Two-Pion Intensity Interferometry in Au + Au @ 1.23$A$ GeV

Abstract

High-statistics ${\pi }^{-}{\pi }^{-}$ HBT data for non-central Au + Au collisions at 1.23$A$ GeV, measured with HADES at SIS18/GSI, are presented. The three-dimensional emission source is studied in dependence on pair transverse momentum and centrality. A tilt of the source relative to the beam axis is observed. The spatial extension and the tilt magnitude of the source decrease with transverse momentum. The spatial extension decreases and the tilt magnitude increases going from central to peripheral collisions. The derived eccentricity perpendicular to the beam axis fits well to the initial nucleonic overlap region at high transverse momentum.

arXiv comment4 pages, 2 figures, proceedings QM2019, parallel sessions collective dynamics III (Tue, 5th Nov, 18.20)

References in corpus (9)

• Glauber Modeling in High Energy Nuclear Collisions
• The High-Acceptance Dielectron Spectrometer HADES
• Two-particle interferometry for non-central heavy-ion collisions
• Centrality determination of Au+Au collisions at 1.23A GeV with HADES
• Azimuthal Dependence of Pion Interferometry at the AGS
• Tilted Pion Sources from Azimuthally Sensitive HBT Interferometry
• Symmetry constraints for the emission angle dependence of Hanbury Brown--Twiss radii
• Identical pion intensity interferometry in central Au+Au collisions at 1.23A GeV
• Azimuthally differential pion femtoscopy in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV