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Phys Rev Lett. 2018 Feb 9;120(6):062301. doi: 10.1103/PhysRevLett.120.062301.

Beam-Energy Dependence of Directed Flow of Λ, Λ[over ¯], K^{±}, K_{s}^{0}, and ϕ in Au+Au Collisions.

Adamczyk L1, Adams JR2, Adkins JK3, Agakishiev G4, Aggarwal MM5, Ahammed Z6, Ajitanand NN7, Alekseev I8,9, Anderson DM10, Aoyama R11, Aparin A4, Arkhipkin D12, Aschenauer EC12, Ashraf MU13, Attri A5, Averichev GS4, Bai X14, Bairathi V15, Barish K16, Behera A7, Bellwied R17, Bhasin A18, Bhati AK5, Bhattarai P19, Bielcik J20, Bielcikova J21, Bland LC12, Bordyuzhin IG8, Bouchet J22, Brandenburg JD23, Brandin AV9, Brown D24, Bunzarov I4, Butterworth J23, Caines H25, Calderón de la Barca Sánchez M26, Campbell JM2, Cebra D26, Chakaberia I12,22,27, Chaloupka P20, Chang Z10, Chankova-Bunzarova N4, Chatterjee A6, Chattopadhyay S6, Chen X28, Chen JH29, Chen X30, Cheng J13, Cherney M31, Christie W12, Contin G32, Crawford HJ33, Das S14, De Silva LC31, Dedovich TG4, Deng J27, Derevschikov AA34, Didenko L12, Dilks C35, Dong X32, Drachenberg JL36, Draper JE26, Dunkelberger LE37, Dunlop JC12, Efimov LG4, Elsey N38, Engelage J33, Eppley G23, Esha R37, Esumi S11, Evdokimov O39, Ewigleben J24, Eyser O12, Fatemi R3, Fazio S12, Federic P21, Federicova P20, Fedorisin J4, Feng Z14, Filip P4, Finch E40, Fisyak Y12, Flores CE26, Fujita J31, Fulek L1, Gagliardi CA10, Garand D41, Geurts F23, Gibson A42, Girard M43, Grosnick D42, Gunarathne DS44, Guo Y22, Gupta A18, Gupta S18, Guryn W12, Hamad AI22, Hamed A10, Harlenderova A20, Harris JW25, He L41, Heppelmann S35, Heppelmann S26, Hirsch A41, Horvat S25, Huang X13, Huang B39, Huang T45, Huang HZ37, Humanic TJ2, Huo P7, Igo G37, Jacobs WW46, Jentsch A19, Jia J12,7, Jiang K28, Jowzaee S38, Judd EG33, Kabana S22, Kalinkin D46, Kang K13, Kapukchyan D16, Kauder K38, Ke HW12, Keane D22, Kechechyan A4, Khan Z39, Kikoła DP43, Kim C16, Kisel I47, Kisiel A43, Kochenda L9, Kocmanek M21, Kollegger T47, Kosarzewski LK43, Kraishan AF44, Krauth L16, Kravtsov P9, Krueger K48, Kulathunga N17, Kumar L5, Kvapil J20, Kwasizur JH46, Lacey R7, Landgraf JM12, Landry KD37, Lauret J12, Lebedev A12, Lednicky R4, Lee JH12, Li C28, Li X28, Li Y13, Li W29, Lidrych J20, Lin T46, Lisa MA2, Liu P7, Liu H46, Liu Y10, Liu F14, Ljubicic T12, Llope WJ38, Lomnitz M32, Longacre RS12, Luo S39, Luo X14, Ma YG29, Ma L29, Ma R12, Ma GL29, Magdy N7, Majka R25, Mallick D15, Margetis S22, Markert C19, Matis HS32, Meehan K26, Mei JC27, Miller ZW39, Minaev NG34, Mioduszewski S10, Mishra D15, Mizuno S32, Mohanty B15, Mondal MM49, Morozov DA34, Mustafa MK32, Nasim M37, Nayak TK6, Nelson JM33, Nie M29, Nigmatkulov G9, Niida T38, Nogach LV34, Nonaka T11, Nurushev SB34, Odyniec G32, Ogawa A12, Oh K50, Okorokov VA9, Olvitt D44, Page BS12, Pak R12, Pandit Y39, Panebratsev Y4, Pawlik B51, Pei H14, Perkins C33, Pile P12, Pluta J43, Poniatowska K43, Porter J32, Posik M44, Pruthi NK5, Przybycien M1, Putschke J38, Qiu H41, Quintero A44, Ramachandran S3, Ray RL19, Reed R24, Rehbein MJ31, Ritter HG32, Roberts JB23, Rogachevskiy OV4, Romero JL26, Roth JD31, Ruan L12, Rusnak J21, Rusnakova O20, Sahoo NR10, Sahu PK49, Salur S52, Sandweiss J25, Saur M21, Schambach J19, Schmah AM32, Schmidke WB12, Schmitz N53, Schweid BR7, Seger J31, Sergeeva M37, Seto R16, Seyboth P53, Shah N29, Shahaliev E4, Shanmuganathan PV24, Shao M28, Sharma A18, Sharma MK18, Shen WQ29, Shi SS14, Shi Z32, Shou QY29, Sichtermann EP32, Sikora R1, Simko M21, Singha S22, Skoby MJ46, Smirnov N25, Smirnov D12, Solyst W46, Song L17, Sorensen P12, Spinka HM48, Srivastava B41, Stanislaus TDS42, Strikhanov M9, Stringfellow B41, Suaide AAP54, Sugiura T11, Sumbera M21, Summa B35, Sun Y28, Sun XM14, Sun X14, Surrow B44, Svirida DN8, Tang Z28, Tang AH12, Taranenko A9, Tarnowsky T55, Tawfik A56, Thäder J32, Thomas JH32, Timmins AR17, Tlusty D23, Todoroki T12, Tokarev M4, Trentalange S37, Tribble RE10, Tribedy P12, Tripathy SK49, Trzeciak BA20, Tsai OD37, Ullrich T12, Underwood DG48, Upsal I2, Van Buren G12, van Nieuwenhuizen G12, Vasiliev AN34, Videbæk F12, Vokal S4, Voloshin SA38, Vossen A46, Wang G37, Wang Y14, Wang F41, Wang Y13, Webb JC12, Webb G12, Wen L37, Westfall GD55, Wieman H32, Wissink SW46, Witt R57, Wu Y22, Xiao ZG13, Xie G28, Xie W41, Xu J14, Xu Z12, Xu QH27, Xu YF29, Xu N32, Yang S12, Yang Y45, Yang C27, Yang Q28, Ye Z39, Ye Z39, Yi L25, Yip K12, Yoo IK50, Yu N14, Zbroszczyk H43, Zha W28, Zhang Z29, Zhang JB14, Zhang J30, Zhang S28, Zhang Y28, Zhang XP13, Zhang J32, Zhang S29, Zhao J41, Zhong C29, Zhou C29, Zhou L28, Zhu X13, Zhu Z27, Zyzak M47; STAR Collaboration.

Author information

1
AGH University of Science and Technology, FPACS, Cracow 30-059, Poland.
2
Ohio State University, Columbus, Ohio 43210.
3
University of Kentucky, Lexington, Kentucky 40506-0055.
4
Joint Institute for Nuclear Research, Dubna, 141 980, Russia.
5
Panjab University, Chandigarh 160014, India.
6
Variable Energy Cyclotron Centre, Kolkata 700064, India.
7
State University of New York, Stony Brook, New York 11794.
8
Alikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, Russia.
9
National Research Nuclear University MEPhI, Moscow 115409, Russia.
10
Texas A&M University, College Station, Texas 77843.
11
University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
12
Brookhaven National Laboratory, Upton, New York 11973.
13
Tsinghua University, Beijing 100084.
14
Central China Normal University, Wuhan, Hubei 430079.
15
National Institute of Science Education and Research, HBNI, Jatni 752050, India.
16
University of California, Riverside, California 92521.
17
University of Houston, Houston, Texas 77204.
18
University of Jammu, Jammu 180001, India.
19
University of Texas, Austin, Texas 78712.
20
Czech Technical University in Prague, FNSPE, Prague, 115 19, Czech Republic.
21
Nuclear Physics Institute AS CR, 250 68 Prague, Czech Republic.
22
Kent State University, Kent, Ohio 44242.
23
Rice University, Houston, Texas 77251.
24
Lehigh University, Bethlehem, Pennsylvania 18015.
25
Yale University, New Haven, Connecticut 06520.
26
University of California, Davis, California 95616.
27
Shandong University, Jinan, Shandong 250100.
28
University of Science and Technology of China, Hefei, Anhui 230026.
29
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800.
30
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000.
31
Creighton University, Omaha, Nebraska 68178.
32
Lawrence Berkeley National Laboratory, Berkeley, California 94720.
33
University of California, Berkeley, California 94720.
34
Institute of High Energy Physics, Protvino 142281, Russia.
35
Pennsylvania State University, University Park, Pennsylvania 16802.
36
Lamar University, Physics Department, Beaumont, Texas 77710.
37
University of California, Los Angeles, California 90095.
38
Wayne State University, Detroit, Michigan 48201.
39
University of Illinois at Chicago, Chicago, Illinois 60607.
40
Southern Connecticut State University, New Haven, Connecticut 06515.
41
Purdue University, West Lafayette, Indiana 47907.
42
Valparaiso University, Valparaiso, Indiana 46383.
43
Warsaw University of Technology, Warsaw 00-661, Poland.
44
Temple University, Philadelphia, Pennsylvania 19122.
45
National Cheng Kung University, Tainan 70101.
46
Indiana University, Bloomington, Indiana 47408.
47
Frankfurt Institute for Advanced Studies FIAS, Frankfurt 60438, Germany.
48
Argonne National Laboratory, Argonne, Illinois 60439.
49
Institute of Physics, Bhubaneswar 751005, India.
50
Pusan National University, Pusan 46241, Korea.
51
Institute of Nuclear Physics PAN, Cracow 31-342, Poland.
52
Rutgers University, Piscataway, New Jersey 08854.
53
Max-Planck-Institut fur Physik, Munich 80805, Germany.
54
Universidade de Sao Paulo, Sao Paulo, Brazil, 05314-970.
55
Michigan State University, East Lansing, Michigan 48824.
56
World Laboratory for Cosmology and Particle Physics (WLCAPP), Cairo 11571, Egypt.
57
United States Naval Academy, Annapolis, Maryland 21402.

Abstract

Rapidity-odd directed-flow measurements at midrapidity are presented for Λ, Λ[over ¯], K^{±}, K_{s}^{0}, and ϕ at sqrt[s_{NN}]=7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV in Au+Au collisions recorded by the Solenoidal Tracker detector at the Relativistic Heavy Ion Collider. These measurements greatly expand the scope of data available to constrain models with differing prescriptions for the equation of state of quantum chromodynamics. Results show good sensitivity for testing a picture where flow is assumed to be imposed before hadron formation and the observed particles are assumed to form via coalescence of constituent quarks. The pattern of departure from a coalescence-inspired sum rule can be a valuable new tool for probing the collision dynamics.

PMID:
29481217
DOI:
10.1103/PhysRevLett.120.062301
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