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La frontière de haute energe en collisions noyau-noyau Federico Antinori INFN, Padoue, Italie.

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Presentation on theme: "La frontière de haute energe en collisions noyau-noyau Federico Antinori INFN, Padoue, Italie."— Presentation transcript:

1 La frontière de haute energe en collisions noyau-noyau Federico Antinori INFN, Padoue, Italie

2 The High Energy Frontier of AA Federico Antinori INFN, Padua, Italy

3 Intro my charge: perspective on high energy AA frontier in the aftermath of QM2011 –high energy = top RHIC and upwards disclaimers: –you will get my own biased (and immediate) perspective but with a little help from my friends… –I had to make hard decisions on what to show… I had to leave out many beautiful measurements and important details… –I will mostly reuse slides presented at this conference Federico Antinori - QM2011 - Annecy 3

4 Contents The bulk Correlations Quarkonia High p T Suppression Identified Particles Jets Heavy Flavour Federico Antinori - QM2011 - Annecy 4

5 Le Bulk

6 Federico Antinori - QM2011 - Annecy 6 Alberica Toia - ALICE

7 Federico Antinori - QM2011 - Annecy 7 Peter Steinberg – ATLAS

8 Federico Antinori - QM2011 - Annecy 8 Constantin Loizides – ALICE

9 Federico Antinori - QM2011 - Annecy 9 Adam Kisiel – ALICE (HBT)

10 La frontière explore forward rapidities –multiplicities vs η –CGC/saturation effects? –pA !! identified particle HBT Federico Antinori - QM2011 - Annecy 10

11 Les corrélations Federico Antinori - QM2011 - Annecy 11

12 Federico Antinori - QM2011 - Annecy 12 Raimond Snellings – ALICE

13 Federico Antinori - QM2011 - Annecy 13 same hydro? Raimond Snellings – ALICE

14 Federico Antinori - QM2011 - Annecy 14 Jiangyong Jia – ATLAS

15 Federico Antinori - QM2011 - Annecy 15 Matthew Luzum

16 Federico Antinori - QM2011 - Annecy 16 Matthew Luzum

17 Federico Antinori - QM2011 - Annecy 17 Matthew Luzum

18 Federico Antinori - QM2011 - Annecy 18 weaker centrality dependence than v2 no correlation wrt reaction plane Raimond Snellings – ALICE

19 Federico Antinori - QM2011 - Annecy 19 Andrew Adare – ALICE

20 Federico Antinori - QM2011 - Annecy 20 Jiangyong Jia – ATLAS

21 Federico Antinori - QM2011 - Annecy 21 Andrew Adare – ALICE

22 Federico Antinori - QM2011 - Annecy 22 Jiangyong Jia – ATLAS

23 Federico Antinori - QM2011 - Annecy 23 Wei Li – CMS

24 Federico Antinori - QM2011 - Annecy 24 ShinIchi Esumi – PHENIX

25 Federico Antinori - QM2011 - Annecy 25 Paul Sorensen – STAR

26 Death of ridge and cone? le ridge and le Mach cone seem to be in serious trouble… Le Roi est mort…? … vive le Roi ! la symphonie des corrélations… Federico Antinori - QM2011 - Annecy 26

27 Results from Correlations in ALICE - Jan Fiete Grosse-Oetringhaus27 Flow vs Non-Flow Correlations Flow-related effects imply correlation of two particles through a plane of symmetry ψ n –v n factorizes: Jets cause correlations of a few energetic particles by fragmentation –There can be indirect correlations: length-dependent quenching –Would be largest w.r.t. ψ 2 since it reflects the collision geometry Assess flow vs. non-flow by testing the collectivity relation –Instead of calculating V n in each p T,assoc x p T,trig bin (N(N-1)/2=55 bins), allow only one V n per p T bin (11 parameters) Jan Fiete Grosse-Oetringhaus – ALICE

28 Results from Correlations in ALICE - Jan Fiete Grosse-Oetringhaus28 Flow vs Non-Flow Correlations Compare single calculated values with global fit To some extent, a good fit suggests flow- type correlations, while a poor fit implies non- flow effects v 2 to v 5 factorize until p T ~ 3-4 GeV/c, then jet-like correlations dominate v 1 factorization problematic (influence of away-side jet) Jan Fiete Grosse-Oetringhaus – ALICE

