two and three particle flavor dependent correlations
DESCRIPTION
Two and Three particle Flavor Dependent Correlations. N. N. Ajitanand Nuclear Chemistry, SUNY, Stony Brook For the PHENIX Collaboration. PRL87, 052301 (2001). Extrapolation From E T Distributions. peripheral collisions. Central collisions. - PowerPoint PPT PresentationTRANSCRIPT
N. N. AjitanandNuclear Chemistry, SUNY, Stony Brook
For
the PHENIX Collaboration
Two and Three particle Flavor Dependent Correlations
Two and Three particle Flavor Dependent Correlations
N. N. Ajitanand, ISMD05 2
PRL87, 052301 (2001)
Central collisionsperipheral collisions
High Energy density matterHigh Energy density mattercreated at RHIC!created at RHIC!
High Energy density matterHigh Energy density mattercreated at RHIC!created at RHIC!
time to thermalize the system (0 ~ 0.2 - 1 fm/c)Bjorken~ 5 - 15
GeV/fm3
~ 35 – 100 ε0
dy
dE
RT
Bj0
2
11
Extrapolation From EExtrapolation From ETT
DistributionsDistributions
Phase Transition:3/1,170 fmGeVMeVT
Energy Density is Well Above theEnergy Density is Well Above the Predicted Value for the Phase TransitionPredicted Value for the Phase Transition
Energy Density is Well Above theEnergy Density is Well Above the Predicted Value for the Phase TransitionPredicted Value for the Phase Transition
Pressure build up Flow Pressure build up Flow
Hard Scattering Jets Hard Scattering Jets
N. N. Ajitanand, ISMD05 3
Jets are an ideal diagnostic probe for the medium:Jets are an ideal diagnostic probe for the medium:Jets are an ideal diagnostic probe for the medium:Jets are an ideal diagnostic probe for the medium:
coneRFragmentation:
z hadron
parton
p
p
Jets are Remarkable Probes for this High-density Matter
• Auto-Generated on the right time-scale• Calibrated • Calculable (pQCD)• Accessible statistically via correlations in Au+Au
Jets are Remarkable Probes for this High-density Matter
• Auto-Generated on the right time-scale• Calibrated • Calculable (pQCD)• Accessible statistically via correlations in Au+Au
N. N. Ajitanand, ISMD05 4
mesonsmesonsbaryonsbaryonsAssociated particle
• MesonMeson• BaryonBaryon 1.0 2.5 GeV/cpT 1.0 2.5 GeV/cpT
pT
2 ( )P assor Leading Hadron
2.5 4.0 GeV/cpT 2.5 4.0 GeV/cpT
Re al
mix
NC
N
Correlation FunctionCorrelation Function
Baryon & MesonMeson identification done identification done using EMC TOFusing EMC TOF
200 GeV Au Au200 GeV Au Au
The route to jets: Two Particle Azimuthal CorrelationsThe route to jets: Two Particle Azimuthal CorrelationsThe route to jets: Two Particle Azimuthal CorrelationsThe route to jets: Two Particle Azimuthal Correlations
N. N. Ajitanand, ISMD05 5
Flow anisotropy
Jet asymmetry
Flavor Dependent CorrelationsFlavor Dependent CorrelationsFlavor Dependent CorrelationsFlavor Dependent Correlations
Strongly Flavor dependent Asymmetries and Anisotropies Strongly Flavor dependent Asymmetries and Anisotropies Observed in Two-Particle CorrelationsObserved in Two-Particle Correlations
Strongly Flavor dependent Asymmetries and Anisotropies Strongly Flavor dependent Asymmetries and Anisotropies Observed in Two-Particle CorrelationsObserved in Two-Particle Correlations
Meson-Meson (High Asymmetry)
Baryon-Baryon (Low Asymmetry)
N. N. Ajitanand, ISMD05 6
Out-of-plane
22
22
2 sin cos 2 sin cos 42
2 2 sin
2 4
2 cos 2
R Ro
cut
R
c c
c c
vv
vv
v2 extinction for constrained correlationsv2 extinction for constrained correlations
Constrain Leading Particle out of Reaction Plane within a constraint byte
c
In-plane
c
is given by :2outv
N. N. Ajitanand, ISMD05 7
i.e. Zero Yield At Minimum (ZYAM)
0
HarmoC Jet Functiorrelation Function onic n
C a H J
0
0
Jet Function
JC a H
a
min 0J
a0 is obtained without putting any constraint on the Jet shape by requiring
Two source model : Flow (H) & Jet (J)
Phys. Rev. C 72, 011902 (2005)Phys. Rev. C 72, 011902 (2005)
2
vary
~ 0
out
c
Operational Demonstration
untill v
Unconstrained harmonic
Constrained
Subtraction Extinction
High pt particle constrainedperpendicular to RP
Constraint byte
Decomposing the Flow and Jet signalsDecomposing the Flow and Jet signalsDecomposing the Flow and Jet signalsDecomposing the Flow and Jet signals
Reliable decomposition of Flow and Jet Contributions achievedReliable decomposition of Flow and Jet Contributions achievedvia two separate methods via two separate methods
Reliable decomposition of Flow and Jet Contributions achievedReliable decomposition of Flow and Jet Contributions achievedvia two separate methods via two separate methods
R
1 (A) LP
2 (B)
12
c
N. N. Ajitanand, ISMD05 8
Input jet extremely well recovered!
