Jet - flow(v2) correlation
ShinIchi Esumi
Inst. of Physics, Univ. of Tsukuba
v2 - RAA
hydro, Nquark scaling
energy loss, re-distribution
di-hadron correlation
mach-cone like shape
reaction plane dependence
left-right asymmetry
forward-backward asymmetry
2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

1

Elliptic flow (v2)

QM06

z

STAR preliminaryxPhys. Rev. Lett. 99, 052301 (2007)

hydro-model successquark degree of freedom
high pT suppression from energy loss
re-distribution of the lost energy

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba2

Hadron large suppression
Direct γ NO suppression

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba3Jet suppression modification
with 2-particle Δφ correlation

RHIC 200GeV

RHIC 62GeVSPS 17GeVPHENIX
nucl-ex/0611019

S.Kniege, ISMD 20072009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

4

trigger pT window

h-h correlation at “p+p 200GeV” vs “Au+Au 200GeV central 0-20%”
associate pT window

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba5

RP dependent correlations

near-side

QM09, C. H. Chen

away-side

QM04: STAR

in-plain-plane

2009/Sep/15, flow workshop, ECT* Trentoneout-of-planeout-of-plane

ShinIchi Esumi, Univ. of Tsukuba

6

QM09, W. G. Holzmann

Head

Shoulderhead: yield confirms simple picture of energy loss
vs. path length; in- and out-of-plane show similaraway-side width

shoulder: geometry effects harder to disentangle
2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

7

QM09, S. Esumi
id e ir esar r dn e ig g e(trthin sidem a c h -c one
( s h o u ld
e r r e g ion)φASS -φO TRIG >0

id e io n )say egaw ad r
(h e

on
i
t
c

)

φASSO-φTRIG<0

Trigger angle selected withrespect to the 2nd moment
event plane [−π/2,π/2] to probe
the participant geometrymach-cone(shoulder region)
φASSO-φTRIG<0

thick side
If trigger angle is fixed around +/−(π/4), the associateparticles emitted left or right w.r.t. trigger direction would
feel the different thickness of the almond. It is because
the almond shaped medium is asymmetric w.r.t. jet axis.
2009/Sep/15, flow workshop, ECT* Trento−π

0
φASSO − φTRIG

ShinIchi Esumi, Univ. of Tsukubaπ8c2(data) - c2(flow)

Angle (4)/(5) (mid-central)
200GeV Au+Au -> h-h (run7)

left/right asymmetry(pTTrig=2~4GeV/c, pTAsso=1~2GeV/c)

mid-central : 20-50%(5) φs=[0,1]π/8(4) φs=[-1,0]π/8

right

(1)

left

(8)

(2)

(7)

(3)

(6)

(4)

(5)

(5)

(4)

(6)

(3)

left

(7)

(2)
(8)

(1)

in-planeright

φs = φTrig. − ΦR.P.
[−π/2,π/2]

PHENIX preliminary

in-plane
associate
regionsΔφ = φAsso. − φTrig. (rad)2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba9c2(data) - c2(flow)

Angle (3)/(6) (mid-central)
200GeV Au+Au -> h-h (run7)

left/right asymmetry(pTTrig=2~4GeV/c, pTAsso=1~2GeV/c)

mid-central : 20-50%(6) φs=[1,2]π/8(3) φs=[-2,-1]π/8

right

(1)

left

(8)

(2)

(7)

(3)

(6)

(4)

(5)

(5)

(4)

(6)

(3)

left

(7)

(2)
(8)

(1)

in-planeright

φs = φTrig. − ΦR.P.
[−π/2,π/2]

PHENIX preliminary

in-plane
associate
regionsΔφ = φAsso. − φTrig. (rad)2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

10

(4) φs=[-1,0]π/8(5) φs=[0,1]π/8200GeV Au+Au -> h-h (run7)(pTTrig=2~4GeV/c, pTAsso=1~2GeV/c)

mid-central : 20-50%c2(data) - c2(flow)

in-planetrigger selection(3) φs=[-2,-1]π/8(6) φs=[1,2]π/8(1)in-plane
associate
regions

(8)

(2)

(7)

(3)

(6)

(4)

(5)

(5)

(4)

(6)

(3)

(2) φs=[-3,-2]π/8(7) φs=[2,3]π/8(7)in-plane

(2)
(8)

(1)

φs = φTrig. − ΦR.P.
[−π/2,π/2](1) φs=[-4,-3]π/8(8) φs=[3,4]π/8
out-of-plane
trigger selection

average

PHENIX preliminary

Trigger angle selected curves are
shifted up by constant offsets,dashed average lines are overlaid.

