Portal de Periódicos da CAPES

Space-time extensions from space-time densities and Bose-Einstein correlations

1997; American Institute of Physics; Volume: 55; Issue: 2 Linguagem: Inglês

10.1103/physrevc.55.954

1538-4497

B. R. Schlei,

Quantum Chromodynamics and Particle Interactions

Using a (3+1)-dimensional solution of the relativistic Euler-equations for Pb+Pb at 160$A$ GeV, space-time extensions of kaon emission zones are calculated from space-time densities and compared to the inverse widths of two-kaon Bose-Einstein correlation functions. The comparison shows a satisfactory agreement and it is concluded that because of the Gaussian shape of the kaon correlation functions, the space-time parameters of the kaon source can be calculated directly from space-time densities. In the case of intensity interferometry of identical pions this simplification is not recommended when applying Gaussian fits because of the present strong effects of resonance decays. The whole discussion is based on the assumption that hadron emission in ultrarelativistic heavy-ion collisions is purely chaotic or that coherence is at least negligible.