Transcript Putting a New Spin on Things: The PHENIX Forward Upgrade

PHENIX Highlights II
Photons, Hadronization and Thermalization
Matthias Grosse Perdekamp – UIUC and RBRC
for the PHENIX Collaboration
I: Propagation of Partons in a Colored Medium
John Lajoie, Iowa State University
II: Photons, Hadronization and Thermalization
Photons
Thermalization
Di-Leptons
The Baryon Anomaly
Quark Matter 2006 - Shanghai, China - Slide 1
From Budapest to Shanghai
Partonic Matter: PHENIX Evidence Published
(1) Centrality dependence of direct photon production in √s = 200 GeV Au + Au collisions
Phys.Rev.Lett.94:232301,2005
(2) Modifications to di-jet hadron pair correlations in Au+Au collisions at √s = 200 GeV
Phys.Rev.Lett.97:052301,2006
(3) J/psi production and nuclear effects for d+Au and p+p collisions at √sNN = 200 GeV
Phys.Rev.Lett.96:012304,2006
(4) Single electrons from heavy flavor decays in p+p collisions at √s = 200-GeV
Phys.Rev.Lett.96:032001,2006
(5) Measurement of identified π0 and inclusive photon v2 and implication to the direct
photon production in √sNN = 200-GeV Au+Au collisions.
Phys.Rev.Lett.96:032302,2006
(6) Jet structure from di-hadron correlations in d+Au collisions at √sNN = 200-GeV
Phys.Rev.C73:054903,2006.
(7) Nuclear modification of electron spectra and implications for heavy quark
energy loss in Au+Au collisions at √sNN = 200 GeV
Phys.Rev.Lett.96:032301,2006
(8) Common suppression pattern of eta and π0 mesons at high transverse momentum
in Au+Au collisions at √SNN = 200 GeV
Phys.Rev.Lett.96:202301,2006
(9) Nuclear effects on hadron production in d+Au and p+p collisions at √sNN = 200 GeV
Phys.Rev.C74:024904,2006
(10) Azimuthal angle correlations for rapidity separated hadron pairs in d + Au
Collisions at √sNN = 200-GeV
Phys.Rev.Lett.96:222301,2006
(11) Jet properties from di-hadron correlations in p+p collisions at √s = 200 GeV
Phys.Rev.D74:072002,2006
Quark Matter 2006 - Shanghai, China - Slide 2
Quark Matter 2006: Exploring the matter
New PHENIX Results
(1) Measurement of direct photon production in p + p collisions at √s = 200 GeV.
hep-ex/0609031
(2) Measurement of single muons at forward rapidity in p+p collisions at
√s = 200-GeV and implications for charm production.
hep-ex/0609032
Quark Matter 2006 - Shanghai, China - Slide 3
The past week on nucl-ex …
(3) High transverse momentum eta meson production in p+p, d+Au and Au+Au
collisions at √sNN = 200 GeV
nucl-ex/0611006
(4) A detailed study of high-pT neutral pion suppression and azimuthal
anisotropy in Au+Au collisions at √sNN = 200 GeV
nucl-ex/0611007
(5) Energy loss and flow of heavy quarks in Au+Au collisions at √sNN = 200 GeV
nucl-ex/0611018
(6) J/psi production in p+p collisions at √s = 200 GeV
nucl-ex/0611020
(7) System size and energy dependence of jet induced hadron pair correlation
shapes in Cu-Cu and Au-Au collisions at √sNN = 200 GeV
nucl-ex/0611019
(8) J/psi production in Au+Au collisions at √s = 200 GeV
nucl-ex/0611020
(9) Pair production of protons and anti-protons in Au+Au Collisions at √sNN = 200 GeV
nucl-ex/0611016
Nov. 9
