Summary of ISMD 07 summary is Zhangbu Xu
Summary of ISMD 07 summary is … Zhangbu Xu (BNL)
Three Ingredients for ISMD 07, LBL, 08/07
n oto on pr ne utr pio n QCD and jet • Peculiar theory of color -k ar qu A n t i -q u a rk n pio ne pr u o t t r o on n – weak at large momentum and short distance – Confined – required energy grows with distance – no FREE quark or gluon, fragment to “jet”– cluster of color-neutral particles – Generate most of the mass of visible world (m=E/c 2) jet LEP at CERN F. Wilczek, H. D. Politzer, and D. J. Gross, 1973; Nobel Prize 2004 ISMD 07, LBL, 08/07
Speed is one of the issues of jet AA at LHC --A. Morsch LBL, and 08/07 Heavy Ion Collisions Important for. ISMD 07, LHC p+p
High-energy jet for PDF/p. QCD N. Coppola B. Mohanty K. Hatakeyama Good agreements with p. QCD, provide further constraints on PDF, as Understanding background to new physics ISMD 07, LBL, 08/07
Small-x CDM/Saturation/CGC T. Ullrich ISMD 07, LBL, 08/07
Eur. Phys. J. C 46 (2006) 27 Forward Jets ZEUS: DESY-07 -102 ZEUS • New measurement ZEUS 98 -00 data: 2 < ηjet < 4. 3 (Fwd. Plug. Cal) – DIS: 20 < Q 2< 100 Ge. V 2 ; 10 -4 < x. Bj < 5 x 10 -3 ; – xjet > 0. 036 Enhance BFKL expected behaviour • LO-DGLAP fails completely • NLO-DGLAP well below data at low x (as seen by H 1) • Color-Dipole Model can describe the data ISMD 07, LBL, 08/07 A. Polini: Multi-jets for small-x
Does CGC describe Diffraction? 1994 data described by --E. Levin Have alternatives been ruled out? New and more precise data -- H. Jung ISMD 07, LBL, 08/07 J/
Future Electron-Ion Collider Study GLUE in Matter – T. Ullrich ISMD 07, LBL, 08/07
Ready to heat up? Initial Condition and a probe Physics Today, Ludlam/Mc. Lerran ISMD 07, LBL, 08/07
Jet Quenching Fundamentals I B. Mohanty, J. Franz E. Wang K. Fialkowski Suppression, Color factor q/g convertion ISMD 07, LBL, 08/07
Jet fundamentals II 200 Ge. V Au+Au & d+Au STAR preliminary 1 _d N_ Ntrig d(D f) 3 8 <p. Ttrig< 15 Ge. V/c STAR Preliminary Au+Au d+Au 2 1 0 -2 -1 0 1 Under specific condition, jets seem to act as unmodified Ridged subtracted, 2+1 jets (J. Bielcikova, O. Barannikova) ISMD 07, LBL, 08/07 Df 2 3 4 5
Jet structure => Flow J+R R J Putschke, QM 06 R. Hwa: Ridgeology J. Bielcikova ridge R Jet J Initial geometry and surface effects create semi-hard partons only perpendicular To surface, energy loss of these partons creates effective v 2 Where does the energy flow of the away-side jet go? ISMD 07, LBL, 08/07
Jet-Medium Coupling What happens to the jets’ lost energy? What part is “heating” the plasma, what part is redistributed into excitations of the medium? 1) Colorful Modes: longitudinal modes => Mach cones J. Ruppert & B. Müller (Phys. Lett. B 618: 123 -130, 2005) transverse modes => Cherenkov (like) radiation I. Dremin, (e. g Nucl. Phys. A 767: 233 -247, 2006), A. Majumder et al. (e. g. Phys. Rev. Lett. 96: 172302, 2006) 2) 2) Colorless (hydrodynamical) mode => Mach cones H. Stöcker et al. (e. g. Nucl. Phys. A 750: 121 -147, 2005), J. Casalderra-Solana et. al. (e. g. Nucl. Phys. A 774: 577 -580, 2006), T. Renk & J. Ruppert (e. g. Phys. Rev. C 73: 011901, (2006)) J. Ruppert, I. Dremin ISMD 07, LBL, 08/07
Is there a structure? Yes, Beam energies (SPS->RHIC) Particles p+p J. Jia, S. Kniege A. Sickles | |<0. 35 0. 1< - CM<0. 7 ISMD 07, LBL, 08/07
Is it a wave? Au+Au Central 0 -12% Triggered Deflected Mach-cone 3 -particle correlation Cone like structure: SPS, RHIC J. Ulery, S. Kniege ISMD 07, LBL, 08/07
Hydrodynamics, not just -meson Just after hadronization b=7. 2 fm Hydro+Cascade b=7. 2 fm T = Tsw = 169 Me. V T. Hinaro in p. T < 1 Ge. V/c Hadronization is just taking a chunk of “matter” and converting into hadron, Constituent Quark Scaling at intermediate p. T? Initial condition from CGC requires softer Eo. S, lower /s (A. Dumitru) Good opportunity to use charm, , and to check theory ISMD 07, LBL, 08/07 TH et al. (in preparation).
