KEK Theory Center Workshop “Hadron and Nuclear Physics in...
Transcript of KEK Theory Center Workshop “Hadron and Nuclear Physics in...
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KEK Theory Center Workshop “Hadron and Nuclear Physics in 2017”, 2017/1/9, KEK
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High-power Proton Beam
Proton
T2K(Tokai-to-Kaminoka) Hadron physics etc…
KEK
Tokyo
NagoyaNarita
J-PARC
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Proton
J-PARC-HI = J-PARC Heavy-Ion Program
Dense Medium Rare events• QCD phase diagram• 1st order transition• Equation of state
• Hypernuclei• Exotic hadrons• Hadron interaction
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Proton
J-PARC-HI = J-PARC Heavy-Ion Program
Beam energy: ~20GeV/A (√s~6.2GeV) High luminosity: collision rate ~108Hz Fixed target experiment Launch: (hopefully) 2025~
White paper / Letter of Intent (2016) http://asrc.jaea.go.jp/soshiki/gr/hadron/jparc-hi/
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Heavy-Ion Collisions
AGS-1996
~2010History of HIC = increasing energy
2010~Beam-energy scanLow-energy exp.
SPS1994-2000
RHIC2000-
LHC2010-
creation of quark-gluon plasma,strongly-interacting QGP
RHIC-BES2010-
FAIR2022-?
NICA2025-?
J-PARC-HI2025~?
2-6.2 GeV
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AGSSPS
J-PARC-HI J-PARC-HI:High-luminosity X Fixed targetWorld highest rate~108Hz
5-order higher than AGS,SPS
AGS, SPS1 year
J-PARC-HI5 min.
=
High-statistical exp. various event selections higher order correlations search of rare events
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RCS & Main Ringstable
well established
New HI Injectorhigh intensity
J-PARC Heavy IonSpectrometer
Use of reliable / high-performance RCS & main ringReduce cost and time
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Exploring Dense Medium
Rare-event Factory
• QCD phase diagram• 1st order phase transition• equation of state
• hyper nuclei• exotic hadrons• hadron interaction
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High energy
Nuclear transparency
net-baryon #: small
Low energy
Baryon stopping
net-baryon #: large
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rapidity
transparency
stopping
rapidity dep. of net-proton #
Baryons stop at collision point
Baryons pass through
phase diagram from J-PARC White Paper
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T, m from particle yield
STAR,2012
Translation to baryon density
J-PARC energy = highest baryon density
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Time evolution in T-r plane by JAM
A. Ohnishi, 2002
Maximum density 5~10r0 @ J-PARC energy Large event-by-event fluctuations?
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creation of QGP hydro. models early thermalization (boost invariance)
RHIC / LHC
Thermalization Hydrodynamics CascadeRHIC/LHC:
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creation of QGP hydro. models early thermalization (boost invariance)
RHIC / LHC
HydrodynamicsCascadeJ-PARC:
Initial condition? Thresholod of QGP formation “Integrated” approach
- Hydro x Cascade
Low-E Collisions
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Controlling EOS by changing interaction in cascade
cascade + hydro + cascade
3-fluid dynamics
PHSD + chiral restoration
Chiral fluid
JAM/ Nara, Ohnishi, Stoecker, 2016-
UrQMD/ Petersen; SteinheimerKarpenko+, 2016-
Cassing+, 2016; Palmese+, 2016
THESEUS/ Blaschke, Ivanov, +, 2016
Dumitru+; Nahrgang+, 2014-; Song+, 2016-
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Dilepton / photon Fluctuations, higher-order cumulants X, W, …
Sophisticated event selections Various correlations
Can we selectthese events??MK, Sakaguchi, Sako,Nara, Ohnishi, …
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photons
gravitational wave
EM probes
hadronic observables
Time scale: 10-1s
time scale: 10-22s
di-lepton yield
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Is the signal of QCD-CP indicated in fluctuation observables??
Careful theor./exp. analyses are needed!Non-eq. effects / rapidity dependences / experimental cuts / etc.
Asakawa, MK, Prog. Part. Nucl. Phys. (2016)
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Exploring Dense Medium
Rare-event Factory
• QCD phase diagram• 1st order phase transition• equation of state
• hyper nuclei• exotic hadrons• hadron interaction
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High density High luminosity High strange yield
ExoticHadrons
Hypernuclei
Strangelets
hadronInteraction
Rare-eventFactory
creation properties interaction
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Particle yield in thermal model
Accessible@ J-PARC
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Particle yield in thermal modelhas a maximum around J-PARC energy
Experimentalsetting for hypernuclerphysics
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Negatively-charged hypernuclei (X-n, X-nn, …)Nuclear strangeletsn-rich / p-rich hypernuclei
Measurement of magnetic moments
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ExHIC Collaboration, 2012
or
Particle yields
Structure of Hadrons
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Morita, Furumoto, Ohnishi, 2015
STAR,2015
LL Correlation function
Hadron interaction can be studied from correlation function.
emission sourcefunc.
relativewave func.+
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June 2016July 2016Aug. 2016Sep. 2016
White Paper uploadedSubmission of LOIInternational WorkshopSymposium @ JPS meeting
Funding request to MEXTEarliest approval of funding Construction of HI InjectorConstruction of HI injection system in RCSConstruction of HI spectrometerFirst collision
202020212021-20222021-20232023-20242025
Recent activities:
Future plan:Visit J-PARC-HI Web Page
http://asrc.jaea.go.jp/soshiki/gr/hadron/jparc-hi/
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Dense medium Rare events
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Directed Flow:
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Directed Flow:
dv1/dy: two sign change No transport models can reproduce
it quantitatively
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collision rateLH
CR
HIC
-BES
SPS
AG
S
NIC
A
FAIR
RH
IC
J-PA
RC
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