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Phys Rev Lett. 2016 Feb 12;116(6):062301. doi: 10.1103/PhysRevLett.116.062301. Epub 2016 Feb 10.

Centrality and Transverse Momentum Dependence of Elliptic Flow of Multistrange Hadrons and ϕ Meson in Au+Au Collisions at √[sNN]=200  GeV.

Adamczyk L1, Adkins JK2, Agakishiev G3, Aggarwal MM4, Ahammed Z5, Alekseev I6, Aparin A3, Arkhipkin D7, Aschenauer EC7, Averichev GS3, Bairathi V8, Banerjee A5, Bellwied R9, Bhasin A10, Bhati AK4, Bhattarai P11, Bielcik J12, Bielcikova J13, Bland LC7, Bordyuzhin IG6, Bouchet J14, Brandin AV15, Bunzarov I3, Butterworth J16, Caines H17, Calderón de la Barca Sánchez M18, Campbell JM19, Cebra D18, Cervantes MC20, Chakaberia I7, Chaloupka P12, Chang Z20, Chattopadhyay S5, Chen JH21, Chen X22, Cheng J23, Cherney M24, Christie W7, Contin G25, Crawford HJ26, Das S27, De Silva LC24, Debbe RR7, Dedovich TG3, Deng J28, Derevschikov AA29, di Ruzza B7, Didenko L7, Dilks C30, Dong X25, Drachenberg JL31, Draper JE18, Du CM22, Dunkelberger LE32, Dunlop JC7, Efimov LG3, Engelage J26, Eppley G16, Esha R32, Evdokimov O33, Eyser O7, Fatemi R2, Fazio S7, Federic P13, Fedorisin J3, Feng Z34, Filip P3, Fisyak Y7, Flores CE18, Fulek L1, Gagliardi CA20, Garand D35, Geurts F16, Gibson A31, Girard M36, Greiner L25, Grosnick D31, Gunarathne DS37, Guo Y38, Gupta S10, Gupta A10, Guryn W7, Hamad A14, Hamed A20, Haque R8, Harris JW17, He L35, Heppelmann S7, Heppelmann S30, Hirsch A35, Hoffmann GW11, Hofman DJ33, Horvat S17, Huang X23, Huang B33, Huang HZ32, Huck P34, Humanic TJ19, Igo G32, Jacobs WW39, Jang H40, Jiang K38, Judd EG26, Kabana S14, Kalinkin D6, Kang K23, Kauder K41, Ke HW7, Keane D14, Kechechyan A3, Khan ZH33, Kikoła DP36, Kisel I42, Kisiel A36, Kochenda L15, Koetke DD31, Kollegger T42, Kosarzewski LK36, Kraishan AF37, Kravtsov P15, Krueger K43, Kulakov I42, Kumar L4, Kycia RA44, Lamont MA7, Landgraf JM7, Landry KD32, Lauret J7, Lebedev A7, Lednicky R3, Lee JH7, Li ZM34, Li W21, Li X7, Li X37, Li C38, Li Y23, Lisa MA19, Liu F34, Ljubicic T7, Llope WJ41, Lomnitz M14, Longacre RS7, Luo X34, Ma YG21, Ma GL21, Ma L21, Ma R7, Magdy N45, Majka R17, Manion A25, Margetis S14, Markert C11, Masui H25, Matis HS25, McDonald D9, Meehan K18, Minaev NG29, Mioduszewski S20, Mishra D8, Mohanty B8, Mondal MM20, Morozov DA29, Mustafa MK25, Nandi BK46, Nasim M32, Nayak TK5, Nigmatkulov G15, Nogach LV29, Noh SY40, Novak J47, Nurushev SB29, Odyniec G25, Ogawa A7, Oh K48, Okorokov V15, Olvitt D Jr37, Page BS7, Pak R7, Pan YX32, Pandit Y33, Panebratsev Y3, Pawlik B44, Pei H34, Perkins C26, Peterson A19, Pile P7, Planinic M49, Pluta J36, Poljak N49, Poniatowska K36, Porter J25, Posik M37, Poskanzer AM25, Putschke J41, Qiu H25, Quintero A14, Ramachandran S2, Raniwala R50, Raniwala S50, Ray RL11, Ritter HG25, Roberts JB16, Rogachevskiy OV3, Romero JL18, Roy A5, Ruan L7, Rusnak J13, Rusnakova O12, Sahoo NR20, Sahu PK27, Sakrejda I25, Salur S25, Sandweiss J17, Sarkar A46, Schambach J11, Scharenberg RP35, Schmah AM25, Schmidke WB7, Schmitz N51, Seger J24, Seyboth P51, Shah N21, Shahaliev E3, Shanmuganathan PV14, Shao M38, Sharma B4, Sharma MK10, Shen WQ21, Shi SS34, Shou QY21, Sichtermann EP25, Sikora R1, Simko M13, Singha S14, Skoby MJ39, Smirnov D7, Smirnov N17, Song L9, Sorensen P7, Spinka HM43, Srivastava B35, Stanislaus TD31, Stepanov M35, Stock R42, Strikhanov M15, Stringfellow B35, Sumbera M13, Summa B30, Sun X25, Sun XM34, Sun Y38, Sun Z22, Surrow B37, Svirida N6, Szelezniak MA25, Tang AH7, Tang Z38, Tarnowsky T47, Tawfik A45, Thomas JH25, Timmins AR9, Tlusty D13, Tokarev M3, Trentalange S32, Tribble RE20, Tribedy P5, Tripathy SK27, Trzeciak BA12, Tsai OD32, Ullrich T7, Underwood DG43, Upsal I19, Van Buren G7, van Nieuwenhuizen G7, Vandenbroucke M37, Varma R46, Vasiliev AN29, Vertesi R13, Videbæk F7, Viyogi YP5, Vokal S3, Voloshin SA41, Vossen A39, Wang Y23, Wang G32, Wang JS22, Wang H7, Wang Y34, Wang F35, Webb JC7, Webb G7, Wen L32, Westfall GD47, Wieman H25, Wissink SW39, Witt R52, Wu YF34, Wu Y14, Xiao ZG23, Xie W35, Xin K16, Xu N25, Xu Z7, Xu QH28, Xu YF21, Xu H22, Yang Q38, Yang Y34, Yang Y22, Yang S38, Yang C38, Ye Z33, Yepes P16, Yi L17, Yip K7, Yoo IK48, Yu N34, Zbroszczyk H36, Zha W38, Zhang Z21, Zhang Y38, Zhang JB34, Zhang J28, Zhang S21, Zhang J22, Zhang XP23, Zhao J34, Zhong C21, Zhou L38, Zhu X23, Zoulkarneeva Y3, Zyzak M42; STAR Collaboration.

Author information

1
AGH University of Science and Technology, Cracow 30-059, Poland.
2
University of Kentucky, Lexington, Kentucky 40506-0055, USA.
3
Joint Institute for Nuclear Research, Dubna 141 980, Russia.
4
Panjab University, Chandigarh 160014, India.
5
Variable Energy Cyclotron Centre, Kolkata 700064, India.
6
Alikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, Russia.
7
Brookhaven National Laboratory, Upton, New York 11973, USA.
8
National Institute of Science Education and Research, Jatni 752050, Odisha, India.
9
University of Houston, Houston, Texas 77204, USA.
10
University of Jammu, Jammu 180001, India.
11
University of Texas, Austin, Texas 78712, USA.
12
Czech Technical University in Prague, FNSPE, Prague 115 19, Czech Republic.
13
Nuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech Republic.
14
Kent State University, Kent, Ohio 44242, USA.
15
Moscow Engineering Physics Institute, Moscow 115409, Russia.
16
Rice University, Houston, Texas 77251, USA.
17
Yale University, New Haven, Connecticut 06520, USA.
18
University of California, Davis, California 95616, USA.
19
Ohio State University, Columbus, Ohio 43210, USA.
20
Texas A&M University, College Station, Texas 77843, USA.
21
Shanghai Institute of Applied Physics, Shanghai 201800, China.
22
Institute of Modern Physics, Lanzhou 730000, China.
23
Tsinghua University, Beijing 100084, China.
24
Creighton University, Omaha, Nebraska 68178, USA.
25
Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
26
University of California, Berkeley, California 94720, USA.
27
Institute of Physics, Bhubaneswar 751005, India.
28
Shandong University, Jinan, Shandong 250100, China.
29
Institute of High Energy Physics, Protvino 142281, Russia.
30
Pennsylvania State University, University Park, Pennsylvania 16802, USA.
31
Valparaiso University, Valparaiso, Indiana 46383, USA.
32
University of California, Los Angeles, California 90095, USA.
33
University of Illinois at Chicago, Chicago, Illinois 60607, USA.
34
Central China Normal University (HZNU), Wuhan 430079, China.
35
Purdue University, West Lafayette, Indiana 47907, USA.
36
Warsaw University of Technology, Warsaw 00-661, Poland.
37
Temple University, Philadelphia, Pennsylvania 19122, USA.
38
University of Science and Technology of China, Hefei 230026, China.
39
Indiana University, Bloomington, Indiana 47408, USA.
40
Korea Institute of Science and Technology Information, Daejeon 305-701, Korea.
41
Wayne State University, Detroit, Michigan 48201, USA.
42
Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany.
43
Argonne National Laboratory, Argonne, Illinois 60439, USA.
44
Institute of Nuclear Physics PAN, Cracow 31-342, Poland.
45
World Laboratory for Cosmology and Particle Physics (WLCAPP), Cairo 11571, Egypt.
46
Indian Institute of Technology, Mumbai 400076, India.
47
Michigan State University, East Lansing, Michigan 48824, USA.
48
Pusan National University, Pusan 609735, Republic of Korea.
49
University of Zagreb, Zagreb HR-10002, Croatia.
50
University of Rajasthan, Jaipur 302004, India.
51
Max-Planck-Institut fur Physik, Munich 80805, Germany.
52
United States Naval Academy, Annapolis, Maryland 21402, USA.

Abstract

We present high precision measurements of elliptic flow near midrapidity (|y|<1.0) for multistrange hadrons and ϕ meson as a function of centrality and transverse momentum in Au+Au collisions at center of mass energy √[sNN]=200  GeV. We observe that the transverse momentum dependence of ϕ and Ω v2 is similar to that of π and p, respectively, which may indicate that the heavier strange quark flows as strongly as the lighter up and down quarks. This observation constitutes a clear piece of evidence for the development of partonic collectivity in heavy-ion collisions at the top RHIC energy. Number of constituent quark scaling is found to hold within statistical uncertainty for both 0%-30% and 30%-80% collision centrality. There is an indication of the breakdown of previously observed mass ordering between ϕ and proton v2 at low transverse momentum in the 0%-30% centrality range, possibly indicating late hadronic interactions affecting the proton v2.

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