Heavy-Hadron flow STAR preliminary Hydro: (T. Hirano) V 2 from early stage Mass ordering in haronic stage Radial flow 50%+50% Ridgeology: (R. Hwa) v 2 from hadronization Radial flow early? ISMD 07, LBL, 08/07
What is v 2 fluctuation? G. Roland, F. Grassi Nice probe of fluctuation if Initial state is understood Energy Scan Identity Crisis: A. STAR and PHOBOS have observed large fluctuations of final state hadron v 2 B. Even Final State hadron v 2 should not contain non-flow components, v 2 should be in the hydrodynamics sense C. How do theorists (Ne. XSPhe. Rio, CGC) define v 2 fluctuation? ISMD 07, LBL, 08/07
What is the signatures of Phase transition? M. Bleicher P. Seyboth R. Lacy: /s ISMD 07, LBL, 08/07
Imaging the source New techniques, exotic correlations A. Kisiel, P. Chung, P. Danielewicz ISMD 07, LBL, 08/07
THE HBT puzzle Sizes depend on EOS/breakup criteria … • Discrapance at 25% level • Viscosity, Inflation and Tsunamis Help Explain HBT Puzzle S. Pratt No THE puzzle any more ISMD 07, LBL, 08/07
New HBT puzzling result Ratio of (Au. Au, Cu. Cu, d. Au) HBT radii by pp M. Lisa pp, d. Au, Cu. Cu - STAR preliminary ISMD 07, LBL, 08/07
p-p, p- p, L- L p-p A. Kisiel D. Muller G. Miller ISMD 07, LBL, 08/07
Look up the SKY for inspiration Milagro HESS ISMD 07, LBL, 08/07 Te. V gamma ray P. Huentemeyer
GZK • Nuclear physics works in SKY! • Understand the sources • g rays as well: A. Weinstein, P. Huentemeyer K. Martens, J. Neto p+g D(1232) p+N p+g p+e++e- ISMD 07, LBL, 08/07
Saturation at VHECR? LHC, e. A will help Phys. Rev. Lett. 94: 231801, 2005 ISMD 07, LBL, 08/07 G. Farrar, J. Neto, H. Weigert K. Martens,
Do we have the same (troubling) charm? NA 60 H. Woehri and C. Lourenco, Phys. Rep. 433 (2006) 127 -180 X. Dong, G. Farrar et al. ISMD 07, LBL, 08/07
Predictions by experimentists 6. 4 = RHICx 1. 6 6 Multiplicity HBT Flow 5 M. Lisa T. Humanic K. Schweda 1000 5. 5 Te. V PHOBOS White Paper: NPA 757, 28 R. Lacy: /s (D. Kharzeev et al. ) ISMD 07, LBL, 08/07
Final Remarks • One distinguished guest George Smoot • One movie Bruno Touschek and the Art of Physics • One BBQ • Two Ad. S/CFT Correspondences (Pomeron Graviton, T BH) • 76 talks • Many future projects (RHIC II, LHC, EIC, TA/TALE, HAWC, ARIANNA) • 5 days of physics – PRICELESS!!! ISMD 07, LBL, 08/07
- Slides: 30