Exploring Partonic Matter with High
Luminosity in PHENIX
2006
Driven by growing interest:
Hadron Blind Detector
low mass di-electrons
Participants
Reaction Plane Detector Year --- Institutions
improved---reaction
plane eg. v2(γ)
2001
53
TOF-West
hadron anomaly420
2003
57
460
complete
Forward EMC (MPC)
low x, initial state
2006
68
550
2006- 2009
Silicon Vertex Tracker
heavy quark physics, jets
Muon trigger
heavy flavor trigger
funded
2008 – 2011
Forward Vertex Tracker
Nosecone Calorimeter
PHENIX
upgrades
heavy quark physics, jets
jets, γ-jet, heavy quark physics
RHIC II  10 x Luminosity
Quark Matter 2006 - Shanghai, China - Slide 4
The PHENIX Collaboration
QM 2006
20 talks
45 posters
Quark Matter 2006 - Shanghai, China - Slide 5
Run 4 ∫Ldt Extends Direct Photons
Tadaaki Isobe Sun 2:00pm
Direct Photon Spectra vs Centrality
extend to high pT
1 < pT < 20 GeV
Min. Bias
0-10%
high pT
Quark Matter 2006 - Shanghai, China - Slide 6
08-92%
Direct g RAA at 200 GeV
Tadaaki Isobe Sun 2:00pm
Direct g RAA with measured
p+p reference data
η
π0
Quark Matter 2006 - Shanghai, China - Slide 7
Direct Photons at Low pT
QM 2005: Data consistent with
thermal+ NLO pQCD
pQCD
uncertain at low pT
Gordon and Vogelsang
Phys. Rev. D48, 3136 (1993)
Thermal d’Enterria, Perresounko
Eur.Phys.J.C46:451-464,2006
(a) New experimental method for the
measurement of direct photons
 external conversion from beam pipe
(b) p-p and d-Au reference data: work in
progress.
Quark Matter 2006 - Shanghai, China - Slide 8
Low pT  new conversion method
Dmitri Peressounko, Sat 5:20pm
Direct Photons, Au+Au at 200 GeV
o New measurement with
external conversions
External conversions
o Improved systematics
Internal Conversions
o Agreement with
previous results
Quark Matter 2006 - Shanghai, China - Slide 9
Photons
o Extended range to high and low pT
o Previous low pT analysis confirmed
o Started jet-photon correlations
Quark Matter 2006 - Shanghai, China - Slide 10
Flow for Light Hadrons is “Perfect”
Arkadij Taranenko Sun 2:20 pm
pT  KET
v2 scales with the
transverse kinetic
energy!
Quark Matter 2006 - Shanghai, China - Slide 11
Flow: Light Quarks → Strange → Charm
Arkadij Taranenko Sun 2:20 pm
• Scaling flow parameters by quark
content nq resolves
meson-baryon separation of final state
hadrons
Quark Matter 2006 - Shanghai, China - Slide 12
baryons
mesons
Flow: Light Quarks → Strange → Charm
Arkadij Taranenko Sun 2:20 pm
mesons vs baryons  flow scales with nq
Quark Matter 2006 - Shanghai, China - Slide 13
Flow: Light Quarks → Strange → Charm
Shingo Sakai Sat 5:20pm
(1) Consistent with c-quark thermalization
[Phys.Lett. B595 202-208 ]
(2) large cross section is needed in AMPT ~10 mb [PRC72,024906]
(3) Resonance state of D & B in sQGP [PRC73,034913]
 indicates quark level thermalization & strong coupling
Quark Matter 2006 - Shanghai, China - Slide 14
Flow
o Scaling properties consistent with
ideal fluid hydrodynamics
o Consistent with quark level thermalization
and strong coupling
o Observe flow for light, strange,
and charm quarks
q What else can we do with charm ?
