*Collective Flow in Heavy Ion
Collisions at CERN-SPS WA98*

- Motivation
- Flow observed at AGS
- Flow analysis at WA98
- WA98 Collaboration
- Plastic Ball
- Two Arm spectrometer
- Analysis of Plastic Ball
- Direction of b
- Sub-event analysis
- Mixed-Event analysis
- Proton Flow
- Anti-flow of pions
- Centrality Dependence
- Comparison between AGS and SPS

- Absorption Model
- Centrality dep. of Ab. Model

- Directed flow at target region
- Beam energy dependence of Directed Flow
- Smaller Directed Flow at SPS than AGS

- Analysis of mid-rapidity spectrometer
- Single particle spectra
- Azimuthal angle distribution
- Fourier Analysis

- Beam energy dependence of Elliptic Flow
- Intuitive Picture
- Elliptic nucleon distribution at freeze out
- HBT w.r.t. Reaction Plane

- Summary