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PHENIX HIGHLIGHTS Stefan Bathe, QM2011. Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 2 TiTi  /s/s dE/dx CNM effects ConditionsProperties.

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Presentation on theme: "PHENIX HIGHLIGHTS Stefan Bathe, QM2011. Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 2 TiTi  /s/s dE/dx CNM effects ConditionsProperties."— Presentation transcript:

1 PHENIX HIGHLIGHTS Stefan Bathe, QM2011

2 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 2 TiTi  /s/s dE/dx CNM effects ConditionsProperties Screening length Initial State

3 What I will show you today Stefan Bathe for PHENIX, QM2011 3  v 2 of thermal direct photons  Constrains T i and  0  CNM effects in d+Au  Density dependence of shadowing from J/   Reconstructed jets  Low-x suppression from forward di-hadron correlations v3v3  Disentangle initial state from  /s  Implications for 2-particle correlations  E loss  Path-length dependence  Results from energy scan

4 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 4 TiTi  ~ 0 /s/s dE/dx CNM effects ConditionsProperties Screening length Initial State

5 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 5 TiTi  ~ 0 /s/s dE/dx CNM effects ConditionsProperties Screening length Initial State

6 Direct Photon Excess in Au+Au Stefan Bathe for PHENIX, QM2011 6 √s NN = 200 GeV NLO Vogelsang yield p+p PRL 104, 132301 (2010)

7 Direct Photon Excess in Au+Au Stefan Bathe for PHENIX, QM2011 7  Direct photon excess above p+p spectrum  Exponential (consistent with thermal)  Inverse slope = 220 ± 20 MeV  T i from hydro  300... 600 MeV  Depending on thermalization time Au+Au min. bias √s NN = 200 GeV p+p NLO Vogelsang yield PRL 104, 132301 (2010)

8 Critical d+Au Check Stefan Bathe for PHENIX, QM2011 8  New:  no exponential excess in d+Au Poster: Y. Yamaguchi

9 Direct photon v 2 further constrains T i Stefan Bathe for PHENIX, QM2011 9 Chatterjee, Srivastava PRC79, 021901 (2009) Hydro after  0  expected v 2 :  prompt photons: 0 (time zero)  thermal photons small (flow not built up) large (like hadrons) earlylate

10 Stefan Bathe for PHENIX, QM2011 10 Direct Photon v 2 Statistical subtraction inclusive photon v 2 - decay photon v 2 = direct photon v 2 inclusive photon v 2 Au+Au@200 GeV minimum bias preliminary

11 Stefan Bathe for PHENIX, QM2011 11 Direct Photon v 2 inclusive photon v 2 Au+Au@200 GeV minimum bias 0 v20 v2   0 v 2 similar to inclusive photon v 2  Two possibilities  A: there are no direct photons  B: direct photon v 2 similar to inclusive photon v 2  Key: precise measurement of direct photon excess preliminary

12 Stefan Bathe for PHENIX, QM2011 12 Direct Photon v 2 Au+Au@200 GeV minimum bias Direct photon v 2  direct photon v 2 large (~15 %) at p T =2.5 GeV  v 2  0 where prompt photons dominate preliminary

13 Theory Comparison: Direct Photon v 2 Stefan Bathe for PHENIX, QM2011 13 Plenary: S. Esumi (flow), Tue Parallel: E. Kistenev (direct photons) Thu Theory calculation: Holopainen, Räsänen, Eskola arXiv:1104.5371v1  Models under-predict direct photon v 2  Measurement further constrains T i and  i  Challenge to theorists preliminary

14 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 14  ~ 0 /s/s dE/dx CNM effects ConditionsProperties Screening length Initial State T i =300-600 MeV

15 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 15  ~ 0 /s/s dE/dx CNM effects ConditionsProperties Screening length Initial State T i =300-600 MeV

16 Cold Nuclear Matter Effects Stefan Bathe for PHENIX, QM2011 16  Important for interpretation of HI data  Measure Cold Nuclear Matter (CNM) effects in d+Au collisions  RHIC versatile  Can collide any nuclear species on any other

