| author name | recommending | commenting | favorite | papers | recom. | cited | |
|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 22 | 0 | 7 | [Update] |
Latest Paper:
A Adare,
S Afanasiev,
C Aidala,
N N Ajitanand,
Y Akiba,
H Al-Bataineh,
J Alexander,
K Aoki,
Y Aramaki,
E T Atomssa,
R Averbeck,
T C Awes,
B Azmoun,
V Babintsev,
M Bai,
G Baksay,
L Baksay,
K N Barish,
B Bassalleck,
A T Basye,
S Bathe,
V Baublis,
C Baumann,
A Bazilevsky,
S Belikov,
R Belmont,
R Bennett,
A Berdnikov,
Y Berdnikov,
A A Bickley,
J S Bok,
K Boyle,
M L Brooks,
H Buesching,
V Bumazhnov,
G Bunce,
S Butsyk,
C M Camacho,
S Campbell,
C-H Chen,
C Y Chi,
M Chiu,
I J Choi,
R K Choudhury,
P Christiansen,
T Chujo,
P Chung,
O Chvala,
V Cianciolo,
Z Citron,
B A Cole,
M Connors,
P Constantin,
M Csanád,
T Csörgő,
T Dahms,
S Dairaku,
I Danchev,
K Das,
A Datta,
G David,
A Denisov,
A Deshpande,
E J Desmond,
O Dietzsch,
A Dion,
M Donadelli,
O Drapier,
A Drees,
K A Drees,
J M Durham,
A Durum,
D Dutta,
S Edwards,
Y V Efremenko,
F Ellinghaus,
T Engelmore,
A Enokizono,
H En'yo,
S Esumi,
B Fadem,
D E Fields,
M Finger,
M Finger Jr,
F Fleuret,
S L Fokin,
Z Fraenkel,
J E Frantz,
A Franz,
A D Frawley,
K Fujiwara,
Y Fukao,
T Fusayasu,
I Garishvili,
A Glenn,
H Gong,
M Gonin,
Y Goto,
R Granier de Cassagnac,
N Grau,
S V Greene,
M Grosse Perdekamp,
T Gunji,
H-Å Gustafsson,
J S Haggerty,
K I Hahn,
H Hamagaki,
J Hamblen,
R Han,
J Hanks,
E P Hartouni,
E Haslum,
R Hayano,
X He,
M Heffner,
T K Hemmick,
T Hester,
J C Hill,
M Hohlmann,
W Holzmann,
K Homma,
B Hong,
T Horaguchi,
D Hornback,
S Huang,
T Ichihara,
R Ichimiya,
J Ide,
Y Ikeda,
K Imai,
M Inaba,
D Isenhower,
M Ishihara,
T Isobe,
M Issah,
A Isupov,
D Ivanischev,
B V Jacak,
J Jia,
J Jin,
B M Johnson,
K S Joo,
D Jouan,
D S Jumper,
F Kajihara,
S Kametani,
N Kamihara,
J Kamin,
J H Kang,
J Kapustinsky,
K Karatsu,
D Kawall,
M Kawashima,
A V Kazantsev,
T Kempel,
A Khanzadeev,
K M Kijima,
B I Kim,
D H Kim,
D J Kim,
E Kim,
E J Kim,
S H Kim,
Y J Kim,
E Kinney,
K Kiriluk,
A Kiss,
E Kistenev,
L Kochenda,
B Komkov,
M Konno,
J Koster,
D Kotchetkov,
A Kozlov,
A Král,
A Kravitz,
G J Kunde,
K Kurita,
M Kurosawa,
Y Kwon,
G S Kyle,
R Lacey,
Y S Lai,
J G Lajoie,
A Lebedev,
D M Lee,
J Lee,
K Lee,
K B Lee,
K S Lee,
M J Leitch,
M A L Leite,
E Leitner,
B Lenzi,
X Li,
P Liebing,
L A Linden Levy,
T Liška,
A Litvinenko,
H Liu,
M X Liu,
B Love,
R Luechtenborg,
D Lynch,
C F Maguire,
Y I Makdisi,
A Malakhov,
M D Malik,
V I Manko,
E Mannel,
Y Mao,
H Masui,
F Matathias,
M McCumber,
P L McGaughey,
N Means,
B Meredith,
Y Miake,
A C Mignerey,
P Mikeš,
K Miki,
A Milov,
M Mishra,
J T Mitchell,
A K Mohanty,
Y Morino,
A Morreale,
D P Morrison,
T V Moukhanova,
J Murata,
S Nagamiya,
J L Nagle,
M Naglis,
M I Nagy,
I Nakagawa,
Y Nakamiya,
T Nakamura,
K Nakano,
J Newby,
M Nguyen,
R Nouicer,
A S Nyanin,
E O'Brien,
S X Oda,
C A Ogilvie,
M Oka,
K Okada,
Y Onuki,
A Oskarsson,
M Ouchida,
K Ozawa,
R Pak,
V Pantuev,
V Papavassiliou,
I H Park,
J Park,
S K Park,
W J Park,
S F Pate,
H Pei,
J-C Peng,
H Pereira,
V Peresedov,
D Yu Peressounko,
C Pinkenburg,
R P Pisani,
M Proissl,
M L Purschke,
A K Purwar,
H Qu,
J Rak,
A Rakotozafindrabe,
I Ravinovich,
K F Read,
K Reygers,
V Riabov,
Y Riabov,
E Richardson,
D Roach,
G Roche,
S D Rolnick,
M Rosati,
C A Rosen,
S S E Rosendahl,
P Rosnet,
P Rukoyatkin,
P Ružička,
B Sahlmueller,
N Saito,
T Sakaguchi,
K Sakashita,
V Samsonov,
S Sano,
T Sato,
S Sawada,
K Sedgwick,
J Seele,
R Seidl,
A Yu Semenov,
R Seto,
D Sharma,
I Shein,
T-A Shibata,
K Shigaki,
M Shimomura,
K Shoji,
P Shukla,
A Sickles,
C L Silva,
D Silvermyr,
C Silvestre,
K S Sim,
B K Singh,
C P Singh,
V Singh,
M Slunečka,
R A Soltz,
W E Sondheim,
S P Sorensen,
I V Sourikova,
N A Sparks,
P W Stankus,
E Stenlund,
S P Stoll,
T Sugitate,
A Sukhanov,
J Sziklai,
E M Takagui,
A Taketani,
R Tanabe,
Y Tanaka,
K Tanida,
M J Tannenbaum,
S Tarafdar,
A Taranenko,
P Tarján,
H Themann,
T L Thomas,
M Togawa,
A Toia,
L Tomášek,
H Torii,
R S Towell,
I Tserruya,
Y Tsuchimoto,
C Vale,
H Valle,
H W van Hecke,
E Vazquez-Zambrano,
A Veicht,
J Velkovska,
R Vértesi,
A A Vinogradov,
M Virius,
V Vrba,
E Vznuzdaev,
X R Wang,
D Watanabe,
K Watanabe,
Y Watanabe,
F Wei,
R Wei,
J Wessels,
S N White,
D Winter,
J P Wood,
C L Woody,
R M Wright,
M Wysocki,
W Xie,
Y L Yamaguchi,
K Yamaura,
R Yang,
A Yanovich,
J Ying,
S Yokkaichi,
Z You,
G R Young,
I Younus,
I E Yushmanov,
W A Zajc,
C Zhang,
S Zhou,
L Zolin
University of Colorado, Boulder, Colorado 80309, USA.
Flow coefficients v_{n} for n=2, 3, 4, characterizing the anisotropic collective flow in Au+Au collisions at sqrt[s_{NN}]=200 GeV, are measured relative to event planes Ψ_{n}, determined at large rapidity. We report v_{n} as a function of transverse momentum and collision centrality, and study the correlations among the event planes of different order n. The v_{n} are well described by hydrodynamic models which employ a Glauber Monte Carlo initial state geometry with fluctuations, providing additional constraining power on the interplay between initial conditions and the effects of viscosity as the system evolves. This new constraint can serve to improve the precision of the extracted shear viscosity to entropy density ratio η/s.