Simulation Test of AnsatzSimulation Test of Ansatz Simulation Test of AnsatzSimulation Test of Ansatz Blue line: input jet-function obtained fromTagging jet-particles in simulation
Blue squares: Extracted jet-function
N. N. Ajitanand, ISMD05 9
Input jet faithfully recovered even with unusual jet-shapes!
Rob
ust J
et-e
xtra
ctio
n ac
hiev
ed!
Rob
ust J
et-e
xtra
ctio
n ac
hiev
ed!
Simulation Test of Ansatz: Unusual Jet shapesSimulation Test of Ansatz: Unusual Jet shapes Simulation Test of Ansatz: Unusual Jet shapesSimulation Test of Ansatz: Unusual Jet shapes
N. N. Ajitanand, ISMD05 10
Subtracted jet-pair Subtracted jet-pair distributionsdistributions
Subtracted jet-pair Subtracted jet-pair distributionsdistributions
Significant Broadening and Strong Modification of away-side Jet observed!
(Folded into 0-)
hep-ph/0411341Armesto,Salgado,Wiedemann
Correlations of Jets with flowing medium
local min
Wake effect or “sonic boom”
hep-ph/0411315Casalderrey-Solana,Shuryak,Teaneynucl-th/0406018 Stoecker
N. N. Ajitanand, ISMD05 11
Meson-Meson
Baryon-Meson
Decomposing the Flow and Jet signalsDecomposing the Flow and Jet signalsDecomposing the Flow and Jet signalsDecomposing the Flow and Jet signals
ZYAM subtracted J(ZYAM subtracted J())
Flow extinguished C(Flow extinguished C() = J() = J())
Both methods agree!Both methods agree!Both methods agree!Both methods agree!
Meson-triggered and Meson-triggered and Baryon-triggeredBaryon-triggered
J(J() are different on near- ) are different on near- and away-side!and away-side!
Meson-triggered and Meson-triggered and Baryon-triggeredBaryon-triggered
J(J() are different on near- ) are different on near- and away-side!and away-side!
N. N. Ajitanand, ISMD05 12
MesonMeson vs. vs.BaryonBaryon trigger trigger
Flavor dependent away-side modification in yield and shape Flavor dependent away-side modification in yield and shape Flavor dependent away-side modification in yield and shape Flavor dependent away-side modification in yield and shape
Flavor dependent near-side modificationFlavor dependent near-side modificationFlavor dependent near-side modificationFlavor dependent near-side modification
N. N. Ajitanand, ISMD05 13
For meson trigger with associated meson For meson trigger with associated meson and baryon partners, similar modification and baryon partners, similar modification
observedobserved
. . /
. . near side away side
assoc baryon assoc baryon
assoc meson assoc meson
N. N. Ajitanand, ISMD05 14
Proton vs anti-proton correlationsProton vs anti-proton correlationsProton vs anti-proton correlationsProton vs anti-proton correlations
Near-side yield non-zero only Near-side yield non-zero only for baryon-anti-baryon pairsfor baryon-anti-baryon pairs
Near-side yield non-zero only Near-side yield non-zero only for baryon-anti-baryon pairsfor baryon-anti-baryon pairs
Baryon number conservation in jet ?Baryon number conservation in jet ?Baryon number conservation in jet ?Baryon number conservation in jet ?
Poster (A. Sickles)
N. N. Ajitanand, ISMD05 15
Possible modification of Jet-TopologyPossible modification of Jet-TopologyPossible modification of Jet-TopologyPossible modification of Jet-Topology
Wake Effect or “sonic boom” Wake Effect or “sonic boom”
hep-ph/0411315 Casalderrey-Solana,Shuryak,Teaneynucl-th/0406018 StoeckerHep-ph/0503158 Muller,Ruppert
hep-ph/0411341 Armesto,Salgado,Wiedemann
Correlation of Jet with flowing medium Correlation of Jet with flowing medium
Cherenkov gluon radiation Cherenkov gluon radiation
nucl-th/0507063 Koch, Majumder, X.-N. Wang
N. N. Ajitanand, ISMD05 16
For flow extinction:
LP constrained relative to the reaction plane with Constraint byte C
adjusted to extinction value.