17 J/  in d+Au: Shadowing non-linear Stefan Bathe for PHENIX, QM2011 17  EPS09 shadowing with linear dependence on nuclear thickness matches for central collisions  Overpredicts suppression for peripheral collisions  R CP shows this clearly  Thickness (impact parameter) dependence of shadowing is non-linear! 1010.1246 arXiv:1010.1246 Theory calculations: Eskola, Paukkunen, Salgado, JHEP04, 065 Vogt, PRC71, 054902 Kharzeev, Tuchin, NPA770, 40 Kharzeev,Tuchin, NPA735, 248 Plenary: C. Luiz da Silva (heavy flavor), Fri Parallel: A. Sen (quarkonia) Tue

18 Reconstructed Jets in d+Au Stefan Bathe for PHENIX, QM2011 18

19 19 at the p+p uncorrected scale Jet R cp in central d+Au modified - caution: this is not R dA ! - consistent with  0 R cp - anti-shadowing? Reconstructed Jets in d+Au Parallel: N. Grau (gamma-hadron, jets) Tue Poster: D. Perepelitsa (jets in dAu)

20 Stefan Bathe for PHENIX, QM2011 20 Pocket formula: new forward EM calorimeter  = 3.0-3.8 Forward di-hadron correlations Color Glass Condensate?

21 Stefan Bathe for PHENIX, QM2011 21 peripheral central Di-hadron suppression factor smaller x Initial state low-x gluon suppression

22 Stefan Bathe for PHENIX, QM2011 22  Di-hadrons suppressed at low x  Important for interpretation of HI results peripheral central Di-hadron suppression factor Parallel: M. Chiu (small x dAu correl) Thu Poster: Z. Citron (small x dAu correlations) smaller x

23 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 23  ~ 0 /s/s dE/dx ConditionsProperties Screening length Initial State T i =300-600 MeV non-linear shadowing low-x suppression anti-shadowing? CNM effects

24 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 24  ~ 0 /s/s dE/dx ConditionsProperties Screening length Initial State T i =300-600 MeV non-linear shadowing low-x suppression anti-shadowing? CNM effects

25 Initial State determines flow strength Stefan Bathe for PHENIX, QM2011 25 Glauber CGC Radial gluon distribution 2-D density profile Smaller eccentricitylarger eccentricity Initial state determines v 2 strength (largest uncertainty) Disentangle initial conditions from flow strength

26 v 3 has fluctuations origin Stefan Bathe for PHENIX, QM2011 26 central: v 3 = v 2 mid-central: v 3 < v 2 arXiv:1105.3928 weak centrality dependence of v 3 => fluctuations origin

27 v 3 disentangles initial state and  /s Stefan Bathe for PHENIX, QM2011 27  Glauber Glauber initial state  /s = 1/4   KLN CGC initial state  /s = 2/4  v 2 described by Glauber and CGC Two models arXiv:1105.3928 Theory calculation: Alver et al. PRC82,034913

28 v 3 disentangles initial state and  /s Stefan Bathe for PHENIX, QM2011 28  Glauber Glauber initial state  /s = 1/4   MC-KLN CGC initial state  /s = 2/4  v 2 described by Glauber and CGC v 3 described only by Glauber Two models arXiv:1105.3928 Theory calculation: Alver et al. PRC82,034913 Theory calculation: Alver et al. PRC82,034913 Lappi, Venugopalan, PRC74, 054905 Drescher, Nara, PRC76, 041903

29 v 3 disentangles initial state and  /s Stefan Bathe for PHENIX, QM2011 29  Glauber Glauber initial state  /s = 1/4   MC-KLN CGC initial state  /s = 2/4  v 2 described by Glauber and CGC v 3 described only by Glauber Two models arXiv:1105.3928 Theory calculation: Alver et al. PRC82,034913 Theory calculation: Alver et al. PRC82,034913 Plenary: S. Esumi, Tue Parallel: R. Lacey (v3, jet shape) Mon favored Lappi, Venugopalan, PRC74, 054905 Drescher, Nara, PRC76, 041903

30 v 3 explains double-hump Stefan Bathe for PHENIX, QM2011 30 correction  v 2 correction only  double-hump

