Abstract
J/ψ suppression has long been considered a sensitive signature of the formation of the Quark-Gluon Plasma (QGP) in relativistic heavy-ion collisions. In this letter, we present the first measurement of inclusive J/ψ production at mid-rapidity through the dimuon decay channel in Au+Au collisions at sNN=200 GeV with the STAR experiment. These measurements became possible after the installation of the Muon Telescope Detector was completed in 2014. The J/ψ yields are measured in a wide transverse momentum (pT) range of 0.15 GeV/c to 12 GeV/c from central to peripheral collisions. They extend the kinematic reach of previous measurements at RHIC with improved precision. In the 0-10% most central collisions, the J/ψ yield is suppressed by a factor of approximately 3 for pT>5 GeV/c relative to that in p+p collisions scaled by the number of binary nucleon-nucleon collisions. The J/ψ nuclear modification factor displays little dependence on pT in all centrality bins. Model calculations can qualitatively describe the data, providing further evidence for the color-screening effect experienced by J/ψ mesons in the QGP.
Original language | English |
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Article number | 134917 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 797 |
DOIs | |
State | Published - Oct 10 2019 |
Bibliographical note
Publisher Copyright:© 2019 The Author(s)
Funding
We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science, the U.S. National Science Foundation, the Ministry of Education and Science of the Russian Federation, National Natural Science Foundation of China, Chinese Academy of Sciences, the Ministry of Science and Technology of the People's Republic of China and the Ministry of Education of China, the National Research Foundation of Korea, Czech Science Foundation and Ministry of Education, Youth and Sports of the Czech Republic, Hungarian Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, New National Excellency Programme of the Hungarian Ministry of Human Capacities, Department of Atomic Energy and Department of Science and Technology of the Government of India, the National Science Centre of Poland, the Ministry of Science, Education and Sports of the Republic of Croatia, ROSATOM of Russia and German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF) and the Helmholtz Association. We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science , the U.S. National Science Foundation , the Ministry of Education and Science of the Russian Federation , National Natural Science Foundation of China , Chinese Academy of Sciences , the Ministry of Science and Technology of the People's Republic of China and the Ministry of Education of China , the National Research Foundation of Korea , Czech Science Foundation and Ministry of Education, Youth and Sports of the Czech Republic, Hungarian Nemzeti Kutatási Fejlesztési és Innovációs Hivatal , New National Excellency Programme of the Hungarian Ministry of Human Capacities , Department of Atomic Energy and Department of Science and Technology of the Government of India, the National Science Centre of Poland, the Ministry of Science, Education and Sports of the Republic of Croatia, ROSATOM of Russia and German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (BMBF) and the Helmholtz Association .
Funders | Funder number |
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Department of Atomic Energy and Department of Science and Technology | |
Hungarian Ministry of Human Capacities | |
RHIC Operations Group | |
National Science Foundation Arctic Social Science Program | 1913624 |
National Science Foundation Arctic Social Science Program | |
Office of Science Programs | |
Institute for Nuclear Physics | |
Riley Children's Foundation | |
Japan Society for the Promotion of Science | 19H05598 |
Japan Society for the Promotion of Science | |
National Natural Science Foundation of China (NSFC) | |
Ministerstvo Školství, Mládeže a Tělovýchovy | |
Grantová Agentura České Republiky | |
Ministry of Education of the People's Republic of China | |
Bundesministerium für Bildung und Forschung | |
Chinese Academy of Sciences | |
Ministry of Science and Technology of the People's Republic of China | |
Ministarstvo Obrazovanja, Znanosti i Sporta | |
Ministry for Education and Science of the Russian Federation | |
National Research Foundation of Korea | |
Narodowe Centrum Nauki | |
Max Delbrück Center for Molecular Medicine in the Helmholtz Association | |
Nemzeti Kutatási Fejlesztési és Innovációs Hivatal |
Keywords
- Color-screening
- J/ψ suppression
- Quark-gluon plasma
ASJC Scopus subject areas
- Nuclear and High Energy Physics