Tuesday, October 5, 2010, 11:00 am — Small Seminar Room, Bldg. 510
PHENIX recently published precision measurement of neutral pion azimuthal anisotropy in Au+Au collisions at sqrt(snn)=200 GeV in a broad $p_T$ range (1-18 GeV/c) [1]. A striking observation is that the measured azimuthal anisotropy exceeds most pQCD based energy loss model calculations by almost 100%, even in the $p_T$ regions (>9
GeV/c) where the pertubative methods were believed to be valid.
However, most of these calculations have not considered some important uncertainties in the initial geometry, such as eccentricity fluctuation and saturation effect. In this talk, I discuss this measurement, followed by a detailed exploration of the uncertainties of the initial geometry using a jet absorption model [2], and a discussion on its implications for the current picture of energy loss.
6744 | INT/EXT | Events Calendar
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