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Experimental study of collective motion
in the quark gluon plasma
ShinIchi Esumi
Univ. of Tsukuba, Inst. of Physics
1.
2.
3.
Thermal, chemical freeze-out
Radial, elliptic expansion
Jet suppression, modification
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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QGP
Hadron
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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BNL
CERN
t
z
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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chemical freeze-out
the end of inelastic interactions,
when the particle species and ratios
are frozen
Phys. Rev. C 73(2006) 034905
‘net’ proton dN/dy
extrapolated
to LHC
charged particle dN/dy
AGS
SPS
RHIC 62
BRAHMS preliminary
RHIC 200
PHOBOS
LHC 5500
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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thermal freeze-out
the end of elastic interactions,
when the momentum spectra
are frozen
collective expansion
radial flow
RHIC Au+Au
Central
locally thermal
SPS Pb+Pb
Central
RHIC Au+Au
Peripheral
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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SQM06, Yifei Zhang
nucl-ex/0307024
AuAu Central
charm hadron
AuAu Central
strangeness hadron
SQM06, Yifei Zhang
AuAu Central
, K, p
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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anisotropic flow
x
y
z
sideward flow (v1)
y
elliptic azimuthal event anisotropy
low pT
high pT
x
dN/df
elliptic flow (v2)
initial geometry
final momentum anisotropy
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
-
0

fparticle-FR.P. (rad)
ShinIchi Esumi, Univ. of Tsukuba, Japan
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Phys. Rev. Lett. 99, 052301 (2007)
particle identified v2
at RHIC
Number of constituent quark scaling
in hadron v2 as well as multi-strange
baryon v2: v2 is already established
during the quark phase before the
hadronization. This seems to be true
even for heavy quark like charm.
Hadron
QM08: A.Dion
QM06
STAR preliminary
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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source geometry
common initial
source geometry from
centrality measurement
AGS
final source geometry
from HBT measurement
RHIC
final particle emission
anisotropy from
v2 measurement
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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Jet suppression modification
with 2-particle Df correlation
jet
p
RHIC 200GeV
Au
p
RHIC 62GeV
Au
SPS 17GeV
PHENIX
nucl-ex/0611019
S.Kniege, ISMD 2007
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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3-particle correlation “Df12 vs Df13”
jet
d+Au
Collisions
p
p
Au
Au
(Df1-Df2)/2
STAR Preliminary
Au+Au
Central 0-12%
Cone angle (radians)
STAR Preliminary
(Df1-Df2)/2
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
pT (GeV/c)
ShinIchi Esumi, Univ. of Tsukuba, Japan
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Jet modification
and geometry
QM04: STAR
QM08: STAR, PHENIX
STAR
3<pTtrig<4GeV/c & 1.0<pTasso<1.5GeV/c 20-60%
Df = fassociate - ftrigger (rad)
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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Phys.Rev. C 77, 011901 (2008)
QM08: Aoqi Feng
STAR
double peak
region
 region
away
near
Shoulder / Head / S.
Df(rad)
QM08: Aoqi Feng
Ridge
3<pTtrig<4, 1.5<pTtrig<2.0 GeV/c
STAR Preliminary
Jet
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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p+p and
peripheral
Au+Au
central
Au+Au
TInclusive ~ TShoulder ~ TRidge < TJet
(<)
(<)
STAR Preliminary
QM06
inclusive
ridge
jet
QM08
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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M. Daugherity, QM08
data - fit (except same-side peak)
83-94%
55-65%
Shape changes little from
peripheral to the transition
46-55%
Large change
within ~10%
centrality
0-5%
Smaller change from
transition to most central
Peak Amplitude
Peak η Width
Peak φ Width
STAR Preliminary
200 GeV
62 GeV
STAR Preliminary
STAR Preliminary
binary scaling assumption
in Kharzeev and Nardi model
HIJING 1.382 default
200 GeV, quench off
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
Centrality
ShinIchi Esumi, Univ. of Tsukuba, Japan
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Summary
(1) Thermal, chemical freeze-out
Tch ~ QGP phase boundary
History of thermal freeze-out
(2) Radial, elliptic expansion
Quark phase
Quark coalescence
History of radial, elliptic expansion
(3) Jet suppression, modification
QGP matter property
relation between v2 and modification
subtraction of flow, which includes the modification
jet-jet correlation via reaction plane (part of v2)
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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M. Issah, QM08
V4
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
V4/(nq)2
ShinIchi Esumi, Univ. of Tsukuba, Japan
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K. Miki, QM08
PHENIX preliminary
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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M. P. McCumber, QM08
Jet + Flow (Raw)
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
Jet (Flow subtracted)
ShinIchi Esumi, Univ. of Tsukuba, Japan
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QM08: Bedanga Mohanty
QM08: Aoqi Feng
STAR Preliminary
Au+Au 200 GeV
Ridge vs. Inclusive
QM08: Paul Sorenson
20-60%
STAR Preliminary
3< pTtrig < 4 GeV/c
pTasso : 1.0- 1.5 GeV/c
Jet Cone vs. Inclusive
20-60%
sys. error v2{RP}
sys. error v2{4}
STAR Preliminary
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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J of Phys: Conf
27 (2005) 98
M. Daugherity, QM08
Proton+Proton Components
transverse correlations
axial correlations
pT (Gev/c)
yt2
4
3
2
1
0.5
φΔ
ηΔ
soft component
yt ~ ln(pt)
yt1
hard component
These structures
define minijet
correlations
φΔ
φΔ
ηΔ
Longitudinal Fragmentation (“strings”) 1D Gaussian, US pairs
HBT peak at origin, LS pairs
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ηΔ
Minijets 2D Gaussian at origin,
away-side peak actually cos(φΔ)
ShinIchi Esumi, Univ. of Tsukuba, Japan
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M. Daugherity, QM08
Δφ
longitudinal fragmentation
1D gaussian
HBT, res., e+e2D exponential
Δη
Minijet Peak
2D gaussian
Away-side
-cos(φ)
1.2M minbias 200 GeV Au+Au events
Included all tracks with pT > 0.15 GeV/c, |η| < 1, full φ
Elliptic flow
cos(2φΔ)
STAR Preliminary
84-93%
75-84%
65-75%
55-65%
46-55%
28-38%
19-28%
9-19%
5-9%
0-5%
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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84-93%
75-84%
65-75%
55-65%
46-55%
Fit model
28-38%
19-28%
9-19%
5-9%
0-5%
84-93%
75-84%
65-75%
55-65%
46-55%
28-38%
19-28%
Fit residual = data - model
9-19%
APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
5-9%
0-5%
ShinIchi Esumi, Univ. of Tsukuba, Japan
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APS, HEDP/HEDLA meeting, 15/Apr/2008, St. Louis, MO, USA
ShinIchi Esumi, Univ. of Tsukuba, Japan
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