Poster (N. Ajitanand)
Novel Method to unravel Jet-Topologies: Three-Particle CorrelationsNovel Method to unravel Jet-Topologies: Three-Particle CorrelationsNovel Method to unravel Jet-Topologies: Three-Particle CorrelationsNovel Method to unravel Jet-Topologies: Three-Particle Correlations
2
3
2.5 4.0 (Gev/c)
1.0 2.5
1.0 2.5
LPT
assocT
assocT
p
p
p
2
3
2.5 4.0 (Gev/c)
1.0 2.5
1.0 2.5
LPT
assocT
assocT
p
p
p
Added topological information as compared to two particle correlationsAdded topological information as compared to two particle correlationsAdded topological information as compared to two particle correlationsAdded topological information as compared to two particle correlations
Mach coneMach cone
“Normal” Jet“Normal” Jet“Bent” Jet“Bent” Jet
Calibrating Three-Particle Correlations: Simulation TestCalibrating Three-Particle Correlations: Simulation TestCalibrating Three-Particle Correlations: Simulation TestCalibrating Three-Particle Correlations: Simulation Test
Powerful Tool to distinguish between different scenarios!Powerful Tool to distinguish between different scenarios!Powerful Tool to distinguish between different scenarios!Powerful Tool to distinguish between different scenarios!
Note characteristic ridges:Note characteristic ridges:Mach cone or Cherenkov coneMach cone or Cherenkov cone
Note characteristic ridges:Note characteristic ridges:Mach cone or Cherenkov coneMach cone or Cherenkov cone
N. N. Ajitanand, ISMD05 18
PHENIX Preliminary
10%<cent<20%
Data: Three-Particle CorrelationsData: Three-Particle CorrelationsData: Three-Particle CorrelationsData: Three-Particle Correlations
Flow+Jet
PHENIX PreliminaryAfter Harmonic After Harmonic
Extinction:Extinction:
After Harmonic After Harmonic Extinction:Extinction:
Flow+JetJet onlyMach cone
Mach cone
Sim
ulat
ion
Sim
ulat
ion
Data indicates apparent cone structure for away-side jet!Data indicates apparent cone structure for away-side jet!Data indicates apparent cone structure for away-side jet!Data indicates apparent cone structure for away-side jet!
N. N. Ajitanand, ISMD05 19
PHENIX Preliminary
20<cent<40 40<cent<60
PHENIX Preliminary
HHH Jet Only
N. N. Ajitanand, ISMD05 20
0.7<pt_assoc<1.00.5<pt_assoc<0.7
HHH 10<cent<20%
1.0<pt_assoc<2.5
PHENIX PreliminaryPHENIX Preliminary
PHENIX Preliminary
PHENIX PreliminaryPHENIX Preliminary
Hadron-Meson-Meson Hadron-Meson-Meson Hadron-Meson-Meson Hadron-Meson-Meson Hadron-Baryon-Baryon Hadron-Baryon-Baryon Hadron-Baryon-Baryon Hadron-Baryon-Baryon
Strong flavor Dependence observedStrong flavor Dependence observed
(deg.)
valleypeak
PHENIX Preliminary
Hadron meson mesonHadron baryon baryon
(deg.)
Away peak
PHENIX Preliminary
Peak/Valley on ridge Axis Away Peak Position on Diagonal Axis
Hadron Hadron HadronHadron Hadron Hadron
HBB Flatter than HMMHBB Flatter than HMM Away Peak around 2 RadiansAway Peak around 2 Radians
Ridge axesRidge axes
Ridge peak to valley ratioRidge peak to valley ratio
Ridge axesRidge axes
Hadron-Hadron-Hadron
Bending Jet simulation
Cherenkov Jetsimulation
datadata
N. N. Ajitanand, ISMD05 24
Extinction method on two particle correlations
Polar plot wrt leading particle axis
Express associated particle direction as theta,phi in frame with leading particle vector as z-axis
Plot theta along radial axis
Plot phi along azimuthal axis
LPLP
N. N. Ajitanand, ISMD05 25
The Polar view The Polar view The Polar view The Polar view Cherenkov only in full acceptance
Cherenkov only in PHENIX
Flip away-sideCherenkov
Sim
ula
tion
Sim
ula
tion
SummarySummarySummarySummary
Novel methodologies developed to remove Novel methodologies developed to remove Harmonic contributionHarmonic contributionss and extract jet functions from and extract jet functions from Azimuthal CorrelationAzimuthal Correlation functions. functions.
Jet Jet ffunction unction and yields show and yields show sstrong dependence trong dependence on particle flavoron particle flavor
The jet landscape for three particle correlations obtained as a functionThe jet landscape for three particle correlations obtained as a functionof Centrality, pt and flavor of Centrality, pt and flavor
• CComparisonomparisonss to simulation to simulations indicates indicate “Mach cone” “Mach cone” like features in like features in Jet landJet land--scapescape for wide range of pT and centralities for wide range of pT and centralities Cone angle possibly related to sound speed, refractive Cone angle possibly related to sound speed, refractive index … etcindex … etc
• Hadron Baryon Baryon jet-scape flatter than Hadron Meson Meson
• Away side baryon/meson ratio 2X larger than near side Away side baryon/meson ratio 2X larger than near side baryon/meson ratiobaryon/meson ratio
• Proton anti-proton yields non-zero only on near side Proton anti-proton yields non-zero only on near side