期刊
PHYSICAL REVIEW LETTERS
卷 127, 期 26, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.127.262301
关键词
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资金
- NERSC Center at LBNL
- Open Science Grid consortium
- Office of Nuclear Physics within the U.S. DOE Office of Science
- U.S. National Science Foundation
- Ministry of Education and Science of the Russian Federation
- National Natural Science Foundation of China
- Chinese Academy of Science
- Ministry of Science and Technology of China
- Chinese Ministry of Education
- Higher Education Sprout Project by Ministry of Education at NCKU
- National Research Foundation of Korea
- Czech Science Foundation
- Ministry of Education, Youth and Sports of the Czech Republic
- Hungarian National Research, Development and Innovation Office
- New National Excellency Programme of the Hungarian Ministry of Human Capacities
- Department of Atomic Energy
- Department of Science and Technology of the Government of India
- National Science Centre of Poland
- Ministry of Science, Education and Sportsof the Republic of Croatia
- RosAtom of Russia
- German Bundesministerium fur Bildung, Wissenschaft, Forschung and Technologie (BMBF)
- Helmholtz Association
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT)
- Japan Society for the Promotion of Science (JSPS)
- RHIC Operations Group
- RCF at BNL
This study investigates the transition from quark-gluon plasma to hadronic matter in high-energy nuclear collisions using first-principle lattice QCD calculations and experimental data. The results suggest a smooth crossover phenomenon under certain energy conditions.
According to first-principle lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region mu(B) <= T-c. In this range the ratio, C-6/C-2, of net-baryon distributions are predicted to be negative. In this Letter, we report the first measurement of the midrapidity net-proton C-6/C-2 from 27, 54.4, and 200 GeV Au + Au collisions at the Relativistic Heavy Ion Collider (RHIC). The dependence on collision centrality and kinematic acceptance in (p(T) , y) are analyzed. While for 27 and 54.4 GeV collisions the C-6/C-2 values are close to zero within uncertainties, it is observed that for 200 GeV collisions, the C-6/C-2 ratio becomes progressively negative from peripheral to central collisions. Transport model calculations without critical dynamics predict mostly positive values except for the most central collisions within uncertainties. These observations seem to favor a smooth crossover in the high-energy nuclear collisions at top RHIC energy.
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