Transcript Slides - Caltech

CEPC-SppC: A Great Opportunity
for the US-China Collaboration
Yifang Wang
Institute of High Energy Physics, Beijing
Washington, Feb. 12, 2016
Introduction
• Our planet is becoming smaller and smaller with
the help of nowadays technology
• International collaboration is a must for everyone,
but there are a lot of complications due to various
reasons
• Scientific collaboration is generally undisputed
• In particular, US-China collaboration on High
Energy Physics(HEP) was very successful because
– Common interests as Human Beings
– Easily visible
– No complications due to national interests, politically
sensitivity, etc.
More than 30 years collaboration
Agreement on HEP signed on Jan. 31, 1979
During 29th meeting in IHEP, Nov. 2008
1st meeting in Beijing, June 10-13, 1979
36th meeting at BNL, Nov 5-6, 2015
BEPC/BES: Starting Point
BESIII US members
Univ. of Hawaii
Carnegie Mellon Univ.
Univ. of Minnesota
Univ. of Rochester
Univ. of Indiana
Great results on
Light Hadron,
Charm and
Charmonium
physics
AMS at the International Space Station
Permanent magnet
Daya Bay Reactor Neutrino Experiment
US members(16)
BNL, Caltech, LBNL, Iowa State Univ.,
Illinois Inst. Tech., Princeton, RPI,
UC-Berkeley, UCLA, Univ. of Cincinnati,
Univ. of Houston, Univ. of Wisconsin,
William & Mary, Virginia Tech.,
Univ. of Illinois-Urbana-Champaign,
Siena
Sin22q13 = 0.092  0.016(stat)  0.005(syst)
c2/NDF = 4.26/4, 5.2 σ for non-zero θ13
A New Era ?
• Scientifically
– After the Higgs, game is over ?
– What is the future of our field ?
ILC only ?
Standard Model Is not Complete
• Hierarchy problem
• Naturalness problem
• Vacuum issues
Evidences Beyond the Standard Model
• Unification at a high energy
• Dark matter, anti-matter, dark
energy
• Neutrinos
Understanding the Higgs
• Coupling properties
• Potential shape ?
• New physics ?
• Politically: Consequences of
China’s economical growth ?
• More investment on Science ?
• More as an international
partner ?
• Continue to “open door” ?
• US & China: more
cooperation or
confrontation ?
Our Proposal: CEPC+SppC
• Thanks to the low mass Higgs, we can build a
Circular Higgs Factory(CEPC), followed by a
proton collider(SppC) in the same tunnel
e+
e-
IP1
LTB
High Energy Booster(7.2Km)
BTC
Medium Energy Booster(4.5Km)
Low Energy Booster(0.4Km)
IP4
IP2
e+ e- Linac
(240m)
Proton Linac
(100m)
BTC
IP3
Great Science
• Electron-positron collider(90, 250, 350 GeV)
– Higgs Factory: Precision study of Higgs(mH, JPC, couplings)
• Similar & complementary to ILC
• Looking for hints of new physics
– Z & W factory: precision test of SM
 ~ 10 better over LHC
~ 10 better over LEP
• Deviation from SM ? Rare decays ?
– Flavor factory: b, c, t and QCD studies
• Proton-proton collider(~100 TeV)
– Directly search for new physics beyond SM
– Precision test of SM
• e.g., h3 & h4 couplings
 ~ 10 better over LHC
Precision measurement + searches:
Complementary with each other !
Why in China ？
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Physics wise，
CEPC+SPPC is ideal
Timing (after BEPCII)
Technological feasibility (experience at BEPC/BEPCII)
Economy  new funding to the community
Large & young population  new blood to the community
Affordable tunnel & infrastructure  still cheap in China now
Money will be used by somebody  It is a pity if we miss it
Too expensive ?
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–
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BEPC cost/4 y/GDP of China in 1984  0.0001
SSC cost/10y/GDP of US in 1992  0.0001
LEP cost/8y/GDP of EU in 1984  0.0002
LHC cost/10y/GDP of EU in 2004  0.0003
ILC cost/8y/GDP of Japan in 2018  0.0002
CEPC cost/6y/GDP of China in 2020  0.0001
SPPC cost/10y/GDP of China in 2036  0.0001- 0.0002
Timeline (dream)
• CPEC
– Pre-study, R&D and preparation work
• Pre-study: 2013-15
– Pre-CDR for R&D funding request
• R&D: 2016-2020
• Engineering Design: 2015-2020
– Construction: 2021-2027
– Data taking: 2028-2035
• SppC
– Pre-study, R&D and preparation work
• Pre-study: 2013-2020
• R&D: 2020-2030
• Engineering Design: 2030-2035
– Construction: 2035-2042
– Data taking: 2042 -
Current Status
• Initiated a global effort for the Conceptual design
• Pre-CDR completed
– No show-stoppers
– Technical challenges identified  R&D issues
– Preliminary cost estimate
• R&D issues identified and funding request underway
– Seed money from IHEP available: 12 M RMB/3 years
– MOST: ~ 100 M / 5yr, hopefully next year
– NCDR: ~1 B RMB / 5 yr, maybe 2017
• Working towards CDR by 2016
– A working machine on paper
• Site selection
• Internationalization & organization
Can be downloaded from
http://cepc.ihep.ac.cn/preCDR/volume.html
403 pages, 480 authors
328 pages, 300 authors
March 30, 2015
International Review of Pre-CDR
March 30, 2015
A Candidate Site
Qinhuangdao
Beidaihe
Beijing
Tianjing
• 300 km from Beijing
• 3 h by car
• 1 h by train
International Collaboration
• Why we need international collaboration ?
–
–
Not only because we need technical help
But also for financial & political support in China
•
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To integrate China better to the international community
To modernize China’s research system(“open door”)
• A new scheme of international collaboration, different from
ITER, ILC, CERN, …
• An international advisory board is formed
• A machine of the community, and for the community
• A “Center for Future HEP” is established to initiate
internationalization
Summary
• Scientific collaboration is great for our society
• CEPC-SppC is an unique opportunity
• US-China collaboration may play a special role
for CEPC, and CEPC will play a special role for
the US-China cooperation.
• Let’s be optimistic for the promising future
Even if the future new accelerator is not in China, it is
still very good to the Chinese HEP & Science community.
We fully support a global effort