A Adare,
S Afanasiev,
C Aidala,
N N Ajitanand,
Y Akiba,
H Al-Bataineh,
J Alexander,
A Angerami,
K Aoki,
N Apadula,
L Aphecetche,
Y Aramaki,
J Asai,
E T Atomssa,
R Averbeck,
T C Awes,
B Azmoun,
V Babintsev,
M Bai,
G Baksay,
L Baksay,
A Baldisseri,
K N Barish,
P D Barnes,
B Bassalleck,
A T Basye,
S Bathe,
S Batsouli,
V Baublis,
C Baumann,
A Bazilevsky,
S Belikov,
R Belmont,
R Bennett,
A Berdnikov,
Y Berdnikov,
J H Bhom,
A A Bickley,
D S Blau,
J G Boissevain,
J S Bok,
H Borel,
K Boyle,
M L Brooks,
H Buesching,
V Bumazhnov,
G Bunce,
S Butsyk,
C M Camacho,
S Campbell,
A Caringi,
B S Chang,
W C Chang,
J-L Charvet,
C-H Chen,
S Chernichenko,
C Y Chi,
M Chiu,
I J Choi,
J B Choi,
R K Choudhury,
P Christiansen,
T Chujo,
P Chung,
A Churyn,
O Chvala,
V Cianciolo,
Z Citron,
B A Cole,
Z Conesa Del Valle,
M Connors,
P Constantin,
M Csanád,
T Csörgő,
T Dahms,
S Dairaku,
I Danchev,
K Das,
A Datta,
G David,
M K Dayananda,
A Denisov,
D d'Enterria,
A Deshpande,
E J Desmond,
K V Dharmawardane,
O Dietzsch,
A Dion,
M Donadelli,
O Drapier,
A Drees,
K A Drees,
A K Dubey,
J M Durham,
A Durum,
D Dutta,
V Dzhordzhadze,
L D'Orazio,
S Edwards,
Y V Efremenko,
F Ellinghaus,
T Engelmore,
A Enokizono,
H En'yo,
S Esumi,
K O Eyser,
B Fadem,
D E Fields,
M Finger,
M Finger Jr,
F Fleuret,
S L Fokin,
Z Fraenkel,
J E Frantz,
A Franz,
A D Frawley,
K Fujiwara,
Y Fukao,
T Fusayasu,
I Garishvili,
A Glenn,
H Gong,
M Gonin,
J Gosset,
Y Goto,
R Granier de Cassagnac,
N Grau,
S V Greene,
G Grim,
M Grosse Perdekamp,
T Gunji,
H-Å Gustafsson,
A Hadj Henni,
J S Haggerty,
K I Hahn,
H Hamagaki,
J Hamblen,
R Han,
J Hanks,
E P Hartouni,
K Haruna,
E Haslum,
R Hayano,
X He,
M Heffner,
T K Hemmick,
T Hester,
J C Hill,
M Hohlmann,
W Holzmann,
K Homma,
B Hong,
T Horaguchi,
D Hornback,
S Huang,
T Ichihara,
R Ichimiya,
H Iinuma,
Y Ikeda,
K Imai,
J Imrek,
M Inaba,
D Isenhower,
M Ishihara,
T Isobe,
M Issah,
A Isupov,
D Ivanischev,
Y Iwanaga,
B V Jacak,
J Jia,
X Jiang,
J Jin,
B M Johnson,
T Jones,
K S Joo,
D Jouan,
D S Jumper,
F Kajihara,
S Kametani,
N Kamihara,
J Kamin,
J H Kang,
J Kapustinsky,
K Karatsu,
M Kasai,
D Kawall,
M Kawashima,
A V Kazantsev,
T Kempel,
A Khanzadeev,
K M Kijima,
J Kikuchi,
A Kim,
B I Kim,
D H Kim,
D J Kim,
E Kim,
E J Kim,
S H Kim,
Y-J Kim,
E Kinney,
K Kiriluk,
A Kiss,
E Kistenev,
J Klay,
C Klein-Boesing,
L Kochenda,
B Komkov,
M Konno,
J Koster,
A Kozlov,
A Král,
A Kravitz,
G J Kunde,
K Kurita,
M Kurosawa,
M J Kweon,
Y Kwon,
G S Kyle,
R Lacey,
Y S Lai,
J G Lajoie,
D Layton,
A Lebedev,
D M Lee,
J Lee,
K B Lee,
K S Lee,
T Lee,
M J Leitch,
M A L Leite,
B Lenzi,
X Li,
P Lichtenwalner,
P Liebing,
L A Linden Levy,
T Liška,
A Litvinenko,
H Liu,
M X Liu,
B Love,
D Lynch,
C F Maguire,
Y I Makdisi,
A Malakhov,
M D Malik,
V I Manko,
E Mannel,
Y Mao,
L Mašek,
H Masui,
F Matathias,
M McCumber,
P L McGaughey,
D McGlinchey,
N Means,
B Meredith,
Y Miake,
T Mibe,
A C Mignerey,
P Mikeš,
K Miki,
A Milov,
M Mishra,
J T Mitchell,
A K Mohanty,
H J Moon,
Y Morino,
A Morreale,
D P Morrison,
T V Moukhanova,
D Mukhopadhyay,
T Murakami,
J Murata,
S Nagamiya,
J L Nagle,
M Naglis,
M I Nagy,
I Nakagawa,
Y Nakamiya,
K R Nakamura,
T Nakamura,
K Nakano,
S Nam,
J Newby,
M Nguyen,
M Nihashi,
T Niita,
R Nouicer,
A S Nyanin,
C Oakley,
E O'Brien,
S X Oda,
C A Ogilvie,
M Oka,
K Okada,
Y Onuki,
A Oskarsson,
M Ouchida,
K Ozawa,
R Pak,
A P T Palounek,
V Pantuev,
V Papavassiliou,
I H Park,
J Park,
S K Park,
W J Park,
S F Pate,
H Pei,
J-C Peng,
H Pereira,
V Peresedov,
D Yu Peressounko,
R Petti,
C Pinkenburg,
R P Pisani,
M Proissl,
M L Purschke,
A K Purwar,
H Qu,
J Rak,
A Rakotozafindrabe,
I Ravinovich,
K F Read,
S Rembeczki,
K Reygers,
V Riabov,
Y Riabov,
E Richardson,
D Roach,
G Roche,
S D Rolnick,
M Rosati,
C A Rosen,
S S E Rosendahl,
P Rosnet,
P Rukoyatkin,
P Ružička,
V L Rykov,
B Sahlmueller,
N Saito,
T Sakaguchi,
S Sakai,
K Sakashita,
V Samsonov,
S Sano,
T Sato,
S Sawada,
K Sedgwick,
J Seele,
R Seidl,
A Yu Semenov,
V Semenov,
R Seto,
D Sharma,
I Shein,
T-A Shibata,
K Shigaki,
M Shimomura,
K Shoji,
P Shukla,
A Sickles,
C L Silva,
D Silvermyr,
C Silvestre,
K S Sim,
B K Singh,
C P Singh,
V Singh,
M Slunečka,
A Soldatov,
R A Soltz,
W E Sondheim,
S P Sorensen,
I V Sourikova,
F Staley,
P W Stankus,
E Stenlund,
M Stepanov,
A Ster,
S P Stoll,
T Sugitate,
C Suire,
A Sukhanov,
J Sziklai,
E M Takagui,
A Taketani,
R Tanabe,
Y Tanaka,
S Taneja,
K Tanida,
M J Tannenbaum,
S Tarafdar,
A Taranenko,
P Tarján,
H Themann,
D Thomas,
T L Thomas,
M Togawa,
A Toia,
L Tomášek,
Y Tomita,
H Torii,
R S Towell,
V-N Tram,
I Tserruya,
Y Tsuchimoto,
C Vale,
H Valle,
H W van Hecke,
E Vazquez-Zambrano,
A Veicht,
J Velkovska,
R Vértesi,
A A Vinogradov,
M Virius,
A Vossen,
V Vrba,
E Vznuzdaev,
X R Wang,
D Watanabe,
K Watanabe,
Y Watanabe,
F Wei,
R Wei,
J Wessels,
S N White,
D Winter,
C L Woody,
R M Wright,
M Wysocki,
W Xie,
Y L Yamaguchi,
K Yamaura,
R Yang,
A Yanovich,
J Ying,
S Yokkaichi,
Z You,
G R Young,
I Younus,
I E Yushmanov,
W A Zajc,
O Zaudtke,
C Zhang,
S Zhou,
L Zolin
University of Colorado, Boulder, Colorado 80309, USA.
We present measurements of J/ψ yields in d+Au collisions at sqrt[s_{NN}]=200 GeV recorded by the PHENIX experiment and compare them with yields in p+p collisions at the same energy per nucleon-nucleon collision. The measurements cover a large kinematic range in J/ψ rapidity (-2.2<y<2.4) with high statistical precision and are compared with two theoretical models: one with nuclear shadowing combined with final state breakup and one with coherent gluon saturation effects. In order to remove model dependent systematic uncertainties we also compare the data to a simple geometric model. The forward rapidity data are inconsistent with nuclear modifications that are linear or exponential in the density weighted longitudinal thickness, such as those from the final state breakup of the bound state.
B Alver,
B B Back,
M D Baker,
M Ballintijn,
D S Barton,
R R Betts,
A A Bickley,
R Bindel,
W Busza,
A Carroll,
Z Chai,
M P Decowski,
E García,
T Gburek,
N George,
K Gulbrandsen,
C Halliwell,
J Hamblen,
M Hauer,
C Henderson,
D J Hofman,
R S Hollis,
R Hołyński,
B Holzman,
A Iordanova,
E Johnson,
J L Kane,
N Khan,
P Kulinich,
C M Kuo,
W Li,
W T Lin,
C Loizides,
S Manly,
A C Mignerey,
R Nouicer,
A Olszewski,
R Pak,
C Reed,
C Roland,
G Roland,
J Sagerer,
H Seals,
I Sedykh,
C E Smith,
M A Stankiewicz,
P Steinberg,
G S F Stephans,
A Sukhanov,
M B Tonjes,
A Trzupek,
C Vale,
G J van Nieuwenhuizen,
S S Vaurynovich,
R Verdier,
G I Veres,
P Walters,
E Wenger,
F L H Wolfs,
B Wosiek,
K Woźniak,
B Wysłouch
Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
This Letter presents the first measurement of event-by-event fluctuations of the elliptic flow parameter v_{2} in Au+Au collisions at sqrt[s_{NN}]=200 GeV as a function of collision centrality. The relative nonstatistical fluctuations of the v_{2} parameter are found to be approximately 40%. The results, including contributions from event-by-event elliptic flow fluctuations and from azimuthal correlations that are unrelated to the reaction plane (nonflow correlations), establish an upper limit on the magnitude of underlying elliptic flow fluctuations. This limit is consistent with predictions based on spatial fluctuations of the participating nucleons in the initial nuclear overlap region. These results provide important constraints on models of the initial state and hydrodynamic evolution of relativistic heavy ion collisions.
A Adare,
S Afanasiev,
C Aidala,
N N Ajitanand,
Y Akiba,
H Al-Bataineh,
J Alexander,
A Al-Jamel,
K Aoki,
L Aphecetche,
R Armendariz,
S H Aronson,
J Asai,
E T Atomssa,
R Averbeck,
T C Awes,
B Azmoun,
V Babintsev,
G Baksay,
L Baksay,
A Baldisseri,
K N Barish,
P D Barnes,
B Bassalleck,
S Bathe,
S Batsouli,
V Baublis,
F Bauer,
A Bazilevsky,
S Belikov,
R Bennett,
Y Berdnikov,
A A Bickley,
M T Bjorndal,
J G Boissevain,
H Borel,
K Boyle,
M L Brooks,
D S Brown,
D Bucher,
H Buesching,
V Bumazhnov,
G Bunce,
J M Burward-Hoy,
S Butsyk,
S Campbell,
J-S Chai,
B S Chang,
J-L Charvet,
S Chernichenko,
J Chiba,
C Y Chi,
M Chiu,
I J Choi,
T Chujo,
P Chung,
A Churyn,
V Cianciolo,
C R Cleven,
Y Cobigo,
B A Cole,
M P Comets,
P Constantin,
M Csanád,
T Csörgo,
T Dahms,
K Das,
G David,
M B Deaton,
K Dehmelt,
H Delagrange,
A Denisov,
D d'Enterria,
A Deshpande,
E J Desmond,
O Dietzsch,
A Dion,
M Donadelli,
J L Drachenberg,
O Drapier,
A Drees,
A K Dubey,
A Durum,
V Dzhordzhadze,
Y V Efremenko,
J Egdemir,
F Ellinghaus,
W S Emam,
A Enokizono,
H En'yo,
B Espagnon,
S Esumi,
K O Eyser,
D E Fields,
M Finger,
M Finger Jr,
F Fleuret,
S L Fokin,
B Forestier,
Z Fraenkel,
J E Frantz,
A Franz,
A D Frawley,
K Fujiwara,
Y Fukao,
S-Y Fung,
T Fusayasu,
S Gadrat,
I Garishvili,
F Gastineau,
M Germain,
A Glenn,
H Gong,
M Gonin,
J Gosset,
Y Goto,
R Granier de Cassagnac,
N Grau,
S V Greene,
M Grosse Perdekamp,
T Gunji,
H-A Gustafsson,
T Hachiya,
A Hadj Henni,
C Haegemann,
J S Haggerty,
M N Hagiwara,
H Hamagaki,
R Han,
H Harada,
E P Hartouni,
K Haruna,
M Harvey,
E Haslum,
K Hasuko,
R Hayano,
M Heffner,
T K Hemmick,
T Hester,
J M Heuser,
X He,
H Hiejima,
J C Hill,
R Hobbs,
M Hohlmann,
M Holmes,
W Holzmann,
K Homma,
B Hong,
T Horaguchi,
D Hornback,
M G Hur,
T Ichihara,
K Imai,
M Inaba,
Y Inoue,
D Isenhower,
L Isenhower,
M Ishihara,
T Isobe,
M Issah,
A Isupov,
B V Jacak,
J Jia,
J Jin,
O Jinnouchi,
B M Johnson,
K S Joo,
D Jouan,
F Kajihara,
S Kametani,
N Kamihara,
J Kamin,
M Kaneta,
J H Kang,
H Kanou,
T Kawagishi,
D Kawall,
A V Kazantsev,
S Kelly,
A Khanzadeev,
J Kikuchi,
D H Kim,
D J Kim,
E Kim,
Y-S Kim,
E Kinney,
A Kiss,
E Kistenev,
A Kiyomichi,
J Klay,
C Klein-Boesing,
L Kochenda,
V Kochetkov,
B Komkov,
M Konno,
D Kotchetkov,
A Kozlov,
A Král,
A Kravitz,
P J Kroon,
J Kubart,
G J Kunde,
N Kurihara,
K Kurita,
M J Kweon,
Y Kwon,
G S Kyle,
R Lacey,
Y-S Lai,
J G Lajoie,
A Lebedev,
Y Le Bornec,
S Leckey,
D M Lee,
M K Lee,
T Lee,
M J Leitch,
M A L Leite,
B Lenzi,
H Lim,
T Liska,
A Litvinenko,
M X Liu,
X Li,
X H Li,
B Love,
D Lynch,
C F Maguire,
Y I Makdisi,
A Malakhov,
M D Malik,
V I Manko,
Y Mao,
L Masek,
H Masui,
F Matathias,
M C McCain,
M McCumber,
P L McGaughey,
Y Miake,
P Mikes,
K Miki,
T E Miller,
A Milov,
S Mioduszewski,
G C Mishra,
M Mishra,
J T Mitchell,
M Mitrovski,
A Morreale,
D P Morrison,
J M Moss,
T V Moukhanova,
D Mukhopadhyay,
J Murata,
S Nagamiya,
Y Nagata,
J L Nagle,
M Naglis,
I Nakagawa,
Y Nakamiya,
T Nakamura,
K Nakano,
J Newby,
M Nguyen,
B E Norman,
A S Nyanin,
J Nystrand,
E O'Brien,
S X Oda,
C A Ogilvie,
H Ohnishi,
I D Ojha,
H Okada,
K Okada,
M Oka,
O O Omiwade,
A Oskarsson,
I Otterlund,
M Ouchida,
K Ozawa,
R Pak,
D Pal,
A P T Palounek,
V Pantuev,
V Papavassiliou,
J Park,
W J Park,
S F Pate,
H Pei,
J-C Peng,
H Pereira,
V Peresedov,
D Yu Peressounko,
C Pinkenburg,
R P Pisani,
M L Purschke,
A K Purwar,
H Qu,
J Rak,
A Rakotozafindrabe,
I Ravinovich,
K F Read,
S Rembeczki,
M Reuter,
K Reygers,
V Riabov,
Y Riabov,
G Roche,
A Romana,
M Rosati,
S S E Rosendahl,
P Rosnet,
P Rukoyatkin,
V L Rykov,
S S Ryu,
B Sahlmueller,
N Saito,
T Sakaguchi,
S Sakai,
H Sakata,
V Samsonov,
H D Sato,
S Sato,
S Sawada,
J Seele,
R Seidl,
V Semenov,
R Seto,
D Sharma,
T K Shea,
I Shein,
A Shevel,
T-A Shibata,
K Shigaki,
M Shimomura,
T Shohjoh,
K Shoji,
A Sickles,
C L Silva,
D Silvermyr,
C Silvestre,
K S Sim,
C P Singh,
V Singh,
S Skutnik,
M Slunecka,
W C Smith,
A Soldatov,
R A Soltz,
W E Sondheim,
S P Sorensen,
I V Sourikova,
F Staley,
P W Stankus,
E Stenlund,
M Stepanov,
A Ster,
S P Stoll,
T Sugitate,
C Suire,
J P Sullivan,
J Sziklai,
T Tabaru,
S Takagi,
E M Takagui,
A Taketani,
K H Tanaka,
Y Tanaka,
K Tanida,
M J Tannenbaum,
A Taranenko,
P Tarján,
T L Thomas,
M Togawa,
A Toia,
J Tojo,
L Tomásek,
H Torii,
R S Towell,
V-N Tram,
I Tserruya,
Y Tsuchimoto,
S K Tuli,
H Tydesjö,
N Tyurin,
C Vale,
H Valle,
H W van Hecke,
J Velkovska,
R Vertesi,
A A Vinogradov,
M Virius,
V Vrba,
E Vznuzdaev,
M Wagner,
D Walker,
X R Wang,
Y Watanabe,
J Wessels,
S N White,
N Willis,
D Winter,
C L Woody,
M Wysocki,
W Xie,
Y L Yamaguchi,
A Yanovich,
Z Yasin,
J Ying,
S Yokkaichi,
G R Young,
I Younus,
I E Yushmanov,
W A Zajc,
O Zaudtke,
C Zhang,
S Zhou,
J Zimányi,
L Zolin
University of Colorado, Boulder, Colorado 80309, USA.
