Elliptic flow in Au+Au collisions at square root(S)NN = 130 GeV.
Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at square root(S)NN = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.
Ackermann
K H
KH
Argone National Laboratory, Illinois 60439, USA.
Adams
N
N
Adler
C
C
Ahammed
Z
Z
Ahmad
S
S
Allgower
C
C
Amsbaugh
J
J
Anderson
M
M
Anderssen
E
E
Arnesen
H
H
Arnold
L
L
Averichev
G S
GS
Baldwin
A
A
Balewski
J
J
Barannikova
O
O
Barnby
L S
LS
Baudot
J
J
Beddo
M
M
Bekele
S
S
Belaga
V V
VV
Bellwied
R
R
Bennett
S
S
Bercovitz
J
J
Berger
J
J
Betts
W
W
Bichsel
H
H
Bieser
F
F
Bland
L C
LC
Bloomer
M
M
Blyth
C O
CO
Boehm
J
J
Bonner
B E
BE
Bonnet
D
D
Bossingham
R
R
Botlo
M
M
Boucham
A
A
Bouillo
N
N
Bouvier
S
S
Bradley
K
K
Brady
F P
FP
Braithwaite
E S
ES
Braithwaite
W
W
Brandin
A
A
Brown
R L
RL
Brugalette
G
G
Byrd
C
C
Caines
H
H
Calderón de la Barca Sánchez
M
M
Cardenas
A
A
Carr
L
L
Carroll
J
J
Castillo
J
J
Caylor
B
B
Cebra
D
D
Chatopadhyay
S
S
Chen
M L
ML
Chen
W
W
Chen
Y
Y
Chernenko
S P
SP
Cherney
M
M
Chikanian
A
A
Choi
B
B
Chrin
J
J
Christie
W
W
Coffin
J P
JP
Conin
L
L
Consiglio
C
C
Cormier
T M
TM
Cramer
J G
JG
Crawford
H J
HJ
Danilov
V I
VI
Dayton
D
D
DeMello
M
M
Deng
W S
WS
Derevschikov
A A
AA
Dialinas
M
M
Diaz
H
H
DeYoung
P A
PA
Didenko
L
L
Dimassimo
D
D
Dioguardi
J
J
Dominik
W
W
Drancourt
C
C
Draper
J E
JE
Dunin
V B
VB
Dunlop
J C
JC
Eckardt
V
V
Edwards
W R
WR
Efimov
L G
LG
Eggert
T
T
Emelianov
V
V
Engelage
J
J
Eppley
G
G
Erazmus
B
B
Etkin
A
A
Fachini
P
P
Feliciano
C
C
Ferenc
D
D
Ferguson
M I
MI
Fessler
H
H
Finch
E
E
Fine
V
V
Fisyak
Y
Y
Flierl
D
D
Flores
I
I
Foley
K J
KJ
Fritz
D
D
Gagunashvili
N
N
Gans
J
J
Gazdzicki
M
M
Germain
M
M
Geurts
F
F
Ghazikhanian
V
V
Gojak
C
C
Grabski
J
J
Grachov
O
O
Grau
M
M
Greiner
D
D
Greiner
L
L
Grigoriev
V
V
Grosnick
D
D
Gross
J
J
Guilloux
G
G
Gushin
E
E
Hall
J
J
Hallman
T J
TJ
Hardtke
D
D
Harper
G
G
Harris
J W
JW
He
P
P
Heffner
M
M
Heppelmann
S
S
Herston
T
T
Hill
D
D
Hippolyte
B
B
Hirsch
A
A
Hjort
E
E
Hoffmann
G W
GW
Horsley
M
M
Howe
M
M
Huang
H Z
HZ
Humanic
T J
TJ
Hümmler
H
H
Hunt
W
W
Hunter
J
J
Igo
G J
GJ
Ishihara
A
A
Ivanshin
Y I
YI
Jacobs
P
P
Jacobs
W W
WW
Jacobson
S
S
Jared
R
R
Jensen
P
P
Johnson
I
I
Jones
P G
PG
Judd
E
E
Kaneta
M
M
Kaplan
M
M
Keane
D
D
Kenney
V P
VP
Khodinov
A
A
Klay
J
J
Klein
S R
SR
Klyachko
A
A
Koehler
G
G
Konstantinov
A S
AS
Kormilitsyne
V
V
Kotchenda
L
L
Kotov
I
I
Kovalenko
A D
AD
Kramer
M
M
Kravtsov
P
P
Krueger
K
K
Krupien
T
T
Kuczewski
P
P
Kuhn
C
C
Kunde
G J
GJ
Kunz
C L
CL
Kutuev
R K
RK
Kuznetsov
A A
AA
Lakehal-Ayat
L
L
Lamas-Valverde
J
J
Lamont
M A
MA
Landgraf
J M
JM
Lange
S
S
Lansdell
C P
CP
Lasiuk
B
B
Laue
F
F
Lebedev
A
A
LeCompte
T
T
Leonhardt
W J
WJ
Leontiev
V M
VM
Leszczynski
P
P
LeVine
M J
MJ
Li
Q
Q
Li
Q
Q
Li
Z
Z
Liaw
C J
CJ
Lin
J
J
Lindenbaum
S J
SJ
Lindenstruth
V
V
Lindstrom
P J