29 La frontière any residual room for medium response? look at the small print on the away side –two-dimensional in η,φ –use information on direction of recoiling parton around re-emerging away-side jets around away-side heavy flavour Annecy spectrum promises a beautiful tool quantitative comparisons with full hydro –extract information on η/s, initial conditions (Glauber, CGC, …) speaking of which… Federico Antinori - QM2011 - Annecy 29

30 Speaking of which… how bout a fulla Fourier decomposition of de CMS pp ridge? Federico Antinori - QM2011 - Annecy 30

31 Les Quarkonia

32 Federico Antinori - QM2011 - Annecy 32 Cesar da Silva – PHENIX

33 Federico Antinori - QM2011 - Annecy 33 Hiroshi Masui – STAR

34 Federico Antinori - QM2011 - Annecy 34 Ginés Martínez – ALICE

35 Federico Antinori - QM2011 - Annecy 35 Ginés Martínez – ALICE

36 Federico Antinori - QM2011 - Annecy 36 Catherine Silvestre – CMS

37 Federico Antinori - QM2011 - Annecy 37 Hiroshi Masui – STAR

38 Federico Antinori - QM2011 - Annecy 38 Catherine Silvestre – CMS

39 Federico Antinori - QM2011 - Annecy 39 Catherine Silvestre – CMS

40 La frontière establish charmonium, bottomonium suppression(/recombination?) pattern in full glory –high statistic measurements –open flavour baseline / contamination –pA baseline the full picture should unravel before our eyes in the near future Federico Antinori - QM2011 - Annecy 40

41 La suppression à haut p T

42 Federico Antinori - QM2011 - Annecy 42 Harald Appelshäuser (ALICE), Yen-Jie Lee (CMS) & Co

43 Federico Antinori - QM2011 - Annecy 43 Peter Steinberg – ATLAS

44 Federico Antinori - QM2011 - Annecy 44 Harald Appelshäuser – ALICE

45 Federico Antinori - QM2011 - Annecy 45 further constraint to models (l 2, l 3, …) Harald Appelshäuser – ALICE

46 Federico Antinori - QM2011 - Annecy 46 Stefan Bathe - PHENIX

47 La frontière… R AA from 100s MeV to 100 GeV and beyond! dependence on orientation wrt reaction plane –l 2, l 3, l ? behaviour ! asymmetric collisions at RHIC (U-U, Cu-Au,…) tight constraints on energy loss models Federico Antinori - QM2011 - Annecy 47

48 Les particules identifiées ainsi font, les protons: … trois ptits tours, et puis sen vont! Federico Antinori - QM2011 - Annecy 48

49 Federico Antinori - QM2011 - Annecy 49 Michele Floris – ALICE are protons misbehaving?

50 p/ and K/ ratios are very similar at RHIC energies RatioData(1)(2) p/ + 0.0454+-0.00360.0720.090 p/ - 0.0458+-0.00360.0710.091+0.009-0.007 K/ + 0.156 +- 0.0120.1640.180+0.001-0.001 K/ - 0.154 +- 0.0120.1630.179+0.001-0.001 Integrated ratios vs Centrality STAR (Not feed-down corrected) ALICE, BRAHMS, PHENIX (feed-down corrected) p/ - K - / - STAR, PRC 79, 034909 (2009) PHENIX, PRC69, 03409 (2004) BRAHMS, PRC72, 014908 (2005) (1) A. Andronic et al, Nucl. Phys. A772 167 (2006)(2) J. Cleymans et al, PRC74, 034903 (2006) T = 164 MeV, B = 1 MeV T = (170±5) MeV and μ B =1+4 MeV – Predictions for the LHC Michele Floris – ALICE

51 Federico Antinori - QM2011 - Annecy 51 Michele Floris – ALICE naughty protons…

52 Federico Antinori - QM2011 - Annecy 52 protons again… Raimond Snellings – ALICE

53 La frontière understand protons hydrodynamics –fly in the ointment of otherwise triumphant hydro … how about the thermal model? –took a bit of a beating this time –need full-glory, high stats fits including Ξ -, Ω -, φ, … –can it be cured? –at what price? ( s, q, anyone?) Federico Antinori - QM2011 - Annecy 53

54 Les Jets Federico Antinori - QM2011 - Annecy 54

55 Federico Antinori - QM2011 - Annecy 55 Christof Roland – CMS

56 Federico Antinori - QM2011 - Annecy 56 Christof Roland – CMS

57 Federico Antinori - QM2011 - Annecy 57 Brian Cole – ATLAS

58 Federico Antinori - QM2011 - Annecy 58 Brian Cole – ATLAS

59 Federico Antinori - QM2011 - Annecy 59 radiative Eloss in trouble? Brian Cole – ATLAS

60 Federico Antinori - QM2011 - Annecy 60 Bolek Wyslouch – CMS

61 Federico Antinori - QM2011 - Annecy 61 Helen Caines – STAR

62 Federico Antinori - QM2011 - Annecy 62 Helen Caines – STAR

63 Federico Antinori - QM2011 - Annecy 63 Martin Purschke – PHENIX

64 Federico Antinori - QM2011 - Annecy 64 Martin Purschke – PHENIX

65 La frontìère… up to the stratosphere… – /W/Z-jet fragmentation functions! and down to the fertile soil again… –explore the surroundings of away-side jets broadening? softening? re-heating? –more organic jet algorithms? can one catch the whole jet, and then look inside as a function of distance? –in-medium fragmentation vs reaction plane path length dependence! –hadrochemistry of in-medium fragmentation –jet-hadron correlations b-tagged jets (quark vs gluon jets) extreme suppression? –true mono-jet events? what do they look like? pA reference, reconstructed jets at RHIC, … Federico Antinori - QM2011 - Annecy 65

66 Les Saveurs Lourdes Federico Antinori - QM2011 - Annecy 66

67 PHENIX v STAR electrons progress since QM2009 on NPE discrepancy new result from STAR in pp –e.g.: Wei Xie (STAR) @ Hard Probes 2010 Federico Antinori - QM2011 - Annecy 67

68 Federico Antinori - QM2011 - Annecy 68 Hiroshi Masui – STAR

69 Federico Antinori - QM2011 - Annecy 69 Stefan Bathe - PHENIX

70 Federico Antinori - QM2011 - Annecy 70 Carl Gagliardi – STAR

71 Federico Antinori - QM2011 - Annecy 71 Andrea Dainese – ALICE

72 Federico Antinori - QM2011 - Annecy 72 Andrea Dainese – ALICE

73 Federico Antinori - QM2011 - Annecy 73 How about the colour factor? quarks (C R = 4/3) expected to couple weaker than gluons (C R = 3) at p T ~ 8 GeV, factor ~ 2 less suppression expected for D than for light hadrons in BDMPS-ADSW data do show a hint of deviation (R AA D > R AA π ), but at much lower p T … … to be continued with higher statistics… N Armesto et al., Phys. Rev. D71 (2005) 054027

74 Federico Antinori - QM2011 - Annecy 74 Andrea Dainese – ALICE

75 Federico Antinori - QM2011 - Annecy 75 Catherine Silvestre – CMS

76 La frontière… high statistics D measurements are really D as suppressed as light hadrons? charm thermalisation? measure D mesons v2 subtract D background pure B electron spectrum –beauty energy loss in wide p T range in-medium fragmentation of b-tagged jets ! results from RHIC upgrades Federico Antinori - QM2011 - Annecy 76

77 Conclusions high energy AA collisions have entered an era of high precision measurements –LHC, RHIC upgrades –constrain dynamic and coupling properties of medium many ideas we were taking more or less for granted at QM 2009, are now being seriously questioned –death of Mach cone and ridge? –thermal yields, radiative Eloss are challenged the outlook is bright –high lumi (5×) Pb-Pb run this year, possibly p-Pb next year there could be some serious paradigm shifting at QM 2012! Federico Antinori - QM2011 - Annecy 77

78 Un grand merci… … aux organisateurs for the invitation to present this closing talk … à: Peter Braun-Munzinger, Brian Cole, Andrea Dainese, David dEnterria, Paolo Giubellino, Barbara Jacak, Peter Jacobs, Karel Šafařík, Carlos Salgado, Jürgen Schukraft, Edward Shuryak, Peter Steinberg, Xin-Nian Wang, Urs Wiedemann, Nu Xu and many others… … à vous tous Federico Antinori - QM2011 - Annecy 78


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