Evidence for non-Gaussian tail in 3D pion emission source at the SPS

Abstract

The NA49 experiment at CERN SPS has acquired a huge data set of Pb+Pb events over a broad range of energy and centrality during the last several years. This high statistics data set, coupled with a state-of-the-art analysis technique, allows for the first model-independent extraction and energy scan of 3D emission sources for pion pairs at SPS energies. These 3D pion emission sources provide new insights into the nature of a long-range source previously reported by PHENIX at RHIC. The new results indicate that the pion source displays significant non-Gaussian tails in the longitudinal direction at 40 and 158 AGeV and in the outward direction at 158 AGeV.

Proceedings, QM06, Beijing, China

References in corpus (1)

• Analysis of Low-Momentum Correlations with Cartesian Harmonics

Cited by in corpus (4)

• Bose-Einstein correlations of pion pairs in central Pb+Pb collisions at CERN SPS energies
• Characteristic quantities of pion-emitting sources extracted by model-independent analysis in relativistic heavy ion collisions
• Transport model study of the $m_T$-scaling for $\Lambda$, K, and $\pi$ HBT-correlations
• Three-Dimensional two-pion source image from Pb+Pb Collisions at Sqrts_NN=17.3 GeV: New constraints for source breakup dynamics