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LHC−ALICE実験におけるソフトな指針で見るQGP QGP through soft probes at LHC-ALICE

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Presentation on theme: "LHC−ALICE実験におけるソフトな指針で見るQGP QGP through soft probes at LHC-ALICE"— Presentation transcript:

1 LHC−ALICE実験におけるソフトな指針で見るQGP QGP through soft probes at LHC-ALICE
江角晋一、　筑波大学、物理 ShinIchi Esumi, 　Univ. of Tsukuba Contents ALICE experiment at LHC Multiplicity and pT distribution HBT, v2 and higher harmonics vn Multi-particle correlations Summary JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

2 Univ. of Tsukuba, ShinIchi Esumi
Event display during my shift last November/2010 my shift leader my PC DAQ terminal It was a nice winter day at CERN. JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

3 Univ. of Tsukuba, ShinIchi Esumi
TPC ZDC PID A.Toia, QM11 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

4 Univ. of Tsukuba, ShinIchi Esumi
Multiplicity in A+A at the highest possible energy PRL105, (2010) factor of ~2 increase with similar Npart dependence JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

5 Univ. of Tsukuba, ShinIchi Esumi
dNch/dh distribution and ET/Nch A.Toia, QM11 longitudinal scaling holds increases with sqrt(sNN) JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

6 Univ. of Tsukuba, ShinIchi Esumi
Particle identified pT distribution M.Floris, QM11 larger pT shift for heavier particles larger radial flow than in this hydro model JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

7 Univ. of Tsukuba, ShinIchi Esumi
Particle mass and Npart dependence of <pT> p+p M.Floris, QM11 M.Floris, QM11 increased radial flow than at RHIC and as a function of centrality JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

8 Univ. of Tsukuba, ShinIchi Esumi
Blast wave fitting (hydro-dynamical model based fitting function) Tch QGP hadron gas p / p ratio B M.Floris, QM11 larger expansion at LHC with similar freeze-out Tfo M.Floris, QM11 Baryon density ~ 0 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

9 Univ. of Tsukuba, ShinIchi Esumi
HBT interferometry beam Rlong (RL) Rside (RTS) Rout (RTO) beam duration time expanding source static source JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

10 Univ. of Tsukuba, ShinIchi Esumi
Similar kT dependence from extended and expanding source JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

11 Univ. of Tsukuba, ShinIchi Esumi
Beam energy dependence of 3D source size factor of ~2 increase in source volume JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

12 Univ. of Tsukuba, ShinIchi Esumi
Elliptic flow (elliptic event anisotropy) : v2 lower pT x z Reaction plane Hydro-dynamical expansion higher pT larger energy loss by long path length 2nd harmonic amplitude of azimuthal distribution with respect to the reaction plane 2: v2 reaction plane smaller energy loss by short path length itrack - nevent JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

13 Univ. of Tsukuba, ShinIchi Esumi
v2 vs pT comparison between RHIC and LHC similar hydro-dynamic properties JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

14 Univ. of Tsukuba, ShinIchi Esumi
Beam energy dependence of <v2> and v2(pT) <v2> still increases with <pT> v2(pT) saturates JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

15 Univ. of Tsukuba, ShinIchi Esumi
v2 and RAA at higher pT region systematic uncertainty R. Snellings, QM11 H. Appleshauser, QM11 v2 from suppression dominance given by path length JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

16 Univ. of Tsukuba, ShinIchi Esumi
Particle identified v2 and RAA at higher pT A. Dobrin, QM11 S. Schuchmann, QM11 particle dependence seems to be vanished at higher pT JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

17 Univ. of Tsukuba, ShinIchi Esumi
Particle identified v2 at lower pT hydro (arXiv: ) hydro (arXiv: ) M. Krzewicki, QM11 larger mass-splitting + familiar Baryon/Meson difference larger radial flow in central collisions than in this hydro model JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

18 Univ. of Tsukuba, ShinIchi Esumi
Small deviations in (mT-m0)/nq scaled v2 Pb+Pb 2.76TeV Au+Au 200GeV Au+Au 39GeV proton proton PHENIX Preliminary PHENIX Preliminary M. Krzewicki, QM11 roughly (mT-m0)/nq scaled for all energies larger pT shift for heavier particles radial flow increases with energy JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

19 Univ. of Tsukuba, ShinIchi Esumi
y v3 and Initial Fluctuation x Reaction Plane (x-z) x arXiv: z y y black-disk > sign-flipping v3 initial fluctuation --> no-sign-flipping v3 similar effects for all the higher moments vn x JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi 19