31 Stefan Bathe for PHENIX, QM2011 31 correction  v 2, v 3, v 4 correction  double-hump disappeared  Peak still broadened  v 2 correction only  double-hump v 3 explains double-hump Plenary: S. Esumi, Tue Parallel: R. Lacey (v3, jet shape) Mon

32 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 32  ~ 0  /s  1/4  dE/dx ConditionsProperties Screening length T i =300-600 MeV ? Initial State  Glauber ? ? non-linear shadowing low-x suppression anti-shadowing? CNM effects

33 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 33  ~ 0  /s  1/4  dE/dx ConditionsProperties Screening length T i =300-600 MeV Initial State  Glauber ? non-linear shadowing low-x suppression anti-shadowing? CNM effects

34 Path-length dependence of E loss 34 PRL 105, 142301 pQCD AdS/CFT v 2 not explained by pQCD (even with fluctuations & saturation) R AA explained by both models Theory calculations: Wicks et al., NPA784, 426 Marquet, Renk, PLB685, 270 Drees, Feng, Jia, PRC71, 034909 Jia, Wei, arXiv:1005.0645

35 Path-length dependence of E loss 35 PRL 105, 142301 pQCD AdS/CFT v 2 not explained by pQCD (even with fluctuations & saturation) V2 explained by cubic path length dependence (AdS/CFT) R AA explained by both models Theory calculations: Wicks et al., NPA784, 426 Marquet, Renk, PLB685, 270 Drees, Feng, Jia, PRC71, 034909 Jia, Wei, arXiv:1005.0645

36 Path-length dependence of E loss 36 PRL 105, 142301 pQCD AdS/CFT v 2 not explained by pQCD (even with fluctuations & saturation) R AA explained by both models Theory calculations: Wicks et al., NPA784, 426 Marquet, Renk, PLB685, 270 Drees, Feng, Jia, PRC71, 034909 Jia, Wei, arXiv:1005.0645 v 2 explained by cubic path length dependence (like AdS/CFT)

37 Path-length dependence of E loss 37 PRL 105, 142301 pQCD AdS/CFT v 2 not explained by pQCD (even with fluctuations & saturation) R AA explained by both models Theory calculations: Wicks et al., NPA784, 426 Marquet, Renk, PLB685, 270 Drees, Feng, Jia, PRC71, 034909 Jia, Wei, arXiv:1005.0645 Plenary: M. Purschke (R_AA) Wen Parallel: N. Grau (gamma-hadron, jets) Tue Parallel: D. Sharma (light vector mesons) Mon Poster: M. Tannenbaum (E loss RHIC vs. LHC) v 2 explained by cubic path length dependence (like AdS/CFT) v 2 data favors dE/dx ~ l 3 (like AdS/CFT)

38  -h: fragmentation function in Au+Au Stefan Bathe for PHENIX, QM2011 38  p+p consistent with e + +e -  Au+Au consistent with E loss model Tasso: Braunschweig et al., Z. Phys. 320 C47, 187 MLA: Borghini, Wiedemann, hep-ph/0506218 Parallel: N. Grau (gamma-hadron, jets) Tue Poster: M. Tannenbaum (E loss RHIC vs. LHC)  hadrons

39 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 39  ~ 0 dE/dx  l 3 ConditionsProperties Screening length T i =300-600 MeV  /s  1/4  Initial State  Glauber ? ? non-linear shadowing low-x suppression anti-shadowing? CNM effects

40 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 40  ~ 0 dE/dx  l 3 ConditionsProperties Screening length T i =300-600 MeV  /s  1/4  Initial State  Glauber ? ? non-linear shadowing low-x suppression anti-shadowing? CNM effects

41 v 2, v 3, v 4 independence of  s NN (for 39, 62, 200 GeV) Stefan Bathe for PHENIX, QM2011 41 v 2, v 3, v 4 independence of  s NN for 39, 62.4, 200 GeV Just like at 200 GeV, disentangle initial state and  /s

