Approaches to QGP Detection (I): -Global observables -

• Info: ¥ Evidence of production of collectively behaving strongly interacting matter: fireball volume, energy & particle density, system lifetime, thermalization ...

• 1. Particle density: dN/dy

• Reaction geometry:

• 2. Energy density: dET/dy

• 2. Pressure/rescattering: Elliptic (& radial) collective flow