Δφ = φAsso. − φTrig. (rad)2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

11

200GeV Au+Au -> h-h (run7)(pTTrig=2~4GeV/c, pTAsso=1~2GeV/c)
mid-central : 20-50%
(5)

(4)

(6)

(3)

(7)

(2)

(8)

(1)

peripheral : 50-93%

averageout-of-plane

in-planecentral : 0-20%

Black dashed line is same as the bottom average.
PHENIX preliminary
2009/Sep/15, flow workshop, ECT* TrentoΔφ = φAsso. − φTrig. (rad)ShinIchi Esumi, Univ. of Tsukuba12c2(data) - c2(flow)

Fitted data with
3 Gauss func.

(4) φs=[-1,0]π/8(5) φs=[0,1]π/8200GeV Au+Au -> h-h (run7)(pTTrig=2~4GeV/c, pTAsso=1~2GeV/c)

mid-central : 20-50%

in-planetrigger selection(3) φs=[-2,-1]π/8(6) φs=[1,2]π/8

FNear

FAway+ Faway−

φAsso. − φTrig. (rad)(2) φs=[-3,-2]π/8(7) φs=[2,3]π/8

Fitting with 3 Gaussian functions
Gauss function : F(height, mean, width)
FNear(A0, D0, S0) + FAway+(A+ , D+ , S+)+ FAway−(A− , D− , S−)| π − D+ | = | D− − π | ,S+= S−(1) φs=[-4,-3]π/8(8) φs=[3,4]π/8
out-of-plane
trigger selection

average

PHENIX preliminary

significant
not significant compared2009/Sep/15, flow workshop, ECT* TrentoΔφ = φAsso. − φTrig. (rad)with systematic errors
ShinIchi Esumi, Univ. of Tsukuba
13

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

14

(1)

(8)

(2)

Simulation

(7)
(6)

(3)
(4)

(5)

(5)

(4)

(6)

4 different jet shape assumptions for MC input

(3)
(7)

(2)
(8)

(1)

jet shape #1

jet shape #2

jet shape #3

jet shape #4

near- and awayside dependence

only away-side
dependence

only near-side
dependence

no R.P.
dependence

φASSO − φTRIG (rad)2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

15

nTrig / eve (soft) = 3
nAsso / eve (soft) = 8
nJet / eve (hard) = 1
nPTY / jet (hard) = 1.25
jet shape #1

v2,4Trig (soft) = 0.2, 0.029
v2,4Asso (soft) = 0.13, 0.010
v2,4Jet (hard) = 0.2, 0.0
v2,4PTY (hard) = 0.15, 0.0
jet shape #2

Comparison with data would tellus that there should be nearand away-side modification inexperimental data.
jet shape #3

Simulation

jet shape #4

There should also be a strong effect on v2 , much stronger effect on v4.
This gives natural explanation to the trigger particle bias on the associate v2.

v2 (high)=0.20 ---> 0.20
v4 (high)=0.029 ---> 0.022
v2 (low)=0.13 ---> 0.15
v4 (low)=0.010 ---> 0.016

v2 (high)=0.20 ---> 0.20
v4 (high)=0.029 ---> 0.022
v2 (low)=0.13 ---> 0.14
v4 (low)=0.010 ---> 0.014

v2 (high)=0.20 ---> 0.20
v4 (high)=0.029 ---> 0.022
v2 (low)=0.13 ---> 0.13
v4 (low)=0.010 ---> 0.012

v2 (high)=0.20 ---> 0.20
v4 (high)=0.029 ---> 0.022
v2 (low)=0.13 ---> 0.12
v4 (low)=0.010 ---> 0.009

φASSO − φTRIG (rad)2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

16

QM09, B. Betz

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

17Bin 5

1
Mach cone

ak
pe
ar
Ne

J.Jia, R.Wei, S.Esumi, arXiv:0903.3263
If the multiplicities
reduces with the path
length because ofabsorption...

Bin 0

Note: original jets are
generated according
to Ncoll profile
Mach cone 2
kT smearing included,
modified mach-cone byabsorption according to
Eloss. The asymmetry is
now flipped.
punch through jets included,
smeared with R.P. resolution

cone1

cone2
φASSO − φTRIG (rad)2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

18

AMPT (v1.11, parton cascade with string melting v2.11) Au+Au at sqrt(sNN)=200GeV
(1)

(8)

(true) reaction plane aligned correlation function

(2)

(7)

Similar trend as
seen in experiment

(6)

(3)
(4)

(5)

(5)

(4)

(6)

(3)
(7)

(2)
(8)

(1)

trend is reversed

4~18%
b = 3.5~7 (fm)perfect R.P. resolution
no v2 subtraction needed
2009/Sep/15, flow workshop, ECT* Trento

44~%b = 10.5~ (fm)φAsso. − φTrig. (rad) with trigger angle selected w.r.t. R.P.
(pTAsso. : 0.5~1.5GeV/cpTTrig. : 1.5~5.0GeV/c)

ShinIchi Esumi, Univ. of Tsukuba

19

Both near/away shapes show a strong v2(in-plane preference) as well as a strong
left/right asymmetry (in-plane preference)
QM09 STAR

Ridge/Mach-cone like correlated pairs have been
known to show similar properties as bulk in termsof inverse slope (apparent temperature) andparticle ratios (Baryon/Meson)

200GeV Au+Au 20-60% (pTTrig=3~4GeV/c, pTAsso=1~1.5GeV/c, |Δη|>0.7, φTrig-ΦR.P.<0)

QM08 STAR3<pTtrig<4, 1.5<pTtrig<2.0 GeV/c

Jet does not depends on it
Jet reduces v2

Jet

Ridge+Mach cone shape depends on R.P. angle.
Ridge+Mach cone (away side ridge) is a source of of v2

Ridge

STAR Preliminary

parallel aligning of several di-jets with
R.P. because of almond geometry + Eloss.
2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

20

3-particle correlation “Δφ12 vs Δφ13”

jet

Δφ*=0

d+Au
Collisions

p

Δθ*=π

Deflected Jets

p

Au

Au

Cone like Jets

PHENIX Preliminary(Δφ1-Δφ2)/2

PHENIX Preliminary

Au+Au
Central 0-12%

Both measurements prefer
Mach-cone scenario.

Cone angle (radians)
No pT dependence, too.

STAR Preliminary
STAR Preliminary

2009/Sep/15, flow workshop, ECT* Trento(Δφ1-Δφ2)/2

pT (GeV/c)

ShinIchi Esumi, Univ. of Tsukuba

21

forward-backward asymmetry0η

left-right asymmetryyxz

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

22γ,Jet,π0 - hadroncorrelation

RHIC-AGS’09, Y. S. Lai

Comparisons are
the most important!

to y
r
e
s nergolec
nd rtonar
ser ial paolge
C init
g
i
tr
a
the
mm
a
er
G
g
g
i
) tr
R
rge
a
l
(
Jet
er
g
g
tri
)
ll R
a
(sm
t
e
J
er
g
ig
) tr
n
dro
a
ias
b
0 (h
π
ace
f
r
su s
e
r
o
los
m
y
d
g
an enerer
mo en bygiv

2009/Sep/15, flow workshop, ECT* Trento

STAR Preliminary

Au+Au 0~10%

QM09, M. Ploskon

ShinIchi Esumi, Univ. of Tsukuba

23

J-cal for LHC-ALICE experimentfor back-to-back jets measurements

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

24Summary1) Gamma / Jet / hadron triggered correlation analysis
as a function of centrality and R.P.dependences
gives us the QGP tomography.
2) Mach-cone and Ridge like shape w.r.t.
a) geometrical suppression from energy loss,b) re-distribution of the lost energy,c) connection with flow/expansion dynamicsd) transverse, longitudinal and radial(surface) direction
3) Low pT v2 can be biased by the triggered jet.
associated particle v2hard > inclusive v2all >~ thermal v2soft
4) Global understanding of RAA, v2 from low pT (flow)
to high pT (suppression), especially soft-hard interplay
at middle pT region (jet without any flow subtraction?).
2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

25

200GeV Au+Au -> h-h (run7)(pTTrig=2~4GeV/c, pTAsso=1~2GeV/c)
mid-central : 20-50%
(5)

(4)

(6)

(3)

(7)

(2)

(8)

(1)

peripheral : 50-93%

averageout-of-plane

in-planecentral : 0-20%

PHENIX preliminary
2009/Sep/15, flow workshop, ECT* Trento

φAsso. − φTrig. (rad)ShinIchi Esumi, Univ. of Tsukuba

26

Results on fitting parameters
FNear

FAway+ Faway−

φAsso. − φTrig. (rad)A0Gauss function : F(height, mean, width)
FNear(A0, D0, S0) + FAway+(A+ , D+ , S+) + FAway−(A− , D− , S−)| π − D+ | = | D− − π | ,S+= S−
near side peak position
left/right asymmetry

S0

(1)

(8)

(2)

(7)

(3)

(6)

(4)

(5)

(5)

(4)

(6)

(3)

(7)

(2)
(8)

0 ~ 20 %20 ~ 50 %
50 ~ 93 %D00.5(A+ + A−)

away side shoulder heightleft/right asymmetry

away side shoulder
peak position(A − A )0.5 (A+ + A− )+PHENIX preliminary
2009/Sep/15, flow workshop, ECT* Trentoin-plane(1)

φTrig.−ΦR.P.
[−π/2,π/2]

S+/−| D+/− − π |−φTrig. − ΦR.P. (rad)ShinIchi Esumi, Univ. of Tsukuba

27

nTrig / eve (soft) = 3
nAsso / eve (soft) = 8
nJet / eve (hard) = 1
nPTY / jet (hard) = 1.25

Simulation

v2,4Trig (soft) = 0.2, 0.029
v2,4Asso (soft) = 0.13, 0.010
v2,4Jet (hard) = 0.0, 0.0
v2,4PTY (hard) = 0.0, 0.0

jet shape #1

jet shape #2

jet shape #3

jet shape #4

v2 (high)=0.20 ---> 0.15
v4 (high)=0.029 ---> 0.022
v2 (low)=0.13 ---> 0.14
v4 (low)=0.010 ---> 0.015

v2 (high)=0.20 ---> 0.15
v4 (high)=0.029 ---> 0.022
v2 (low)=0.13 ---> 0.13
v4 (low)=0.010 ---> 0.014

v2 (high)=0.20 ---> 0.15
v4 (high)=0.029 ---> 0.022
v2 (low)=0.13 ---> 0.12
v4 (low)=0.010 ---> 0.011

v2 (high)=0.20 ---> 0.15
v4 (high)=0.029 ---> 0.022
v2 (low)=0.13 ---> 0.11
v4 (low)=0.010 ---> 0.009

φASSO − φTRIG (rad)2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

28

AMPT (v1.11, parton cascade with string melting v2.11) Au+Au at sqrt(sNN)=200GeVφTrig. − ΦR.P. > 0 (open symbols)
φTrig. − ΦR.P. < 0 (filled symbols)

0~4%
b = 0~3.5 (fm)

4~18%
b = 3.5~7 (fm)perfect R.P. resolution
no v2 subtraction needed
2009/Sep/15, flow workshop, ECT* Trentoin-plane

peripheral

average out-of-plane(true) reaction plane aligned correlation function

central

AMPT

18~44%
b = 7~10.5 (fm)44~%
b = 10.5~ (fm)φAsso. − φTrig. (rad) with trigger angle selected w.r.t. R.P.
(pTAsso. : 0.5~1.5GeV/cpTTrig. : 1.5~5.0GeV/c)

ShinIchi Esumi, Univ. of Tsukuba

29

AMPT(v1.25/v2.25 string melting) : Au+Au 200GeV b=7fm (with embedding option)
no embedding

7GeV
in-plane

7GeV
out-of-plane

7GeV
at +45 deg

Z.W.Lin, J.Jia,
S. Mohapatra,
S. Esumi

7GeV
at −45 deg

mixed events with the same triggered (embedded) events
2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

30

mixed events with the same triggered (embedded) eventsno embedding

7GeV
in-plane

7GeV
out-of-plane

7GeV
at +45 deg

7GeV
at −45 deg

mixed events without the triggered (embedded) events--- mixed events from min.bias events ---2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

31

Direct γ - hadron coincidence

QM09, M. Connors

Head region
2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

32

Jet - hadron correlation

RHIC-AGS’09, J. PutschkeHigh Tower Trigger (HT) : (ηxφ)=(0.05x0.05) ET>5.4GeV

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

33

Pythia (p+p) jet

Pyquen jet(quenched)

1/NTRIG dNASSO/dφ

ETTRIG > 80GeVETASSO = 20~40GeVETTRIG > 80GeVETASSO = 40~80GeV

Di-jet simulation
at 5.5TeV
betweenpythia (p+p)
andpyquen(quench model)

out-ward trigger
in-ward trigger

out-ward

in-wardETTRIG > 80GeVETASSO > 80GeV

D. Sakata,Grad. Student of Tsukuba
Δφ = φJetAsso - φJetTrig (rad)2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

34

γ in
PHOS/J-cal

π0 in
PHOS/J-cal

Recoil Di-jet ETjet1>70GeV

EM-cal

EM-calRecoil π0-jet ETπ0>30GeV

Recoil γ-jet ETγ>30GeV

jet (R<0.3)
in J-cal

EM-cal2009/Sep/15, flow workshop, ECT* Trento

M. Sano,H. Yokoyama,
Grad. Student of Tsukuba
ShinIchi Esumi, Univ. of Tsukuba

35

Improvement in jet energy resolution

2009/Sep/15, flow workshop, ECT* Trento

ShinIchi Esumi, Univ. of Tsukuba

36