期刊
EUROPEAN PHYSICAL JOURNAL C
卷 76, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-016-4237-z
关键词
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资金
- U.S. Department of Energy Office of Science, Office of Nuclear Physics [DE-FG02-97ER-41014]
- U.S. Department of Energy, DOE [DE-SC0008132]
- National Natural Science Foundation of China [11305040]
In high-energy collisions of heavy ions, experimental findings of collective flow are customarily associated with the presence of a thermalized medium expanding according to the laws of hydrodynamics. Recently, the ATLAS, CMS, and ALICE experiments found signals of the same type and magnitude in ultrarelativistic proton-proton collisions. In this study, the state-of-the-art hydrodynamic model SONIC is used to simulate the systems created in p+p collisions. By varying the size of the second-order transport coefficients, the range of applicability of hydrodynamics itself to the systems created in p+p collisions is quantified. It is found that hydrodynamics can give quantitatively reliable results for the particle spectra and the elliptic momentum anisotropy coefficient . Using a simple geometric model of the proton based on the elastic form factor leads to results of similar type and magnitude to those found in experiment when allowing for a small bulk viscosity coefficient.
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