Open AccessHeavy-quark production and elliptic flow in Au + Au collisions atsNN=62.4GeV
Author(s) -
A. Adare,
C. Aidala,
N. N. Ajitanand,
Y. Akiba,
R. Akimoto,
H. Al-Ta’ani,
J. Alexander,
A. Angerami,
K. Aoki,
N. Apadula,
Y. Aramaki,
H. Asano,
E. C. Aschenauer,
E. T. Atomssa,
T. C. Awes,
B. Azmoun,
V. Babintsev,
M. Bai,
B. Bannier,
K. N. Barish,
B. Bassalleck,
S. Bathe,
V. Baublis,
S. Baumgart,
A. Bazilevsky,
R. Belmont,
A. Berdnikov,
Y. Berdnikov,
X. Bing,
D. Blau,
J. Bok,
K. Boyle,
M. L. Brooks,
H. Buesching,
V. Bumazhnov,
S. Butsyk,
S. Campbell,
P. Castera,
C.-H. Chen,
C. Y.,
M. Chiu,
I. J. Choi,
J. B. Choi,
S. Choi,
R. K. Choudhury,
P. Christiansen,
T. Chujo,
O. Chvála,
V. Cianciolo,
Z. H. Citron,
B. Cole,
M. Connors,
M. Csanád,
T. Csörgő,
S. Dairaku,
A. Datta,
M. Daugherity,
G. David,
A. Denisov,
A. Deshpande,
E. J. Desmond,
K. V. Dharmawardane,
O. Dietzsch,
L. Ding,
A. Dion,
M. Donadelli,
O. Drapier,
A. Drees,
K. A. Drees,
J. M. Durham,
A. Durum,
Laurent d’Orazio,
S. Edwards,
Y. V. Efremenko,
T. Engelmore,
A. Enokizono,
S. Esumi,
O. Eyser,
B. Fadem,
D. E. Fields,
M. Finger,
F. Fleuret,
S. Fokin,
J. E. Frantz,
A. Franz,
A. D. Frawley,
Y. Fukao,
T. Fusayasu,
K. Gainey,
C. Gal,
A. Garishvili,
I. Garishvili,
A. Glenn,
X. Gong,
M. Gonin,
Y. Goto,
R. Granier de Cassagnac,
N. Grau,
S. V. Greene,
M. Große Perdekamp,
T. Gunji,
Lei Guo,
H.-Å. Gustafsson,
T. Hachiya,
J. S. Haggerty,
K. I. Hahn,
H. Hamagaki,
J. Hanks,
K. Hashimoto,
E. Haslum,
R. Hayano,
X. He,
T. K. Hemmick,
T. Hester,
J. C. Hill,
R. S. Hollis,
K. Homma,
B. Hong,
T. Horaguchi,
Y. Hori,
S. Huang,
T. Ichihara,
H. Iinuma,
Y. Ikeda,
J. Imrek,
M. Inaba,
A. Iordanova,
D. Isenhower,
M. Issah,
D. Ivanishchev,
B. V. Jacak,
M. Javani,
J. Jia,
X. Jiang,
B. M. Johnson,
K. S. Joo,
D. Jouan,
D. S. Jumper,
J. Kamin,
S. Kaneti,
B. H. Kang,
J. H. Kang,
J. S. Kang,
J. Kapustinsky,
K. Karatsu,
M. Kasai,
D. Kawall,
A. V. Kazantsev,
T. Kempel,
A. Khanzadeev,
K. M. Kijima,
B. I. Kim,
C. Kim,
D. J. Kim,
E. J. Kim,
H. J. Kim,
K.-B. Kim,
Y.-J. Kim,
Yong Kyun Kim,
E. Kinney,
Á.Z. Kiss,
E. Kistenev,
J. Klatsky,
D. Kleinjan,
P. Kline,
Yosuke Komatsu,
B. Komkov,
J. Koster,
D. Kotchetkov,
D. Kotov,
A. Král,
F. Křížek,
G. J. Kunde,
K. Kurita,
M. Kurosawa,
Y. Kwon,
G. S. Kyle,
R. Lacey,
Y. S. Lai,
J. G. Lajoie,
A. Lebedev,
B. Lee,
D. M. Lee,
J. Lee,
K. B. Lee,
K. S. Lee,
S. H. Lee,
S. R. Lee,
M. J. Leitch,
M. A. L. Leite,
M. Leitgab,
B. Lewis,
S. H. Lim,
L. A. Linden Levy,
M. X. Liu,
B. Love,
C. Maguire,
Y. I. Makdisi,
M. Makek,
A. Manion,
V. I. Manko,
E. Mannel,
S. Masumoto,
M. McCumber,
P. L. McGaughey,
D. McGlinchey,
C. McKinney,
M. Mendoza,
B. Meredith,
Y. Miake,
T. Mibe,
A. C. Mignerey,
A. Milov,
D. K. Mishra,
J. T. Mitchell,
Yukitaka Miyachi,
S. Miyasaka,
A. K. Mohanty,
H. J. Moon,
D. P. Morrison,
S. Motschwiller,
T. V. Moukhanova,
T. Murakami,
J. Murata,
T. Nagae,
S. Nagamiya,
J. L. Nagle,
M. I. Nagy,
I. Nakagawa,
Y. Nakamiya,
K. R. Nakamura,
T. Nakamura,
K. Nakano,
C. Nattrass,
A. Nederlof,
M. Nihashi,
R. Nouicer,
N. Novitzky,
A. S. Nyanin,
E. O’Brien,
C. A. Ogilvie,
K. Okada,
Å. Oskarsson,
M. Ouchida,
K. Ozawa,
R. Pak,
V. Pantuev,
V. Papavassiliou,
B. H. Park,
I. H. Park,
S. K. Park,
S. F. Pate,
L. Patel,
H. Pei,