PJ
Lisa
M A
MA
Liu
H
H
Ljubicic
T
T
Llope
W J
WJ
LoCurto
G
G
Long
H
H
Longacre
R S
RS
Lopez-Noriega
M
M
Lopiano
D
D
Love
W A
WA
Lutz
J R
JR
Lynn
D
D
Madansky
L
L
Maier
R
R
Majka
R
R
Maliszewski
A
A
Margetis
S
S
Marks
K
K
Marstaller
R
R
Martin
L
L
Marx
J
J
Matis
H S
HS
Matulenko
Y A
YA
Matyushevski
E A
EA
McParland
C
C
McShane
T S
TS
Meier
J
J
Melnick
Y
Y
Meschanin
A
A
Middlekamp
P
P
Mikhalin
N
N
Miller
B
B
Milosevich
Z
Z
Minaev
N G
NG
Minor
B
B
Mitchell
J
J
Mogavero
E
E
Moiseenko
V A
VA
Moltz
D
D
Moore
C F
CF
Morozov
V
V
Morse
R
R
de Moura
M M
MM
Munhoz
M G
MG
Mutchler
G S
GS
Nelson
J M
JM
Nevski
P
P
Ngo
T
T
Nguyen
M
M
Nguyen
T
T
Nikitin
V A
VA
Nogach
L V
LV
Noggle
T
T
Norman
B
B
Nurushev
S B
SB
Nussbaum
T
T
Nystrand
J
J
Odyniec
G
G
Ogawa
A
A
Ogilvie
C A
CA
Olchanski
K
K
Oldenburg
M
M
Olson
D
D
Ososkov
G A
GA
Ott
G
G
Padrazo
D
D
Paic
G
G
Pandey
S U
SU
Panebratsev
Y
Y
Panitkin
S Y
SY
Pavlinov
A I
AI
Pawlak
T
T
Pentia
M
M
Perevotchikov
V
V
Peryt
W
W
Petrov
V A
VA
Pinganaud
W
W
Pirogov
S
S
Platner
E
E
Pluta
J
J
Polk
I
I
Porile
N
N
Porter
J
J
Poskanzer
A M
AM
Potrebenikova
E
E
Prindle
D
D
Pruneau
C
C
Puskar-Pasewicz
J
J
Rai
G
G
Rasson
J
J
Ravel
O
O
Ray
R L
RL
Razin
S V
SV
Reichhold
D
D
Reid
J
J
Renfordt
R E
RE
Retiere
F
F
Ridiger
A
A
Riso
J
J
Ritter
H G
HG
Roberts
J B
JB
Roehrich
D
D
Rogachevski
O V
OV
Romero
J L
JL
Roy
C
C
Russ
D
D
Rykov
V
V
Sakrejda
I
I
Sanchez
R
R
Sandler
Z
Z
Sandweiss
J
J
Sappenfield
P
P
Saulys
A C
AC
Savin
I
I
Schambach
J
J
Scharenberg
R P
RP
Scheblien
J
J
Scheetz
R
R
Schlueter
R
R
Schmitz
N
N
Schroeder
L S
LS
Schulz
M
M
Schüttauf
A
A
Sedlmeir
J
J
Seger
J
J
Seliverstov
D
D
Seyboth
J
J
Seyboth
P
P
Seymour
R
R
Shakaliev
E I
EI
Shestermanov
K E
KE
Shi
Y
Y
Shimanskii
S S
SS
Shuman
D
D
Shvetcov
V S
VS
Skoro
G
G
Smirnov
N
N
Smykov
L P
LP
Snellings
R
R
Solberg
K
K
Sowinski
J
J
Spinka
H M
HM
Srivastava
B
B
Stephenson
E J
EJ
Stock
R
R
Stolpovsky
A
A
Stone
N
N
Stone
R
R
Strikhanov
M
M
Stringfellow
B
B
Stroebele
H
H
Struck
C
C
Suaide
A A
AA
Sugarbaker
E
E
Suire
C
C
Symons
T J
TJ
Takahashi
J
J
Tang
A H
AH
Tarchini
A
A
Tarzian
J
J
Thomas
J H
JH
Tikhomirov
V
V
Szanto De Toledo
A
A
Tonse
S
S
Trainor
T
T
Trentalange
S
S
Tokarev
M
M
Tonjes
M B
MB
Trofimov
V
V
Tsai
O
O
Turner
K
K
Ullrich
T
T
Underwood
D G
DG
Vakula
I
I
Van Buren
G
G
VanderMolen
A M
AM
Vanyashin
A
A
Vasilevski
I M
IM
Vasiliev
A N
AN
Vigdor
S E
SE
Visser
G
G
Voloshin
S A
SA
Vu
C
C
Wang
F
F
Ward
H
H
Weerasundara
D
D
Weidenbach
R
R
Wells
R
R
Wells
R
R
Wenaus
T
T
Westfall
G D
GD
Whitfield
J P
JP
Whitten
C
C
Wieman
H
H
Willson
R
R
Wilson
K
K
Wirth
J
J
Wisdom
J
J
Wissink
S W
SW
Witt
R
R
Wolf
J
J
Wood
L
L
Xu
N
N
Xu
Z
Z
Yakutin
A E
AE
Yamamoto
E
E
Yang
J
J
Yepes
P
P
Yokosawa
A
A
Yurevich
V I
VI
Zanevski
Y V
YV
Zhang
J
J
Zhang
W M
WM
Zhu
J
J
Zimmerman
D
D
Zoulkarneev
R
R
Zubarev
A N
AN