First Observation of the Directed Flow of D^{0} and D^{0}[over ¯] in Au+Au Collisions at sqrt[s_{NN}]=200 GeV

. 2019 Oct 18 ; 123 (16) : 162301.

Status PubMed-not-MEDLINE Jazyk angličtina Země Spojené státy americké Médium print

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid31702332

We report the first measurement of rapidity-odd directed flow (v_{1}) for D^{0} and D^{0}[over ¯] mesons at midrapidity (|y|<0.8) in Au+Au collisions at sqrt[s_{NN}]=200 GeV using the STAR detector at the Relativistic Heavy Ion Collider. In 10-80% Au+Au collisions, the slope of the v_{1} rapidity dependence (dv_{1}/dy), averaged over D^{0} and D^{0}[over ¯] mesons, is -0.080±0.017(stat)±0.016(syst) for transverse momentum p_{T} above 1.5 GeV/c. The absolute value of D^{0} meson dv_{1}/dy is about 25 times larger than that for charged kaons, with 3.4σ significance. These data give a unique insight into the initial tilt of the produced matter, and offer constraints on the geometric and transport parameters of the hot QCD medium created in relativistic heavy-ion collisions.

Abilene Christian University Abilene Texas 79699

AGH University of Science and Technology FPACS Cracow 30 059 Poland

Alikhanov Institute for Theoretical and Experimental Physics Moscow 117218 Russia

American University in Cairo New Cairo 11835 Egypt

Argonne National Laboratory Argonne Illinois 60439

Brookhaven National Laboratory Upton New York 11973

Central China Normal University Wuhan Hubei 430079

Creighton University Omaha Nebraska 68178

Czech Technical University Prague FNSPE Prague 115 19 Czech Republic

Eötvös Loránd University Budapest H 1117 Hungary

Frankfurt Institute for Advanced Studies FIAS Frankfurt 60438 Germany

Fudan University Shanghai 200433

Huzhou University Huzhou Zhejiang 313000

Indian Institute of Science Education and Research Berhampur 760010 India

Indian Institute of Science Education and Research Tirupati Tirupati 517507 India

Indian Institute Technology Patna Bihar 801103 India

Indiana University Bloomington Indiana 47408

Institute of Physics Bhubaneswar 751005 India

Joint Institute for Nuclear Research Dubna 141 980 Russia

Kent State University Kent Ohio 44242

Lawrence Berkeley National Laboratory Berkeley California 94720

Lehigh University Bethlehem Pennsylvania 18015

Max Planck Institut für Physik Munich 80805 Germany

Michigan State University East Lansing Michigan 48824

National Cheng Kung University Tainan 70101

National Institute of Science Education and Research HBNI Jatni 752050 India

National Research Nuclear University MEPhI Moscow 115409 Russia

Nile University ECPT 12677 Giza Egypt

NRC Kurchatov Institute Institute of High Energy Physics Protvino 142281 Russia

Nuclear Physics Institute of the CAS Rez 250 68 Czech Republic

Ohio State University Columbus Ohio 43210

Panjab University Chandigarh 160014 India

Pennsylvania State University University Park Pennsylvania 16802

Purdue University West Lafayette Indiana 47907

Rice University Houston Texas 77251

Rutgers University Piscataway New Jersey 08854

Shandong University Qingdao Shandong 266237

Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800

Southern Connecticut State University New Haven Connecticut 06515

State University of New York Stony Brook New York 11794

Technische Universität Darmstadt Darmstadt 64289 Germany

Temple University Philadelphia Pennsylvania 19122

Texas A and M University College Station Texas 77843

Tsinghua University Beijing 100084

United States Naval Academy Annapolis Maryland 21402

Universidade de São Paulo São Paulo Brazil 05314 970

University of California Berkeley California 94720

University of California Davis California 95616

University of California Los Angeles California 90095

University of California Riverside California 92521

University of Heidelberg Heidelberg 69120 Germany

University of Houston Houston Texas 77204

University of Illinois at Chicago Chicago Illinois 60607

University of Jammu Jammu 180001 India

University of Kentucky Lexington Kentucky 40506 0055

University of Science and Technology of China Hefei Anhui 230026

University of Texas Austin Texas 78712

University of Tsukuba Tsukuba Ibaraki 305 8571 Japan

Valparaiso University Valparaiso Indiana 46383

Variable Energy Cyclotron Centre Kolkata 700064 India

Warsaw University of Technology Warsaw 00 661 Poland

Wayne State University Detroit Michigan 48201

Yale University New Haven Connecticut 06520

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