The production of e;{+}e;{-} pairs for m_{e;{+}e;{-}}<0.3 GeV/c;{2} and 1<p_{T}<5 GeV/c is measured in p+p and Au+Au collisions at sqrt[s_{NN}]=200 GeV. An enhanced yield above hadronic sources is observed. Treating the excess as photon internal conversions, the invariant yield of direct photons is deduced. In central Au+Au collisions, the excess of the direct photon yield over p+p is exponential in transverse momentum, with an inverse slope T=221+/-19;{stat}+/-19;{syst} MeV. Hydrodynamical models with initial temperatures ranging from T_{init} approximately 300-600 MeV at times of approximately 0.6-0.15 fm/c after the collision are in qualitative agreement with the data. Lattice QCD predicts a phase transition to quark gluon plasma at approximately 170 MeV.
B Alver,
B B Back,
M D Baker,
M Ballintijn,
D S Barton,
R R Betts,
A A Bickley,
R Bindel,
W Busza,
A Carroll,
Z Chai,
V Chetluru,
M P Decowski,
E García,
T Gburek,
N George,
K Gulbrandsen,
C Halliwell,
J Hamblen,
M Hauer,
C Henderson,
D J Hofman,
R S Hollis,
R Hołyński,
B Holzman,
A Iordanova,
E Johnson,
J L Kane,
N Khan,
P Kulinich,
C M Kuo,
W Li,
W T Lin,
C Loizides,
S Manly,
A C Mignerey,
R Nouicer,
A Olszewski,
R Pak,
C Reed,
C Roland,
G Roland,
J Sagerer,
H Seals,
I Sedykh,
C E Smith,
M A Stankiewicz,
P Steinberg,
G S F Stephans,
A Sukhanov,
M B Tonjes,
A Trzupek,
C Vale,
G J van Nieuwenhuizen,
S S Vaurynovich,
R Verdier,
G I Veres,
P Walters,
E Wenger,
F L H Wolfs,
B Wosiek,
K Woźniak,
B Wysłouch
Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
A measurement of two-particle correlations with a high transverse momentum trigger particle (p_{T};{trig}>2.5 GeV/c) is presented for Au+Au collisions at sqrt[s_{NN}]=200 GeV over the uniquely broad longitudinal acceptance of the PHOBOS detector (-4<Deltaeta<2). A broadening of the away-side azimuthal correlation compared to elementary collisions is observed at all Deltaeta. As in p+p collisions, the near side is characterized by a peak of correlated partners at small angle relative to the trigger particle. However, in central Au+Au collisions an additional correlation extended in Deltaeta and known as the "ridge" is found to reach at least |Deltaeta| approximately 4. The ridge yield is largely independent of Deltaeta over the measured range, and it decreases towards more peripheral collisions. For the chosen p_{T};{trig} cut, the ridge yield is consistent with zero for events with less than roughly 100 participating nucleons.
A Adare,
S Afanasiev,
C Aidala,
N N Ajitanand,
Y Akiba,
H Al-Bataineh,
J Alexander,
K Aoki,
L Aphecetche,
R Armendariz,
S H Aronson,
J Asai,
E T Atomssa,
R Averbeck,
T C Awes,
B Azmoun,
V Babintsev,
M Bai,
G Baksay,
L Baksay,
A Baldisseri,
K N Barish,
P D Barnes,
B Bassalleck,
A T Basye,
S Bathe,
S Batsouli,
V Baublis,
C Baumann,
A Bazilevsky,
S Belikov,
R Bennett,
A Berdnikov,
Y Berdnikov,
A A Bickley,
J G Boissevain,
H Borel,
K Boyle,
M L Brooks,
H Buesching,
V Bumazhnov,
G Bunce,
S Butsyk,
C M Camacho,
S Campbell,
B S Chang,
W C Chang,
J-L Charvet,
S Chernichenko,
J Chiba,
C Y Chi,
M Chiu,
I J Choi,
R K Choudhury,
T Chujo,
P Chung,
A Churyn,
V Cianciolo,
Z Citron,
C R Cleven,
B A Cole,
M P Comets,
P Constantin,
M Csanád,
T Csörgo,
T Dahms,
S Dairaku,
K Das,
G David,
M B Deaton,
K Dehmelt,
H Delagrange,
A Denisov,
D d'Enterria,
A Deshpande,
E J Desmond,
O Dietzsch,
A Dion,
M Donadelli,
O Drapier,
A Drees,
K A Drees,
A K Dubey,
A Durum,
D Dutta,
V Dzhordzhadze,
Y V Efremenko,
J Egdemir,
F Ellinghaus,
W S Emam,
T Engelmore,
A Enokizono,
H En'yo,
S Esumi,
K O Eyser,
B Fadem,
D E Fields,
M Finger Jr,
M Finger,
F Fleuret,
S L Fokin,
Z Fraenkel,
J E Frantz,
A Franz,
A D Frawley,
K Fujiwara,
Y Fukao,
T Fusayasu,
S Gadrat,
I Garishvili,
A Glenn,
H Gong,
M Gonin,
J Gosset,
Y Goto,
R Granier de Cassagnac,
N Grau,
S V Greene,
M Grosse Perdekamp,
T Gunji,
H-A Gustafsson,
T Hachiya,
A Hadj Henni,
C Haegemann,
J S Haggerty,
H Hamagaki,
R Han,
H Harada,
E P Hartouni,
K Haruna,
E Haslum,
R Hayano,
M Heffner,
T K Hemmick,
T Hester,
X He,
H Hiejima,
J C Hill,
R Hobbs,
M Hohlmann,
W Holzmann,
K Homma,
B Hong,
T Horaguchi,
D Hornback,
S Huang,
T Ichihara,
R Ichimiya,
Y Ikeda,
K Imai,
J Imrek,
M Inaba,
Y Inoue,
D Isenhower,
L Isenhower,
M Ishihara,
T Isobe,
M Issah,
A Isupov,
D Ivanischev,
B V Jacak,
J Jia,
J Jin,
O Jinnouchi,
B M Johnson,
K S Joo,
D Jouan,
F Kajihara,
S Kametani,
N Kamihara,
J Kamin,
M Kaneta,
J H Kang,
H Kanou,
J Kapustinsky,
D Kawall,
A V Kazantsev,
T Kempel,
A Khanzadeev,
K M Kijima,
J Kikuchi,
B I Kim,
D H Kim,
D J Kim,
E Kim,
S H Kim,
E Kinney,
K Kiriluk,
A Kiss,
E Kistenev,
A Kiyomichi,
J Klay,
C Klein-Boesing,
L Kochenda,
V Kochetkov,
B Komkov,
M Konno,
J Koster,
D Kotchetkov,
A Kozlov,
A Král,
A Kravitz,
J Kubart,
G J Kunde,
N Kurihara,
K Kurita,
M Kurosawa,
M J Kweon,
Y Kwon,
G S Kyle,
R Lacey,
Y-S Lai,
Y S Lai,
J G Lajoie,
D Layton,
A Lebedev,
D M Lee,
K B Lee,
M K Lee,
T Lee,
M J Leitch,
M A L Leite,
B Lenzi,
P Liebing,
T Liska,
A Litvinenko,
H Liu,
M X Liu,
X Li,
B Love,
D Lynch,
C F Maguire,
Y I Makdisi,
A Malakhov,
M D Malik,
V I Manko,
E Mannel,
Y Mao,
L Masek,
H Masui,
F Matathias,
M McCumber,
P L McGaughey,
N Means,
B Meredith,
Y Miake,
P Mikes,
K Miki,
T E Miller,
A Milov,
S Mioduszewski,
M Mishra,
J T Mitchell,
M Mitrovski,
A K Mohanty,
Y Morino,
A Morreale,
D P Morrison,
T V Moukhanova,
D Mukhopadhyay,
J Murata,
S Nagamiya,
Y Nagata,
J L Nagle,
M Naglis,
M I Nagy,
I Nakagawa,
Y Nakamiya,
T Nakamura,
K Nakano,
J Newby,
M Nguyen,
T Niita,
B E Norman,
R Nouicer,
A S Nyanin,
E O'Brien,
S X Oda,
C A Ogilvie,
H Ohnishi,
H Okada,
K Okada,
M Oka,
O O Omiwade,
Y Onuki,
A Oskarsson,
M Ouchida,
K Ozawa,
R Pak,
D Pal,
A P T Palounek,
V Pantuev,
V Papavassiliou,
J Park,
W J Park,
S F Pate,
H Pei,
J-C Peng,
H Pereira,
V Peresedov,
D Yu Peressounko,
C Pinkenburg,
M L Purschke,
A K Purwar,
H Qu,
J Rak,
A Rakotozafindrabe,
I Ravinovich,
K F Read,
S Rembeczki,
M Reuter,
K Reygers,
V Riabov,
Y Riabov,
D Roach,
G Roche,
S D Rolnick,
A Romana,
M Rosati,
S S E Rosendahl,
P Rosnet,
P Rukoyatkin,
P Ruzicka,
V L Rykov,
B Sahlmueller,
N Saito,
T Sakaguchi,
S Sakai,
K Sakashita,
H Sakata,
V Samsonov,
S Sato,
T Sato,
S Sawada,
K Sedgwick,
J Seele,
R Seidl,
A Yu Semenov,
V Semenov,
R Seto,
D Sharma,
I Shein,
A Shevel,
T-A Shibata,
K Shigaki,
M Shimomura,
K Shoji,
P Shukla,
A Sickles,
C L Silva,
D Silvermyr,
C Silvestre,
K S Sim,
B K Singh,
C P Singh,
V Singh,
S Skutnik,
M Slunecka,
A Soldatov,
R A Soltz,
W E Sondheim,
S P Sorensen,
I V Sourikova,
F Staley,
P W Stankus,
E Stenlund,
M Stepanov,
A Ster,
S P Stoll,
T Sugitate,
C Suire,
A Sukhanov,
J Sziklai,
T Tabaru,
S Takagi,
E M Takagui,
A Taketani,
R Tanabe,
Y Tanaka,
K Tanida,
M J Tannenbaum,
A Taranenko,
P Tarján,
H Themann,
T L Thomas,
M Togawa,
A Toia,
J Tojo,
L Tomásek,
Y Tomita,
H Torii,
R S Towell,
V-N Tram,
I Tserruya,
Y Tsuchimoto,
C Vale,
H Valle,
H W van Hecke,
A Veicht,
J Velkovska,
R Vertesi,
A A Vinogradov,
M Virius,
V Vrba,
E Vznuzdaev,
M Wagner,
D Walker,
X R Wang,
Y Watanabe,
F Wei,
J Wessels,
S N White,
D Winter,
C L Woody,
M Wysocki,
W Xie,
Y L Yamaguchi,
K Yamaura,
R Yang,
A Yanovich,
Z Yasin,
J Ying,
S Yokkaichi,
G R Young,
I Younus,
I E Yushmanov,
W A Zajc,
O Zaudtke,
C Zhang,
S Zhou,
J Zimányi,
L Zolin
University of Colorado, Boulder, Colorado 80309, USA.
