

1. CMS – 1/3 of CSC at muon end caps– HV boards for RPC – RPC of barrel muon (Beijing Univ.) – Physics and MC

2. Atlas – Drift Monitor chambers

3. LCG: Tier 2

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Other Major research fields in IHEPOther Major research fields in IHEP

1. Non-Accelerator physics experiment– L3 Cosmic ray measurement– Yangbajing - Argo RPC carpet project– Hard X ray modulated Telescope satellite – ray burst detector– X-ray detector of Chinese Moon project.2. Theoretical physics– Particle physics– Intermediate and high energy nuclear physics– Particle-astrophysics and cosmology– Field theory

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Yangbajing Cosmic Ray Observatory （ a.s.l. 4300m ）

IHEP-INFN RPC China-Japan Air Shower Array

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AMS01 permanent magnet and structure were built at Beijing, and became the first big magnet in space as payload of Discovery June 1998.

• Search for antimatter and dark matter • precision measurement of isotopes

Alpha Magnetic Spectrometer

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Hard X-ray Modulate Telescope Satellitescan sky for point sources

Charged particle shielding

Collimator

Crystals

PMTSupport structure

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3. Accelerator technology3. Accelerator technology– high luminosity e+e- collider– high power proton accelerator– application of low energy accelerators

4. Radiation technique and application4. Radiation technique and application– Synchrotron radiation – Free electron laser– Nuclear analysis techniques and its applications– Radiation protection

5. Nuclear detector and electronics5. Nuclear detector and electronics

Other Major research fields in IHEP Other Major research fields in IHEP

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BEPC

4w1

Diffuse ScatteringX-ray fluorescence

analysis

Topography

4B9

X-ray DiffractionSmall angle scattering

Photoemission SpectroscPopy

3B1

Lithography

3W1

Middle energy

4W1B

4W1A

4B9B

4B9A3B

1B

3B1A

3W1A

3W1B

4 wigglers and 13 beam lines. > 300 exp./year from > 100 institutions

Beijing Synchrotron Radiation Facility

140mA@2.2GeV

1W1A

XAFS1W1B

High-pressure diffraction

LIGA

VUV

Macromolecular

3B3

1w1

4w2

3B3

Soft X-ray Optics

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SARS protein CoV MSARS protein CoV Mpro

Structure of MASA from MAD

Structure of CRISP Protein

Results from BSRF

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Structure of third type of light–harvester protein. The structure diffraction data taken at BSRF.

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2. BEPCII: High Lumi. Double–ring Collider

Build new ring inside existing ring . Two half new rings and two half old rings cross at two IR’s, forming a double ring collider.

BEPCII

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BEPC II Double ring Design• In the existing BEPC tunnel, add another ring, cross over at south a

nd north points, two equal rings for electrons and positrons. Advanced double-ring collision technology.

• 93 bunches ， total current > 0.9A in each ring. • Collision spacing ： 8 ns.• In south, collision with large cross-angle （ ±11 mr ） .• Calculated luminosity ： 1033 cm-2 s-1 @ 3.78GeV of C.M. energy.• Linac upgrade: e+ 50mA/min. , Full energy injection up to 1.89GeV • In north cross point, connecting SR beam between two outer rings, in south cross point, use dipole magnet to bend the beam back to out

er ring.• SR run ： 250mA @ 2.5 GeV.• Major detector upgrade ： BES III.

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1029

1030

1031

1032

1033

1034

1035

1036

1037

1 10 100 1000

GLC

ADONE

VEPP2000

KEK B and PEP II

KEK BPEP II

CESR

DAFNE

DAFNE2

BEPCIII

CESRc

Ecm

(GeV)

L (cm-2 sec-1)

VEPP2M

LEP

TRISTANPETRA

VEPP4MDORIS

SPEARBEPC

COLLIDERS

FACTORIES

SUPER FACTORIES

ee++-e-e-- Colliders: Past, Present and Future Colliders: Past, Present and Future

C. Biscari, Workshop on e+e- in 1-2 GeV Range, September 10-13, 2003, Italy

L (cm-2 s-1)

E (GeV)

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• Adapt to high event rate of BEPCII: 1033cm-2 s-1 and bunch spacing 8ns• Reduce sys. errors to match high statistics photon measurement, PID…• Increase acceptance

MDC: small cell & He gas xy=130 m sp/p = 0.5% @1GeV dE/dx=6%

EMCAL: CsI crystal E/E = 2.2% @1 GeV z = 0.5 cm/E

TOF: T = 100 ps Barrel 110 ps Endcap

Magnet: 1 T Super conducting

Muon ID: 9 layer RPC

Trigger: Tracks & ShowersPipelined; Latency = 2.4 ms

Data Acquisition: Event rate = 3 kHz Thruput ~ 50 MB/s

BESIII detectorBESIII detector

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Schedule• May – Oct. 04. : √

– Linac upgrade – BESII detector removing– Transformer system 630KW →1600KW

• Nov. 04 – June 05: Tuning and SR running √• July 05 – Sept. 06: Long shutdown

– Remove existing ring – Install two rings– Cryogenics system ready for SC devices, field mapping

• Sept. 06 - July. 07: Tuning of machine + SR running • Aug. 07: BESIII detector moved into beam line• Sept. 07 : Starting machine-detector tuning. • Physics run by Autumn 2007

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Middle and Long Term Plan of IHEPMiddle and Long Term Plan of IHEP Chinese Government organizes a national wide effort to

make middle and long term plan for Science and technology.

IHEP is interested in several fields, specially for• Particle physics, • Particle Astrophysics• Accelerator technology• Synchrotron Radiation and applications• Big science facilities Taking the advantage of BSRF and other facilities, IHE

P should extent research fields to protein structure, nano-science , material science…

→ Multiple Sciences Research Center

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Possible projects for Middle term Possible projects for Middle term • Charm physics @ BEPCII • Modulated hard X-ray telescope satellite• Neutrino experiments:

– Daya Bay Reactor neutrino to measure sin2213 – National underground Lab.– Very LBL oscillation experiment: J-Prac→ Beijing

• High power proton Accelerator: – Chinese Spallation Neutron Source 100KW→200 KW– Accelerator Driven Subcritical system

• Hard X-ray FEL• Convert BEPC into dedicated SR source after

BEPCII finished physics running

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Parameterization of neutrino mixing

6 fundamental parameters in neutrino physics ： Known ： | m2

32|,sin2232 ， m221,sin2221

Unknown: sin22 ， , sign of m232

Exp. ： reactor VLBL oscillation

Daya Bay Reactor J-Parc → Beijing

Neutrino mixing parameters

U 1 0 0

0 cos23 sin23

0 sin23 cos23

cos13 0 e i sin13

0 1 0

e i sin13 0 cos13

cos12 sin12 0

sin12 cos12 0

0 0 1

e

Ue1 Ue2 Ue3U1 U2 U3

U1 U2 U 3

1

2

3

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3535大亚湾与岭澳核电站大亚湾与岭澳核电站

大亚湾核电站大亚湾核电站 岭澳核电站岭澳核电站

Dayabay Nuclear Power StationDayabay Nuclear Power Station

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√√

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VLBL Experiment of J-PARC to Beijing

• V LBL experiment with 2000 - 4000 km is very interesting to study many important physics:– Sign of the difference of mass square– τappearance – CP violation of

• V LBL experiment from JHF to Beijing– Good tunnel: 20 km north of Beijing, near highway

to Great Wall – The tunnel is 560 m long, 34 meter wide, 13 meter

height , 150 m rock on top– Good infrastructure available– 2200 km to JHF with 9.5o dip angle

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Thanks !