期刊
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
卷 38, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0954-3899/38/12/124045
关键词
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资金
- US Department of Energy [DE-AC02-05CH11231, DE-FG02-05ER41367, DE-SC0004286, DE-SC0004104]
- Japan Society for the Promotion of Science [22740151]
- ExtreMe Matter Institute (EMMI)
- BMBF [06FY9092]
- Grants-in-Aid for Scientific Research [22740151] Funding Source: KAKEN
With the new viscous hydrodynamic + hadron cascade hybrid code VISHNU, a rather precise (O(25%)) extraction of the quark gluon plasma (QGP) shear viscosity (eta/s)(QGP) from heavy-ion elliptic flow data is possible if the initial eccentricity of the collision fireball is known with <5% accuracy. At this point, eccentricities from initial state models differ by up to 20%, leading to an O(100%) uncertainty for (eta/s)(QGP). It is shown that a simultaneous comparison of elliptic and triangular flow, upsilon(2) and upsilon(3), puts strong constraints on initial state models and can largely eliminate the present uncertainty in (eta/s)(QGP). The variation of the differential elliptic flow upsilon(2)(p(T)) for identified hadrons between RHIC and LHC energies provides additional tests of the evolution model.
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