The momentum distribution of electrons from semileptonic decays of charm and bottom quarks for midrapidity |y|<0.35 in p+p collisions at square root of s=200 GeV is measured by the PHENIX experiment at the Relativistic Heavy Ion Collider over the transverse momentum range 2<pT<7 GeV/c. The ratio of the yield of electrons from bottom to that from charm is presented. The ratio is determined using partial D/D-->e(+/-)K(-/+)X (K unidentified) reconstruction. It is found that the yield of electrons from bottom becomes significant above 4 GeV/c in pT. A fixed-order-plus-next-to-leading-log perturbative quantum chromodynamics calculation agrees with the data within the theoretical and experimental uncertainties. The extracted total bottom production cross section at this energy is sigma(bb)=3.2(-1.1)(+1.2)(stat)(-1.3)(+1.4)(syst)mub.
A Adare,
S Afanasiev,
C Aidala,
N N Ajitanand,
Y Akiba,
H Al-Bataineh,
J Alexander,
K Aoki,
L Aphecetche,
J Asai,
E T Atomssa,
R Averbeck,
T C Awes,
B Azmoun,
V Babintsev,
M Bai,
G Baksay,
L Baksay,
A Baldisseri,
K N Barish,
P D Barnes,
B Bassalleck,
A T Basye,
S Bathe,
S Batsouli,
V Baublis,
C Baumann,
A Bazilevsky,
S Belikov,
R Bennett,
A Berdnikov,
Y Berdnikov,
A A Bickley,
J G Boissevain,
H Borel,
K Boyle,
M L Brooks,
H Buesching,
V Bumazhnov,
G Bunce,
S Butsyk,
C M Camacho,
S Campbell,
P Chand,
B S Chang,
W C Chang,
J-L Charvet,
S Chernichenko,
C Y Chi,
M Chiu,
I J Choi,
R K Choudhury,
T Chujo,
P Chung,
A Churyn,
V Cianciolo,
Z Citron,
B A Cole,
P Constantin,
M Csanád,
T Csörgo,
T Dahms,
S Dairaku,
K Das,
G David,
A Denisov,
D d'Enterria,
A Deshpande,
E J Desmond,
O Dietzsch,
A Dion,
M Donadelli,
O Drapier,
A Drees,
K A Drees,
A K Dubey,
A Durum,
D Dutta,
V Dzhordzhadze,
Y V Efremenko,
J Egdemir,
F Ellinghaus,
T Engelmore,
A Enokizono,
H En'yo,
S Esumi,
K O Eyser,
B Fadem,
D E Fields,
M Finger,
M Finger Jr,
F Fleuret,
S L Fokin,
Z Fraenkel,
J E Frantz,
A Franz,
A D Frawley,
K Fujiwara,
Y Fukao,
T Fusayasu,
I Garishvili,
A Glenn,
H Gong,
M Gonin,
J Gosset,
Y Goto,
R Granier de Cassagnac,
N Grau,
S V Greene,
M Grosse Perdekamp,
T Gunji,
H-A Gustafsson,
A Hadj Henni,
J S Haggerty,
H Hamagaki,
R Han,
E P Hartouni,
K Haruna,
E Haslum,
R Hayano,
M Heffner,
T K Hemmick,
T Hester,
X He,
J C Hill,
M Hohlmann,
W Holzmann,
K Homma,
B Hong,
T Horaguchi,
D Hornback,
S Huang,
T Ichihara,
R Ichimiya,
Y Ikeda,
K Imai,
J Imrek,
M Inaba,
D Isenhower,
M Ishihara,
T Isobe,
M Issah,
A Isupov,
D Ivanischev,
B V Jacak,
J Jia,
J Jin,
B M Johnson,
K S Joo,
D Jouan,
F Kajihara,
S Kametani,
N Kamihara,
J Kamin,
J H Kang,
J Kapustinsky,
D Kawall,
A V Kazantsev,
T Kempel,
A Khanzadeev,
K M Kijima,
J Kikuchi,
B I Kim,
D H Kim,
D J Kim,
E Kim,
S H Kim,
E Kinney,
K Kiriluk,
A Kiss,
E Kistenev,
J Klay,
C Klein-Boesing,
L Kochenda,
V Kochetkov,
B Komkov,
M Konno,
J Koster,
A Kozlov,
A Král,
A Kravitz,
G J Kunde,
K Kurita,
M Kurosawa,
M J Kweon,
Y Kwon,
G S Kyle,
R Lacey,
Y S Lai,
J G Lajoie,
D Layton,
A Lebedev,
D M Lee,
K B Lee,
T Lee,
M J Leitch,
M A L Leite,
B Lenzi,
P Liebing,
T Liska,
A Litvinenko,
H Liu,
M X Liu,
X Li,
B Love,
D Lynch,
C F Maguire,
Y I Makdisi,
A Malakhov,
M D Malik,
V I Manko,
E Mannel,
Y Mao,
L Masek,
H Masui,
F Matathias,
M McCumber,
P L McGaughey,
N Means,
B Meredith,
Y Miake,
P Mikes,
K Miki,
A Milov,
M Mishra,
J T Mitchell,
A K Mohanty,
Y Morino,
A Morreale,
D P Morrison,
T V Moukhanova,
D Mukhopadhyay,
J Murata,
S Nagamiya,
J L Nagle,
M Naglis,
M I Nagy,
I Nakagawa,
Y Nakamiya,
T Nakamura,
K Nakano,
J Newby,
M Nguyen,
T Niita,
R Nouicer,
A S Nyanin,
E O'Brien,
S X Oda,
C A Ogilvie,
H Okada,
K Okada,
M Oka,
Y Onuki,
A Oskarsson,
M Ouchida,
K Ozawa,
R Pak,
A P T Palounek,
V Pantuev,
V Papavassiliou,
J Park,
W J Park,
S F Pate,
H Pei,
J-C Peng,
H Pereira,
V Peresedov,
D Yu Peressounko,
C Pinkenburg,
M L Purschke,
A K Purwar,
H Qu,
J Rak,
A Rakotozafindrabe,
I Ravinovich,
K F Read,
S Rembeczki,
M Reuter,
K Reygers,
V Riabov,
Y Riabov,
D Roach,
G Roche,
S D Rolnick,
M Rosati,
S S E Rosendahl,
P Rosnet,
P Rukoyatkin,
P Ruzicka,
V L Rykov,
B Sahlmueller,
N Saito,
T Sakaguchi,
S Sakai,
K Sakashita,
V Samsonov,
T Sato,
S Sawada,
K Sedgwick,
J Seele,
R Seidl,
A Yu Semenov,
V Semenov,
R Seto,
D Sharma,
I Shein,
T-A Shibata,
K Shigaki,
M Shimomura,
K Shoji,
P Shukla,
A Sickles,
C L Silva,
D Silvermyr,
C Silvestre,
K S Sim,
B K Singh,
C P Singh,
V Singh,
M Slunecka,
A Soldatov,
R A Soltz,
W E Sondheim,
S P Sorensen,
I V Sourikova,
F Staley,
P W Stankus,
E Stenlund,
M Stepanov,
A Ster,
S P Stoll,
T Sugitate,
C Suire,
A Sukhanov,
J Sziklai,
E M Takagui,
A Taketani,
R Tanabe,
Y Tanaka,
S Taneja,
K Tanida,
M J Tannenbaum,
A Taranenko,
P Tarján,
H Themann,
T L Thomas,
M Togawa,
A Toia,
L Tomásek,
Y Tomita,
H Torii,
R S Towell,
V-N Tram,
I Tserruya,
Y Tsuchimoto,
C Vale,
H Valle,
H W van Hecke,
A Veicht,
J Velkovska,
R Vertesi,
A A Vinogradov,
M Virius,
V Vrba,
E Vznuzdaev,
D Walker,
X R Wang,
Y Watanabe,
F Wei,
J Wessels,
S N White,
S Williamson,
D Winter,
C L Woody,
M Wysocki,
W Xie,
Y L Yamaguchi,
K Yamaura,
R Yang,
A Yanovich,
J Ying,
S Yokkaichi,
G R Young,
I Younus,
I E Yushmanov,
W A Zajc,
O Zaudtke,
C Zhang,
S Zhou,
L Zolin
University of Colorado, Boulder, Colorado 80309, USA.