J.-C. Peng,
H. Pereira,
D. Yu. Peressounko,
R. Petti,
C. Pinkenburg,
R. P. Pisani,
M. Proissl,
M. L. Purschke,
H. Qu,
J. Rak,
I. Ravinovich,
K. F. Read,
D. Reynolds,
V. Riabov,
E. Richardson,
N. Riveli,
D. Roach,
G. Roche,
S. D. Rolnick,
M. Rosati,
B. Sahlmueller,
N. Saito,
T. Sakaguchi,
V. Samsonov,
M. Sano,
M. Sarsour,
S. Sawada,
K. Sedgwick,
R. Seidl,
A. Sen,
R. Seto,
D. Sharma,
I. Shein,
T.-A. Shibata,
K. Shigaki,
M. Shimomura,
K. Shoji,
P. Shukla,
A. Sickles,
C. L. Silva,
D. Silvermyr,
K. S. Sim,
B. K. Singh,
C. P. Singh,
V. Singh,
M. Slunečka,
R. A. Soltz,
W. E. Sondheim,
S. P. Sorensen,
M. Soumya,
I. V. Sourikova,
P. W. Stankus,
E. Stenlund,
M. Stepanov,
A. Ster,
S. P. Stoll,
T. Sugitate,
A. Sukhanov,
J. Sun,
J. Sziklai,
E. M. Takagui,
A. Takahara,
A. Taketani,
Y. Tanaka,
S. Taneja,
K. Tanida,
M. J. Tannenbaum,
S. Tarafdar,
A. Taranenko,
E. Tennant,
H. Themann,
T. Todoroki,
L. Tomášek,
M. Tomášek,
H. Torii,
R. S. Towell,
I. Tserruya,
Y. Tsuchimoto,
T. Tsuji,
C. Vale,
H. W. van Hecke,
M. Vargyas,
E. Vazquez-Zambrano,
A. Veicht,
J. Velkovska,
R. Vértesi,
M. Virius,
A. Vossen,
V. Vrba,
E. Vznuzdaev,
X. R. Wang,
D. Watanabe,
K. Watanabe,
Y. Watanabe,
F. Wei,
Rui Wei,
S. Whitaker,
S. N. White,
D. Winter,
S. Wolin,
C. L. Woody,
M. Wysocki,
Y. Yamaguchi,
Yongqiang Yang,
A. Yanovich,
J. Ying,
S. Yokkaichi,
Z. You,
I. Younus,
I. E. Yushmanov,
W. A. Zajc,
A. Zelenski
Publication year - 2015
Publication title -
physical review c
Language(s) - English
Resource type - Journals
eISSN - 1089-490X
pISSN - 0556-2813
DOI - 10.1103/physrevc.91.044907
Subject(s) - elliptic flow , physics , production (economics) , particle physics , nuclear physics , quark , flow (mathematics) , heavy ion , mechanics , quantum mechanics , economics , ion , macroeconomics
We present measurements of electrons and positrons from the semileptonic decays of heavy-flavor hadrons at midrapidity (vertical bar gamma vertical bar < 0.35) in Au + Au collisions at root(NN)-N-S = 62.4 GeV. The data were collected in 2010 by the PHENIX experiment that included the new hadron-blind detector. The invariant yield of electrons from heavy-flavor decays is measured as a function of transverse momentum in the range 1 < p(T)(e) < 5 GeV/c. The invariant yield per binary collision is slightly enhanced above the p + p reference in Au + Au 0%-20%, 20%-40%, and 40%-60% centralities at a comparable level. At this low beam energy this may be a result of the interplay between initial-state Cronin effects, final-state flow, and energy loss in medium. The v(2) of electrons from heavy-flavor decays is nonzero when averaged between 1.3 < p(T)(e) < 2.5 GeV/c for 0%-40% centrality collisions at root(NN)-N-S = 62.4 GeV. For 20%-40% centrality collisions, the v(2) at root(NN)-N-S = 62.4 GeV is smaller than that for heavy-flavor decays at root(NN)-N-S = 200 GeV. The v2 of the electrons from heavy-flavor decay at the lower beam energy is also smaller than v(2) for pions. Both results indicate that the heavy quarks interact with the medium formed in these collisions, but they may not be at the same level of thermalization with the medium as observed at root(NN)-N-S = 200 GeV
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom