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Collectivity makes the world go around Kai Schweda Physikalisches Institut University of Heidelberg / GSI Darmstadt 3/15/13 Hans Georg Ritter Symposium Slide 2 RNC group in 2001 Ian Johnson Fabrice Retiere Art Poskanzer Nu Xu student from South Africa David Hardtke Peter Jacobs Jay Marx Howard Wieman Jim Thomas 3/15/131/5 Jennifer Klay Jinghua Fu Eugene Yamamoto Masashi Kaneta Falk Meissner Hans Georg Howard Matis Kirill Filimonov me Grazyna Odyniec Slide 3 on top of the world Hans Georg Slide 4 high-energy nucleus-nucleus collisions Slide 5 central collision collision happens here size ~10fm 4000 charged particles illuminates TPC volume size ~4m Slide 6 STAR year 2 data 3/15/135/24 White papers - STAR: Nucl. Phys. A757, p102. Hans Georg Ritter Symposium Slide 7 Collectivity observed in spectra 3/15/136/24 STAR: Phys. Rev. C70, 041901(R). strongly curved strong flow exponential no flow Hans Georg Ritter Symposium More central collisions Slide 8 matter flows - collectivity 3/15/137/24 STAR Data: Nucl. Phys. A757, (2005) 102. Nu Xu plot 2.0 strange matter flows bulk matter flows partonic collectivity ? Hans Georg Ritter Symposium Slide 9 Anisotropy Parameter v 2 y x pypy pxpx coordinate-space-anisotropy momentum-space-anisotropy Initial/final conditions, EoS, degrees of freedom Slide 10 discovery of partonic collectivity 9/24 PHENIX, PRL 98, 162301 (2007) STAR, PRL 95, 122301 (2005) S. Voloshin, QM02, 379c (2003) elliptic flow of (multi-) strange and and quark number scaling: first observed in and K 0 S PhD theses of Jinghua Fu, Wuhan/LBNL and Paul Sorensen, UCLA/LBNL partonic collectivity STAR, PRC 75, 054906 (2007) STAR, PRL 95, 122301 (2005) Slide 11 higher harmonics 3/15/13Hans Georg Ritter Symposium10/24 extract power spectrum of v n, like WMAP* higher harmonics odd harmonics important v 3 : access /s STAR, arXiv:1301.2187 [nucl-ex]; STAR, PRL 92 (2004) 062301; A.Mocsy and P. Sorensen, NPA 855 (2011) 241; B. Alver and G. Roland, PRC 81 (2010) 054904; *WMAP data: The NASA/WMAP Science team; http://map.gsfc.nasa.gov/media/080997/index.htmlhttp://map.gsfc.nasa.gov/media/080997/index.html. QGP plot: B. Schenke, S. Jeon, and C. Gale, arXiV:1109.6289. Slide 12 everything counts in large amounts 3/15/1311/24Hans Georg Ritter Symposium M. Sumbera, arXiv:1301.7224 [nucl-ex]. Slide 13 entering the anti-world 3/15/1312/24Hans Georg Ritter Symposium anti-alpha discovered rarest signal in HI ever observed (2/10 8 ) STAR, Nature 473 (2011) 353. Slide 14 STAR: key to success 3/15/13Hans Georg Ritter Symposium13/24 large data sets large acceptance low-p T coverage excellent PID Hans Georg Slide 15 Go heavy or go home ! 3/15/13Hans Georg Ritter Symposium14/24 X. Zhu, M. Bleicher, S.L. Huang, K.S., H. Stcker, N. Xu, and P. Zhuang, PLB 647 (2007) 366. new scale: m c,b QCD m c,b const. m u,d,s const. Slide 16 Where does all the charm go ? Total charm cross section: open-charmed hadrons, e.g. D 0, D +, D* +, c, and c,b e() + X Quarkonia, e.g. J/ carries 1% of total charm 3/15/13Hans Georg Ritter Symposium15/24 D0D0 DD DsDs cc J/(charmonium) D *+ Slide 17 Open-charm production 3/15/13Hans Georg Ritter Symposium16/24 at RHIC: large combinatorial background PhD thesis Xin Dong USTC/LBNL STAR upgrade with Heavy Flavor Tracker will impose high precision STAR, PRD 85 (2012) 092010; ALICE, JHEP 1207 (212) 191. Slide 18 Heavy-quark detection 3/15/13Hans Georg Ritter Symposium17/24 golden channel: D 0 K - + , c = 123 m displaced decay vertex is signature of heavy-quark decay plot: courtesy of D. Tlusty. Slide 19 Heavy Flavor Tracker 3/15/1318/5 SSD IST PXL HFT Hans Georg Ritter Symposium Slide 20 The Heavy Flavor Tracker for STAR Hans Georg with an HFT prototype 10 m precision demonstrated 10 weeks of running in 2014 will decisively address open charm at RHIC Slide 21 some more statistics 3/15/13Hans Georg Ritter Symposium20/24 STAR white paper: Nucl. Phys. A757 (2005) 1021581 - most cited RHIC paper - most cited HI experimental paper Bjorken, PRD 27 (1983) 1272023 Mastsui and Satz, PLB 178 (1986) 4161719 Slide 22 populating the world Slide 23 Dan Cebra Javier Castillo Xin Dong Kirill Filimonov Jinghua Fu Tom Gutierrez Davis CEA LBNL Berkeley Wuhan San Luis Obispo Ian Johnson Masashi Kaneta Jennifer Klay Marco v. Leuween Mike Lisa Spiros Margetis PSI Tohoku San Luis Obispo Utrecht Ohio State Kent State Sevil Salur Rutgers Joakim Nystrand Joern Putschke Fabrice Retiere Lijuan Ruan ks Raymond Snellings Bergen Wayne State Triumf BNL Heidelberg Utrecht Paul Sorensen BNL Fuqiang Wang Purdue Bedangadas Mohanty Bhubaneswar Slide 24 some personal remarks o cultural shock: - flat hierarchies, informal style - took me 6 months to get over it o can you think about charm ? Hans Georg in 2001 o Berkeley style: - people doing the work are getting exposed, i.e. plenary talks, committees, 3/15/13Hans Georg Ritter Symposium Slide 25 Happy 69 Birthday, Hans Georg ! 24/5