The double helicity asymmetry in neutral pion production for p_{T}=1 to 12 GeV/c was measured with the PHENIX experiment to access the gluon-spin contribution, DeltaG, to the proton spin. Measured asymmetries are consistent with zero, and at a theory scale of mu;{2}=4 GeV2 a next to leading order QCD analysis gives DeltaG;{[0.02,0.3]}=0.2, with a constraint of -0.7<DeltaG;{[0.02,0.3]}<0.5 at Deltachi;{2}=9 ( approximately 3sigma) for the sampled gluon momentum fraction (x) range, 0.02 to 0.3. The results are obtained using predictions for the measured asymmetries generated from four representative fits to polarized deep inelastic scattering data. We also consider the dependence of the DeltaG constraint on the choice of the theoretical scale, a dominant uncertainty in these predictions.
A Adare,
S Afanasiev,
C Aidala,
N N Ajitanand,
Y Akiba,
H Al-Bataineh,
J Alexander,
A Al-Jamel,
K Aoki,
L Aphecetche,
R Armendariz,
S H Aronson,
J Asai,
E T Atomssa,
R Averbeck,
T C Awes,
B Azmoun,
V Babintsev,
G Baksay,
L Baksay,
A Baldisseri,
K N Barish,
P D Barnes,
B Bassalleck,
S Bathe,
S Batsouli,
V Baublis,
F Bauer,
A Bazilevsky,
S Belikov,
R Bennett,
Y Berdnikov,
A A Bickley,
M T Bjorndal,
J G Boissevain,
H Borel,
K Boyle,
M L Brooks,
D S Brown,
D Bucher,
H Buesching,
V Bumazhnov,
G Bunce,
J M Burward-Hoy,
S Butsyk,
S Campbell,
J-S Chai,
B S Chang,
J-L Charvet,
S Chernichenko,
J Chiba,
C Y Chi,
M Chiu,
I J Choi,
T Chujo,
P Chung,
A Churyn,
V Cianciolo,
C R Cleven,
Y Cobigo,
B A Cole,
M P Comets,
P Constantin,
M Csanád,
T Csörgo,
T Dahms,
K Das,
G David,
M B Deaton,
K Dehmelt,
H Delagrange,
A Denisov,
D d'Enterria,
A Deshpande,
E J Desmond,
O Dietzsch,
A Dion,
M Donadelli,
J L Drachenberg,
O Drapier,
A Drees,
A K Dubey,
A Durum,
V Dzhordzhadze,
Y V Efremenko,
J Egdemir,
F Ellinghaus,
W S Emam,
A Enokizono,
H En'yo,
B Espagnon,
S Esumi,
K O Eyser,
D E Fields,
M Finger,
M Finger Jr,
F Fleuret,
S L Fokin,
B Forestier,
Z Fraenkel,
J E Frantz,
A Franz,
A D Frawley,
K Fujiwara,
Y Fukao,
S-Y Fung,
T Fusayasu,
S Gadrat,
I Garishvili,
F Gastineau,
M Germain,
A Glenn,
H Gong,
M Gonin,
J Gosset,
Y Goto,
R Granier de Cassagnac,
N Grau,
S V Greene,
M Grosse Perdekamp,
T Gunji,
H-A Gustafsson,
T Hachiya,
A Hadj Henni,
C Haegemann,
J S Haggerty,
M N Hagiwara,
H Hamagaki,
R Han,
H Harada,
E P Hartouni,
K Haruna,
M Harvey,
E Haslum,
K Hasuko,
R Hayano,
M Heffner,
T K Hemmick,
T Hester,
J M Heuser,
X He,
H Hiejima,
J C Hill,
R Hobbs,
M Hohlmann,
M Holmes,
W Holzmann,
K Homma,
B Hong,
T Horaguchi,
D Hornback,
M G Hur,
T Ichihara,
K Imai,
J Imrek,
M Inaba,
Y Inoue,
D Isenhower,
L Isenhower,
M Ishihara,
T Isobe,
M Issah,
A Isupov,
B V Jacak,
J Jia,
J Jin,
O Jinnouchi,
B M Johnson,
K S Joo,
D Jouan,
F Kajihara,
S Kametani,
N Kamihara,
J Kamin,
M Kaneta,
J H Kang,
H Kanou,
T Kawagishi,
D Kawall,
A V Kazantsev,
S Kelly,
A Khanzadeev,
J Kikuchi,
D H Kim,
D J Kim,
E Kim,
Y-S Kim,
E Kinney,
A Kiss,
E Kistenev,
A Kiyomichi,
J Klay,
C Klein-Boesing,
L Kochenda,
V Kochetkov,
B Komkov,
M Konno,
D Kotchetkov,
A Kozlov,
A Král,
A Kravitz,
P J Kroon,
J Kubart,
G J Kunde,
N Kurihara,
K Kurita,
M J Kweon,
Y Kwon,
G S Kyle,
R Lacey,
Y-S Lai,
J G Lajoie,
A Lebedev,
Y Le Bornec,
S Leckey,
D M Lee,
M K Lee,
T Lee,
M J Leitch,
M A L Leite,
B Lenzi,
H Lim,
T Liska,
A Litvinenko,
M X Liu,
X Li,
X H Li,
B Love,
D Lynch,
C F Maguire,
Y I Makdisi,
A Malakhov,
M D Malik,
V I Manko,
Y Mao,
L Masek,
H Masui,
F Matathias,
M C McCain,
M McCumber,
P L McGaughey,
Y Miake,
P Mikes,
K Miki,
T E Miller,
A Milov,
S Mioduszewski,
G C Mishra,
M Mishra,
J T Mitchell,
M Mitrovski,
A Morreale,
D P Morrison,
J M Moss,
T V Moukhanova,
D Mukhopadhyay,
J Murata,
S Nagamiya,
Y Nagata,
J L Nagle,
M Naglis,
I Nakagawa,
Y Nakamiya,
T Nakamura,
K Nakano,
J Newby,
M Nguyen,
B E Norman,
A S Nyanin,
J Nystrand,
E O'Brien,
S X Oda,
C A Ogilvie,
H Ohnishi,
I D Ojha,
H Okada,
K Okada,
M Oka,
O O Omiwade,
A Oskarsson,
I Otterlund,
M Ouchida,
K Ozawa,
R Pak,
D Pal,
A P T Palounek,
V Pantuev,
V Papavassiliou,
J Park,
W J Park,
S F Pate,
H Pei,
J-C Peng,
H Pereira,
V Peresedov,
D Yu Peressounko,
C Pinkenburg,
R P Pisani,
M L Purschke,
A K Purwar,
H Qu,
J Rak,
A Rakotozafindrabe,
I Ravinovich,
K F Read,
S Rembeczki,
M Reuter,
K Reygers,
V Riabov,
Y Riabov,
G Roche,
A Romana,
M Rosati,
S S E Rosendahl,
P Rosnet,
P Rukoyatkin,
V L Rykov,
S S Ryu,
B Sahlmueller,
N Saito,
T Sakaguchi,
S Sakai,
H Sakata,
V Samsonov,
H D Sato,
S Sato,
S Sawada,
J Seele,
R Seidl,
V Semenov,
R Seto,
D Sharma,
T K Shea,
I Shein,
A Shevel,
T-A Shibata,
K Shigaki,
M Shimomura,
T Shohjoh,
K Shoji,
A Sickles,
C L Silva,
D Silvermyr,
C Silvestre,
K S Sim,
C P Singh,
V Singh,
S Skutnik,
M Slunecka,
W C Smith,
A Soldatov,
R A Soltz,
W E Sondheim,
S P Sorensen,
I V Sourikova,
F Staley,
P W Stankus,
E Stenlund,
M Stepanov,
A Ster,
S P Stoll,
T Sugitate,
C Suire,
J P Sullivan,
J Sziklai,
T Tabaru,
S Takagi,
E M Takagui,
A Taketani,
K H Tanaka,
Y Tanaka,
K Tanida,
M J Tannenbaum,
A Taranenko,
P Tarján,
T L Thomas,
M Togawa,
A Toia,
J Tojo,
L Tomásek,
H Torii,
R S Towell,
V-N Tram,
I Tserruya,
Y Tsuchimoto,
S K Tuli,
H Tydesjö,
N Tyurin,
C Vale,
H Valle,
H W van Hecke,
J Velkovska,
R Vertesi,
A A Vinogradov,
M Virius,
V Vrba,
E Vznuzdaev,
M Wagner,
D Walker,
X R Wang,
Y Watanabe,
J Wessels,
S N White,
N Willis,
D Winter,
C L Woody,
M Wysocki,
W Xie,
Y L Yamaguchi,
A Yanovich,
Z Yasin,
J Ying,
S Yokkaichi,
G R Young,
I Younus,
I E Yushmanov,
W A Zajc,
O Zaudtke,
C Zhang,
S Zhou,
J Zimányi,
L Zolin
University of Colorado, Boulder, Colorado 80309, USA.