20 Univ. of Tsukuba, ShinIchi Esumi
Centrality and pT dependence of vn arXiv: almost zero signal for sign-flipping v3 (some small signal at RHIC-PHENIX) significant non-sign-flipping v3, v4 at central and higher pT smaller centrality dependence for v3, v4 than for v2 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

21 Univ. of Tsukuba, ShinIchi Esumi
Particle identified v3 nq scaling hydro M. Krzewicki, QM11 hydro : similar mass-splitting at lower pT nq scaling : similar Baryon / Meson difference at higher pT The KET/nq scaling for v3 is also not as good as for v2 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

22 2-particle azimuthal correlation function
--- flow un-subtracted C2 --- A. Adare, QM11 arXiv: rapidity separated C2 is well described by v2,3,4,5 as naturally expected because of vn{2, ||>1} JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

23 (vntrig. x vnasso.) global fit
with various pT (trig. x asso.) combinations describes the C2 shape well at lower pT assumption : 2-part. correlation is only given by vn(pT) (high pT x low pT) pair C2 is well described ! A. Adare, QM11 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

24 Univ. of Tsukuba, ShinIchi Esumi
vn{C2 global fit} ~ vn{2, ||>1} A. Adare, QM11 good agreement of vn even towards higher pT coming from (low x high) pT combinations in C2 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

25 Univ. of Tsukuba, ShinIchi Esumi
init. fluc. : Glauber / CGC hydro./s : Large / Small arXiv: arXiv: JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

26 Univ. of Tsukuba, ShinIchi Esumi
Summary 2.76TeV Pb+Pb collisions are measured in LHC-ALICE - factor of 2 in charged particle multiplicity dNch/d - factor of 2 in freeze-out volume from HBT - net-Baryron free region in the phase diagram - increased and pronounced radial flow in several cases - similar hydro properties compared with RHIC - initial fluctuation and hydro-expansion drive the vn - discrimination power on initial geometry and viscosity JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

27 Univ. of Tsukuba, ShinIchi Esumi
Back-up JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

28 Univ. of Tsukuba, ShinIchi Esumi
PRC arXiv: K 2 3 2 G G 3,5 K 4 5 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

29 Univ. of Tsukuba, ShinIchi Esumi
arXiv: JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

30 Univ. of Tsukuba, ShinIchi Esumi
|| dependence of vn from LHC-ATLAS arXiv: JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

31 || dependence of (vntrig. x vnasso.)
with vn{C2 global fit}, which they call vn factorization in ATLAS arXiv: JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

32 Univ. of Tsukuba, ShinIchi Esumi
Probe the transverse geometry and/or dynamics with trigger angle selected 2-particle correlation near side (trigger direction) thin side mach-cone (shoulder region) ASSO-TRIG>0 ASSO-TRIG<0 away side (head region) thick side mach-cone (shoulder region) ASSO-TRIG<0 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

33 Univ. of Tsukuba, ShinIchi Esumi
jet, di-jet and multi-particle correlation with various conditions Jet , Trig. Jet , Trig. Jet , Trig. 1 3 5 7 8 8 2 4 6 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

34 Univ. of Tsukuba, ShinIchi Esumi
Observed left/right asymmetry remains after “the usual/normal” v3 subtraction. 200GeV Au+Au -> h-h (pTTrig=2~4, pTAsso=1~2GeV/c) v2(v4{2})-only subtraction PHENIX preliminary out-of-plane trigger case in-plane trigger case Trigger angle selection w.r.t. 2 separately for left(up) / right(down) Trig. Trig. Trigger angle selected 2-part. corr. data are plotted in polar coordinate by rotating 2 R.P. angle as X-axis. 2 R.P. 2 R.P. Trig. Flow subtracted yield is shown radially with base line. Trig. surface dominance penetration dominance Two competing processes seen JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

35 Univ. of Tsukuba, ShinIchi Esumi
Possible charge asymmetry signal from Local Parity Violation S. A. Voloshin, Phys. Rev. C 70, (2004). STAR Collaboration: Phys. Rev. Lett. 81, (2009) STAR Collaboration: Phys. Rev. C81, (2010) P. Christakoglou, QM11 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

36 Univ. of Tsukuba, ShinIchi Esumi
pT dependence of the observed asymmetry signal P. Christakoglou, QM11 JPS symposium, QGP at RHIC-LHC, 17/Sep/2011, Hirosaki Univ. of Tsukuba, ShinIchi Esumi

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