42 v 2 saturation with  s NN Stefan Bathe for PHENIX, QM2011 42 Need updated plot from Arkadij [PHENIX] Phys.Rev.Lett.94:232302,2005 Preliminary, STAR, PHENIX and E895 data 10 3 10 4 ALICE v 2 saturation 39 GeV Plenary: S. Esumi, Tue Parallel: R. Lacey (v3, jet shape) Mon Parallel: X. Gong (energy scan: bulk) Fri Poster: S. Mizuno (PID v3) p T = 1.7 GeV p T = 0.7 GeV

43  s NN dependence of energy loss Stefan Bathe for PHENIX, QM2011 43 PRL101, 232301 preliminary  R AA suppressed also at 39 GeV  R AA at 62 GeV approaches 200 GeV level at high p T Plenary: M. Purschke (R_AA) Wen Parallel: N. Novitsky (energy scan) Fri Poster: O. Chvala (RAA in 39 and 62 GeV)

44 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 44  ~ 0 dE/dx  l 3 ConditionsProperties Screening length T i =300-600 MeV  /s  1/4  Initial State  Glauber ? ? non-linear shadowing low-x suppression anti-shadowing? CNM effects

45 Near-Term Future: Silicon Vertex Detector Stefan Bathe for PHENIX, QM2011 45  VTX successfully commissioned in 2011 p+p run  VTX taking data in Au+Au now!  R AA of c, b separately  v 2 of c, b separately  Jet tomography (di-hadron,  -h, c-h, c-c)  ~ 100  m Status Physics beam profile Data: p+p@500 GeV, 2011 -

46 Near-Term Future: Silicon Vertex Detector 46  ~ 100  m Status Physics beam profile Data: Au+Au@200 GeV, 2011  VTX successfully commissioned in 2011 p+p run  VTX taking data in Au+Au now!  R AA of c, b separately  v 2 of c, b separately  Jet tomography (di-hadron,  -h, c-h, c-c) - Stefan Bathe for PHENIX, QM2011 Parallel: A. Sickles (Decadal Plan) Thu Poster: M. Chiu (Fast TOF, 10 ps) Poster: M. Kurosawa (VTX (pixel)) Poster: T.Hachiya (VTX (pixel)) Poster: R. Akimoto (VTX (pixel))

47 What I could not cover in this talk 47  T i  Plenary: S. Esumi, Tue  Parallel: E. Kistenev (direct photons) Thu  Poster: Y. Yamaguchi (direct photons dAu)  v 3, jet shape,  /s  Plenary: S. Esumi, Tue  Parallel: R. Lacey (v3, jet shape) Mon  Parallel: X. Gong (energy scan: bulk) Fri  Poster: S. Mizuno (PID v3)  Chiral Symmetry  Parallel: M. Makek (Results from HBD) Thu  Heavy Flavor  Plenary: C. Luiz da Silva, Fri  Parallel: A. Sen (quarkonia) Tue  Parallel: M. Durham (open heavy flavor) Fri  Poster: S. Whitaker (Upsilon RAA)  Poster: A. Takahara (J/psi photoproduction)  Poster: H. Thewman (high p T single e in p+p)  Energy Loss  Plenary: M. Purschke (R_AA) Wen  Parallel: N. Grau (gamma-hadron, jets) Tue  Parallel: N. Novitsky (energy scan) Fri  Parallel: D. Sharma (light vector mesons) Mon  Poster: M. Tannenbaum (E loss RHIC vs. LHC)  Poster: O. Chvala (RAA in 39 and 62 GeV)  Parallel: D. Sharma (light vector mesons) Mon  Cold nuclear matter  Parallel: M. Chiu (small x dAu correl) Thu  Parallel: J. Kamin (dAu dileptons) Fri  Poster: Z. Citron (small x dAu correlations)  Poster: D. Perepelitsa (jets in dAu)  Future  Parallel: A. Sickles (Decadal Plan) Thu  Poster: M. Chiu (Fast TOF, 10 ps)  Poster: M. Kurosawa (VTX (pixel))  Poster: T.Hachiya (VTX (pixel))  Poster: R. Akimoto (VTX (pixel))

48 Conclusions Stefan Bathe for PHENIX, QM2011 48  v 2 of thermal direct photons large  Further constrains T i and  0  CNM effects in d+Au  Non-linear density dependence of shadowing from J/   Reconstructed jet R cp modified  Low-x suppression from forward di-hadron correlations  v 3  Disentangle initial state from  /s  Double-hump disappears in 2-particle correlations  Energy loss  Cubic path-length dependence  Energy Scan  v 2 saturation 39 GeV  R AA suppressed also at 39 GeV Thank you!

