PH ENIX - Brookhaven National Laboratory...Jun 10, 2010 · AB 6q 0 0.5 1 1.5 2 2.5 3) (arb. units)...
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Thesis Flash Talk Michael P. McCumber Advisor: Barbara Jacak RHIC/Users Meeting 10 June 2010 PH ENIX
Transcript of PH ENIX - Brookhaven National Laboratory...Jun 10, 2010 · AB 6q 0 0.5 1 1.5 2 2.5 3) (arb. units)...
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Thesis Flash TalkMichael P. McCumberAdvisor: Barbara Jacak
RHIC/Users Meeting10 June 2010
PH ENIX
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Thank you! 2
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Hard Scattering and Jets 3
Au
Au
Physics Motivation:Jet Reconstruction
parton
Two Particle Correlation
■ Energy loss■ Production geometry■ Medium excitations
Δϕ, Δη
Δϕ
= ≈
= =
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The Division of Labor 4
Higher pair momentum: p{A,B}T � 4 GeV/c
Explore:fast parton survival
Learn:initial deposit geometryenergy loss characteristics
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The Division of Labor 4
Higher pair momentum: p{A,B}T � 4 GeV/c
Explore:fast parton survival
Learn:initial deposit geometryenergy loss characteristics
Lower pair momentum: p{A,B}T � 4 GeV/c
Explore:medium responseor triangular flow
Learn:production mechanismsmedium properties
)J(
0
0.01
0.02
0.03
0.04
Au+Au 200 GeV 5-10%
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Energy Loss 5
AB
0 0.5 1 1.5 2 2.5 3
) (ar
b. u
nits
)A
BJ(
-0.2
0
0.2
0.4
0.6
0.8
1
1.20 [4.0,7.0] GeV
TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
= 0.66(3)
]°,15° [0| A
-|]°,90° [75|
A-|
-
Energy Loss 5
AB
0 0.5 1 1.5 2 2.5 3
) (ar
b. u
nits
)A
BJ(
-0.2
0
0.2
0.4
0.6
0.8
1
1.20 [4.0,7.0] GeV
TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
= 0.66(3)
]°,15° [0| A
-|]°,90° [75|
A-|
-
Energy Loss 5
AB
0 0.5 1 1.5 2 2.5 3
) (ar
b. u
nits
)A
BJ(
-0.2
0
0.2
0.4
0.6
0.8
1
1.20 [4.0,7.0] GeV
TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
= 0.66(3)
]°,15° [0| A
-|]°,90° [75|
A-|
(rad)s0 0.2 0.4 0.6 0.8 1 1.2 1.4
Nea
r PTY
(arb
. uni
ts)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
]183 [0,
0.06 (stat+sys)± = 0.94 in/PTYoutPTY
-correctedrp
0 [4.0,7.0] GeV TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
in-plane out-plane
insignificant near-side trend
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Energy Loss 5
AB
0 0.5 1 1.5 2 2.5 3
) (ar
b. u
nits
)A
BJ(
-0.2
0
0.2
0.4
0.6
0.8
1
1.20 [4.0,7.0] GeV
TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
= 0.66(3)
]°,15° [0| A
-|]°,90° [75|
A-|
(rad)s0 0.2 0.4 0.6 0.8 1 1.2 1.4
Aw
ay P
TY (a
rb. u
nits
)
-0.05
0
0.05
0.1
0.15
Renk - Phys.Rev.C78:034904,2008Pantuev - private communication
],97 [
0.25 (stat+sys)± = 0.60 in/PTYoutPTY
-correctedrp
0 [4.0,7.0] GeV TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
in-plane out-plane
falling away-side trend
(rad)s0 0.2 0.4 0.6 0.8 1 1.2 1.4
Nea
r PTY
(arb
. uni
ts)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
]183 [0,
0.06 (stat+sys)± = 0.94 in/PTYoutPTY
-correctedrp
0 [4.0,7.0] GeV TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
in-plane out-plane
insignificant near-side trend
-
Energy Loss 5
AB
0 0.5 1 1.5 2 2.5 3
) (ar
b. u
nits
)A
BJ(
-0.2
0
0.2
0.4
0.6
0.8
1
1.20 [4.0,7.0] GeV
TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
= 0.66(3)
]°,15° [0| A
-|]°,90° [75|
A-|
(rad)s0 0.2 0.4 0.6 0.8 1 1.2 1.4
Aw
ay P
TY (a
rb. u
nits
)
-0.05
0
0.05
0.1
0.15
Renk - Phys.Rev.C78:034904,2008Pantuev - private communication
],97 [
0.25 (stat+sys)± = 0.60 in/PTYoutPTY
-correctedrp
0 [4.0,7.0] GeV TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
in-plane out-plane
falling away-side trend
(rad)s0 0.2 0.4 0.6 0.8 1 1.2 1.4
Nea
r PTY
(arb
. uni
ts)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
]183 [0,
0.06 (stat+sys)± = 0.94 in/PTYoutPTY
-correctedrp
0 [4.0,7.0] GeV TAp
± [3.0,4.0] GeV h TBp
= 200 GeV - Cent 20-60%NNsAu+Au
in-plane out-plane
insignificant near-side trend
■ a large initial anisotropy or ■ a large path-length dependence
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Lower pT Correlations 6
D
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Lower pT Correlations 6
rms
(rad
) or k
urto
sis
1
2
3
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Lower pT Correlations 6
rms
(rad
) or k
urto
sis
1
2
3
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Lower pT Correlations 6
rms
(rad
) or k
urto
sis
1
2
3
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Description 7
Money plot #1: Fake rate against real jet rate to define the momentum range where fakes contribute
Goal #1: “What is the rate of fake jets in a central Au+Au collisions after average background energy (pedestal) is removed?”
Procedure: (1) Embed Pythia jet events into central (b=4.5) Au+Au Hijing Events
+ Hijing hard scattering limit set to 5 GeV/c (so there are no jets)+ FastJet AntiKt R=0.3
(2) Reconstruct jets with and without Hijing particles (3) Characterize the average excess pT and rms from jet put in Hijing
(4) Subtract average excess
Goal #2: “What is the intrinsic smearing from background fluctuations for real jets in a heavy ion collision?”
Money plot #2: Intrinsic jet pT RMS from background
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