For Au+Au collisions at 200 GeV, we measure neutral pion production with good statistics for transverse momentum, p_{T}, up to 20 GeV/c. A fivefold suppression is found, which is essentially constant for 5<p_{T}<20 GeV/c. Experimental uncertainties are small enough to constrain any model-dependent parametrization for the transport coefficient of the medium, e.g., q[over ;] in the parton quenching model. The spectral shape is similar for all collision classes, and the suppression does not saturate in Au+Au collisions.
A Adare,
S Afanasiev,
C Aidala,
N N Ajitanand,
Y Akiba,
H Al-Bataineh,
J Alexander,
K Aoki,
L Aphecetche,
R Armendariz,
S H Aronson,
J Asai,
E T Atomssa,
R Averbeck,
T C Awes,
B Azmoun,
V Babintsev,
M Bai,
G Baksay,
L Baksay,
A Baldisseri,
K N Barish,
P D Barnes,
B Bassalleck,
A T Basye,
S Bathe,
S Batsouli,
V Baublis,
C Baumann,
A Bazilevsky,
S Belikov,
R Bennett,
A Berdnikov,
Y Berdnikov,
A A Bickley,
J G Boissevain,
H Borel,
K Boyle,
M L Brooks,
H Buesching,
V Bumazhnov,
G Bunce,
S Butsyk,
C M Camacho,
S Campbell,
B S Chang,
W C Chang,
J-L Charvet,
S Chernichenko,
J Chiba,
C Y Chi,
M Chiu,
I J Choi,
R K Choudhury,
T Chujo,
P Chung,
A Churyn,
V Cianciolo,
Z Citron,
C R Cleven,
B A Cole,
M P Comets,
P Constantin,
M Csanád,
T Csörgo,
T Dahms,
S Dairaku,
K Das,
G David,
M B Deaton,
K Dehmelt,
H Delagrange,
A Denisov,
D d'Enterria,
A Deshpande,
E J Desmond,
O Dietzsch,
A Dion,
M Donadelli,
O Drapier,
A Drees,
K A Drees,
A K Dubey,
A Durum,
D Dutta,
V Dzhordzhadze,
Y V Efremenko,
J Egdemir,
F Ellinghaus,
W S Emam,
T Engelmore,
A Enokizono,
H En'yo,
S Esumi,
K O Eyser,
B Fadem,
D E Fields,
M Finger Jr,
M Finger,
F Fleuret,
S L Fokin,
Z Fraenkel,
J E Frantz,
A Franz,
A D Frawley,
K Fujiwara,
Y Fukao,
T Fusayasu,
S Gadrat,
I Garishvili,
A Glenn,
H Gong,
M Gonin,
J Gosset,
Y Goto,
R Granier de Cassagnac,
N Grau,
S V Greene,
M Grosse Perdekamp,
T Gunji,
H-A Gustafsson,
T Hachiya,
A Hadj Henni,
C Haegemann,
J S Haggerty,
H Hamagaki,
R Han,
H Harada,
E P Hartouni,
K Haruna,
E Haslum,
R Hayano,
M Heffner,
T K Hemmick,
T Hester,
X He,
H Hiejima,
J C Hill,
R Hobbs,
M Hohlmann,
W Holzmann,
K Homma,
B Hong,
T Horaguchi,
D Hornback,
S Huang,
T Ichihara,
R Ichimiya,
Y Ikeda,
K Imai,
J Imrek,
M Inaba,
Y Inoue,
D Isenhower,
L Isenhower,
M Ishihara,
T Isobe,
M Issah,
A Isupov,
D Ivanischev,
B V Jacak,
J Jia,
J Jin,
O Jinnouchi,
B M Johnson,
K S Joo,
D Jouan,
F Kajihara,
S Kametani,
N Kamihara,
J Kamin,
M Kaneta,
J H Kang,
H Kanou,
J Kapustinsky,
D Kawall,
A V Kazantsev,
T Kempel,
A Khanzadeev,
K M Kijima,
J Kikuchi,
B I Kim,
D H Kim,
D J Kim,
E Kim,
S H Kim,
E Kinney,
K Kiriluk,
A Kiss,
E Kistenev,
A Kiyomichi,
J Klay,
C Klein-Boesing,
L Kochenda,
V Kochetkov,
B Komkov,
M Konno,
J Koster,
D Kotchetkov,
A Kozlov,
A Král,
A Kravitz,
J Kubart,
G J Kunde,
N Kurihara,
K Kurita,
M Kurosawa,
M J Kweon,
Y Kwon,
G S Kyle,
R Lacey,
Y-S Lai,
Y S Lai,
J G Lajoie,
D Layton,
A Lebedev,
D M Lee,
K B Lee,
M K Lee,
T Lee,
M J Leitch,
M A L Leite,
B Lenzi,
P Liebing,
T Liska,
A Litvinenko,
H Liu,
M X Liu,
X Li,
B Love,
D Lynch,
C F Maguire,
Y I Makdisi,
A Malakhov,
M D Malik,
V I Manko,
E Mannel,
Y Mao,
L Masek,
H Masui,
F Matathias,
M McCumber,
P L McGaughey,
N Means,
B Meredith,
Y Miake,
P Mikes,
K Miki,
T E Miller,
A Milov,
S Mioduszewski,
M Mishra,
J T Mitchell,
M Mitrovski,
A K Mohanty,
Y Morino,
A Morreale,
D P Morrison,
T V Moukhanova,
D Mukhopadhyay,
J Murata,
S Nagamiya,
Y Nagata,
J L Nagle,
M Naglis,
M I Nagy,
I Nakagawa,
Y Nakamiya,
T Nakamura,
K Nakano,
J Newby,
M Nguyen,
T Niita,
B E Norman,
R Nouicer,
A S Nyanin,
E O'Brien,
S X Oda,
C A Ogilvie,
H Ohnishi,
H Okada,
K Okada,
M Oka,
O O Omiwade,
Y Onuki,
A Oskarsson,
M Ouchida,
K Ozawa,
R Pak,
D Pal,
A P T Palounek,
V Pantuev,
V Papavassiliou,
J Park,
W J Park,
S F Pate,
H Pei,
J-C Peng,
H Pereira,
V Peresedov,
D Yu Peressounko,
C Pinkenburg,
M L Purschke,
A K Purwar,
H Qu,
J Rak,
A Rakotozafindrabe,
I Ravinovich,
K F Read,
S Rembeczki,
M Reuter,
K Reygers,
V Riabov,
Y Riabov,
D Roach,
G Roche,
S D Rolnick,
A Romana,
M Rosati,
S S E Rosendahl,
P Rosnet,
P Rukoyatkin,
P Ruzicka,
V L Rykov,
B Sahlmueller,
N Saito,
T Sakaguchi,
S Sakai,
K Sakashita,
H Sakata,
V Samsonov,
S Sato,
T Sato,
S Sawada,
K Sedgwick,
J Seele,
R Seidl,
A Yu Semenov,
V Semenov,
R Seto,
D Sharma,
I Shein,
A Shevel,
T-A Shibata,
K Shigaki,
M Shimomura,
K Shoji,
P Shukla,
A Sickles,
C L Silva,
D Silvermyr,
C Silvestre,
K S Sim,
B K Singh,
C P Singh,
V Singh,
S Skutnik,
M Slunecka,
A Soldatov,
R A Soltz,
W E Sondheim,
S P Sorensen,
I V Sourikova,
F Staley,
P W Stankus,
E Stenlund,
M Stepanov,
A Ster,
S P Stoll,
T Sugitate,
C Suire,
A Sukhanov,
J Sziklai,
T Tabaru,
S Takagi,
E M Takagui,
A Taketani,
R Tanabe,
Y Tanaka,
K Tanida,
M J Tannenbaum,
A Taranenko,
P Tarján,
H Themann,
T L Thomas,
M Togawa,
A Toia,
J Tojo,
L Tomásek,
Y Tomita,
H Torii,
R S Towell,
V-N Tram,
I Tserruya,
Y Tsuchimoto,
C Vale,
H Valle,
H W Vanhecke,
A Veicht,
J Velkovska,
R Vertesi,
A A Vinogradov,
M Virius,
V Vrba,
E Vznuzdaev,
M Wagner,
D Walker,
X R Wang,
Y Watanabe,
F Wei,
J Wessels,
S N White,
D Winter,
C L Woody,
M Wysocki,
W Xie,
Y L Yamaguchi,
K Yamaura,
R Yang,
A Yanovich,
Z Yasin,
J Ying,
S Yokkaichi,
G R Young,
I Younus,
I E Yushmanov,
W A Zajc,
O Zaudtke,
C Zhang,
S Zhou,
J Zimányi,
L Zolin
University of Colorado, Boulder, Colorado 80309, USA.
Neutral pion transverse momentum (p_{T}) spectra at midrapidity (|y| less, similar0.35) were measured in Cu+Cu collisions at sqrt[s_{NN}]=22.4, 62.4, and 200 GeV. Relative to pi;{0} yields in p+p collisions scaled by the number of inelastic nucleon-nucleon collisions (N_{coll}) the pi;{0} yields for p_{T} greater, similar2 GeV/c in central Cu+Cu collisions are suppressed at 62.4 and 200 GeV whereas an enhancement is observed at 22.4 GeV. A comparison with a jet-quenching model suggests that final state parton energy loss dominates in central Cu+Cu collisions at 62.4 and 200 GeV, while the enhancement at 22.4 GeV is consistent with nuclear modifications in the initial state alone.
A Adare,
S Afanasiev,
C Aidala,
N N Ajitanand,
Y Akiba,
H Al-Bataineh,
J Alexander,
K Aoki,
L Aphecetche,
R Armendariz,
S H Aronson,
J Asai,
E T Atomssa,
R Averbeck,
T C Awes,
B Azmoun,
V Babintsev,
G Baksay,
L Baksay,
A Baldisseri,
K N Barish,
P D Barnes,
B Bassalleck,
S Bathe,
S Batsouli,
V Baublis,
A Bazilevsky,
S Belikov,
R Bennett,
Y Berdnikov,
A A Bickley,
J G Boissevain,
H Borel,
K Boyle,
M L Brooks,
H Buesching,
V Bumazhnov,
G Bunce,
S Butsyk,
S Campbell,
B S Chang,
J-L Charvet,
S Chernichenko,
J Chiba,
C Y Chi,
M Chiu,
I J Choi,
T Chujo,
P Chung,
A Churyn,
V Cianciolo,
C R Cleven,
B A Cole,
M P Comets,
P Constantin,
M Csanád,
T Csörgo,
T Dahms,
K Das,
G David,
M B Deaton,
K Dehmelt,
H Delagrange,
A Denisov,
D d'Enterria,
A Deshpande,
E J Desmond,
O Dietzsch,
A Dion,
M Donadelli,
O Drapier,
A Drees,
A K Dubey,
A Durum,
V Dzhordzhadze,
Y V Efremenko,
J Egdemir,
F Ellinghaus,
W S Emam,
A Enokizono,
H En'yo,
S Esumi,
K O Eyser,
D E Fields,
M Finger,
M Finger Jr,
F Fleuret,
S L Fokin,
Z Fraenkel,
J E Frantz,
A Franz,
A D Frawley,
K Fujiwara,
Y Fukao,
T Fusayasu,
S Gadrat,
I Garishvili,
A Glenn,
H Gong,
M Gonin,
J Gosset,
Y Goto,
R Granier de Cassagnac,
N Grau,
S V Greene,
M Grosse Perdekamp,
T Gunji,
H-A Gustafsson,
T Hachiya,
A Hadj Henni,
C Haegemann,
J S Haggerty,
H Hamagaki,
R Han,
H Harada,
E P Hartouni,
K Haruna,
E Haslum,
R Hayano,
M Heffner,
T K Hemmick,
T Hester,
X He,
H Hiejima,
J C Hill,
R Hobbs,
M Hohlmann,
W Holzmann,
K Homma,
B Hong,
T Horaguchi,
D Hornback,
T Ichihara,
K Imai,
M Inaba,
Y Inoue,
D Isenhower,
L Isenhower,
M Ishihara,
T Isobe,
M Issah,
A Isupov,
B V Jacak,
J Jia,
J Jin,
O Jinnouchi,
B M Johnson,
K S Joo,
D Jouan,
F Kajihara,
S Kametani,
N Kamihara,
J Kamin,
M Kaneta,
J H Kang,
H Kanou,
D Kawall,
A V Kazantsev,
A Khanzadeev,
J Kikuchi,
D H Kim,
D J Kim,
E Kim,
E Kinney,
A Kiss,
E Kistenev,
A Kiyomichi,
J Klay,
C Klein-Boesing,
L Kochenda,
V Kochetkov,
B Komkov,
M Konno,
D Kotchetkov,
A Kozlov,
A Král,
A Kravitz,
J Kubart,
G J Kunde,
N Kurihara,
K Kurita,
M J Kweon,
Y Kwon,
G S Kyle,
R Lacey,
Y-S Lai,
J G Lajoie,
A Lebedev,
D M Lee,
M K Lee,
T Lee,
M J Leitch,
M A L Leite,
B Lenzi,
T Liska,
A Litvinenko,
M X Liu,
X Li,
B Love,
D Lynch,
C F Maguire,
Y I Makdisi,
A Malakhov,
M D Malik,
V I Manko,
Y Mao,
L Masek,
H Masui,
F Matathias,
M McCumber,
P L McGaughey,
Y Miake,
P Mikes,
K Miki,
T E Miller,
A Milov,
S Mioduszewski,
M Mishra,
J T Mitchell,
M Mitrovski,
A Morreale,
D P Morrison,
T V Moukhanova,
D Mukhopadhyay,
J Murata,
S Nagamiya,
Y Nagata,
J L Nagle,
M Naglis,
I Nakagawa,
Y Nakamiya,
T Nakamura,
K Nakano,
J Newby,
M Nguyen,
B E Norman,
A S Nyanin,
E O'Brien,
S X Oda,
C A Ogilvie,
H Ohnishi,
H Okada,
K Okada,
M Oka,
O O Omiwade,
A Oskarsson,
M Ouchida,
K Ozawa,
R Pak,
D Pal,
A P T Palounek,
V Pantuev,
V Papavassiliou,
J Park,
W J Park,
S F Pate,
H Pei,
J-C Peng,
H Pereira,
V Peresedov,
D Yu Peressounko,
C Pinkenburg,
M L Purschke,
A K Purwar,
H Qu,
J Rak,
A Rakotozafindrabe,
I Ravinovich,
K F Read,
S Rembeczki,
M Reuter,
K Reygers,
V Riabov,
Y Riabov,
G Roche,
A Romana,
M Rosati,
S S E Rosendahl,
P Rosnet,
P Rukoyatkin,
V L Rykov,
B Sahlmueller,
N Saito,
T Sakaguchi,
S Sakai,
H Sakata,
V Samsonov,
S Sato,
S Sawada,
J Seele,
R Seidl,
V Semenov,
R Seto,
D Sharma,
I Shein,
A Shevel,
T-A Shibata,
K Shigaki,
M Shimomura,
K Shoji,
A Sickles,
C L Silva,
D Silvermyr,
C Silvestre,
K S Sim,
C P Singh,
V Singh,
S Skutnik,
M Slunecka,
A Soldatov,
R A Soltz,
W E Sondheim,
S P Sorensen,
I V Sourikova,
F Staley,
P W Stankus,
E Stenlund,
M Stepanov,
A Ster,
S P Stoll,
T Sugitate,
C Suire,
J Sziklai,
T Tabaru,
S Takagi,
E M Takagui,
A Taketani,
Y Tanaka,
K Tanida,
M J Tannenbaum,
A Taranenko,
P Tarján,
T L Thomas,
M Togawa,
A Toia,
J Tojo,
L Tomásek,
H Torii,
R S Towell,
V-N Tram,
I Tserruya,
Y Tsuchimoto,
C Vale,
H Valle,
H W van Hecke,
J Velkovska,
R Vertesi,
A A Vinogradov,
M Virius,
V Vrba,
E Vznuzdaev,
M Wagner,
D Walker,
X R Wang,
Y Watanabe,
J Wessels,
S N White,
D Winter,
C L Woody,
M Wysocki,
W Xie,
Y L Yamaguchi,
A Yanovich,
Z Yasin,
J Ying,
S Yokkaichi,
G R Young,
I Younus,
I E Yushmanov,
W A Zajc,
O Zaudtke,
C Zhang,
S Zhou,
J Zimányi,
L Zolin
University of Colorado, Boulder, Colorado 80309, USA.
Yields for J/psi production in Cu+Cu collisions at sqrt[s_{NN}]=200 GeV have been measured over the rapidity range |y|<2.2 and compared with results in p+p and Au+Au collisions at the same energy. The Cu+Cu data offer greatly improved precision over existing Au+Au data for J/psi production in collisions with small to intermediate numbers of participants, in the range where the quark-gluon plasma transition threshold is predicted to lie. Cold nuclear matter estimates based on ad hoc fits to d+Au data describe the Cu+Cu data up to N_{part} approximately 50, corresponding to a Bjorken energy density of at least 1.5 GeV/fm;{3}.
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