49 Backup Stefan Bathe for PHENIX, QM2011 49

50 Jet-  0 comparison d+Au Stefan Bathe for PHENIX, QM2011 50   0 R cp calculated from published R dA  Consistent in overlapping p T range

51 Confirmation from d+Au and Cu+Cu Stefan Bathe for PHENIX, QM2011 51  Fraction of direct photons compared to pQCD No excess in d+Au (no medium) Excess also in Cu+Cu

52 Inclusive Photon v 2 Stefan Bathe for PHENIX, QM2011 52  Measured with EMCal  Issue:  Hadronic contamination at low pT Hadrons deposit only fraction of energy depends on hadron species Difficult to estimate  Confirmed with external conversion  No hadronic contamination EMCal External conversions

53 Direct photon excess R  Stefan Bathe for PHENIX, QM2011 53  Key to this analysis  Precise measurement of R  through internal conversion  20 % direct photon fraction  => direct photon similar to inclusive photon v 2 (or  0 v 2 )

54 Correlations at Forward Rapidity Stefan Bathe for PHENIX, QM2011 54 Pocket formula: JdA=RdA*IdA  J dA suppressed in central d+Au  Caveat:  Double parton interactions (DPI) enhanced in d+Au may be dominant process for large forward rapidity (rather than 2->2 process) M. Strikman and W. Vogelsang, arXiv:1009.6123  Then xfrag not sensitive to rapidity

55 Direct photon flow calculation Stefan Bathe for PHENIX, QM2011 55 30-35 % most central Au+Au@200 GeV upper curve: m q =0.1 GeV lower curve: m q =0.3 GeV thermal +prompt thermal only Hadrons PHENIX PRL98, 162301 V. Pantuev, arXiv:1105.NNNN -expanding fireball in longitudinal and radial direction - photons are produced from matter which flows - Doppler

56 T i from hydro Stefan Bathe for PHENIX, QM2011 56 Phys. Rev. C 81, 034911 (2010) Theory calculations: d’Enterria, Peressounko, EPJ46, 451 Huovinen, Ruuskanen, Rasanen, PLB535, 109 Srivastava, Sinha, PRC 64, 034902 Turbide, Rapp, Gale, PRC69, 014903 Liu et al., PRC79, 014905 Alam et al., PRC63, 021901(R)  T i from hydro  300... 600 MeV  Depends on thermalization time,  0  anti-correlation: T i   0

57 What is the initial Temperature, T i ? Stefan Bathe for PHENIX, QM2011 57  integrate over space-time evolution  Early photons  large temperature large inverse slope  Late photons  Low temperature, but large velocity boost also large inverse slope  => need model for quantitative answer time figures: K. Mendoza, U. Colorado with boost w/o boost

58 Measuring the Properties of the QGP Stefan Bathe for PHENIX, QM2011 58  ~ 0 /s/s dE/dx CNM effects ConditionsProperties Screening length Initial State T i =300-600 MeV

59 Factorizing initial state and viscosity Stefan Bathe for PHENIX, QM2011 59  v 2 described by both models  Glauber Glauber initial state  /s = 1/4   KLN CGS initial state  /s = 2/4   v 3 described by only one model  Glauber Glauber initial state  /s = 1/4  Data: PHENIX, arXiv: Models: B. Alver et al., Phys. Rev. C82, 034913 (2010). B. Schenke et al., Phys. Rev. Lett. 106, 042301 (2011). H. Petersen et al., Phys. Rev. C82, 041901 (2010). S. A. Bass et al., Prog. Part. Nucl. Phys. 41, 255 (1998). M. Bleicher et al., J. Phys. G25, 1859 (1999). ]G.-L. e. a. Ma (2010), 1011.5249.

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