Quark Matter 2006 - Shanghai, China - Slide 15
Di-Leptons in the Intermediate Region (IMR)
Sarah Campbell, Sun 5:20pm
cc ee
• data
IMR
Quark Matter 2006 - Shanghai, China - Slide 16
Sarah Campbell, Sun 5:20pm
Di-lepton pairs:
Centrality Dependence
0-10% -- central
PHENIX Preliminary
60-100% -- peripheral
PHENIX Preliminary
Quark Matter 2006 - Shanghai, China - Slide 17
Nuclear Modification in Charm
Sarah Campbell, Sun 5:20pm
RCP for 1.4 < mee < 2.8 GeV/c2, Au-Au
• Dielectron: RCP in
Charm Region
1.4< mee < 2.8 GeV/c2
• Single Electron: RAA
at low and high pT
• Similar charm
suppression patterns
Quark Matter 2006 - Shanghai, China - Slide
New to Quark Matter 2006
18
Nuclear Modification in Charm
RCP for 1.4 < mee < 2.8 GeV/c2, Au-Au
Sarah Campbell, Sun 5:20pm
• Dielectron: RCP
in Charm
Region1.4<mee
< 2.8 GeV/c2
• J/Psi: RAA
• Similar charm
suppression
patterns
PHENIX preliminary
Quark Matter 2006 - Shanghai, China - Slide
New to Quark Matter 2006
19
ω 
p+p
e+e-,
0
+
π π π ,π0γ
d+Au
in pp, dAu and AuAu
Yuriy Riabov, Sun 2:20pm
0g Au+Au √sNN=200 GeV
hadronic
0+- (0g) p+p √s =200 GeV d+Au √sNN =200 GeV
Au+Au
leptonic
ρ,ω,
 e+e- p+p √s=200 GeV
ω e+e- Au+Au √sNN=200 GeV
PHENIX Preliminary
PHENIX mapped out high pT ω in p+p, d+Au & produced a first result in Au+Au
Quark
Matteryet,
2006but
- Shanghai,
China there
- Slide 20
ω, e+e- in p+p are not
ready
the signal
is very clean
Di-Leptons
o First centrality dependence available
o Charm suppression in this channel
o Omega and Phi spectra
Quark Matter 2006 - Shanghai, China - Slide 21
Multiplicity Fluctuation: Universal Scaling
All points are scaled to match the 200 GeV
Au+Au data curve to illustrate the scaling.
Jeff Mitchell, Sun 5:00pm
0.2<pT<2.0 GeV/c
s2/m2 α Npart-1.40±0.03
0.2<pT<0.75 GeV/c
Quark Matter 2006 - Shanghai, China - Slide 22
Medium Properties: Source Size
Poster: Akitomo Enokizono
• Pion radii scale w/ mult. across system/energy
Matter 2006 - Shanghai,
China - Slide 23
• Consistent withQuark
freeze-out
scenario
p/ vs centrality, Au+Au, √s = 200 GeV
Increased ∫Ldt and PID
p/
Masahiro Konno, Sun 2:20 pm
p/
- p/ (pbar/) ratios seem to turn over at intermediate pT,
and close to the value of fragmentation at higher pT.
- Consitent with expectations from recombination
- Indicating transition from soft to hard at intermediate pT.
Quark Matter 2006 - Shanghai, China - Slide 24
p/
+
p/
ratios vs sNN, central
Tatsuya Chujo, Sat 3:00 pm
Ratios constant in pp
p/- increases in AA
p/+ decreases in AA
vs √s
Quark Matter 2006 - Shanghai, China - Slide 25
_
p & p Near Side Correlations
Baryon Associated with p-p pairs
Anne Sickles, Wed. 4:00 pm
opposite sign pairs:
CORRELATED
same sign pairs:
NO CORRELATION
_
1.8  pT (assoc.)  2.5  pT (trig.)  4.0 GeV / c
Quark Matter 2006 - Shanghai, China - Slide 26
0 RAA in Cu+Cu at different √sNN
Baldo Sahlmueller, Sun 2:00pm
RHIC
High luminosity +
flexibility to vary
collisions systems
+ energies
Comparison of 0 in
Cu+Cu for 22, 62, 200 GeV
Suppression increases
Quark Matter 2006 - Shanghai, China - Slide
with energy
27
Conclusions
Direct Photons
Extended range to high and low pT
Previous low pT analysis confirmed
Started Jet photon correlations
Flow
Observed flow for light, strange, and charm quarks
Observed scaling properties consistent
with ideal fluid hydrodynamics
Di-Leptons
First centrality dependence available
Charm suppression in this channel ?
Baryon anomaly
Baryon/meson studies extended to hard region,
ratio returns to vacuum expectation
PHENIX is well positioned to explore the sQGP with
high luminosity and improved detector capabilities
Quark Matter 2006 - Shanghai, China - Slide 28