Measuring the thermalization time

Details Measuring the thermalization time Measuring the thermalization time

2010-11-29

arxiv.org/abs/1011.6210v1

Physics

Nuclear Physics

Nuclear Theory

Presented at the XL International Symposium on Multiparticle Dynamics, 21-25 September 2010, Antwerp (Belgium)

Scientific paper

A new method of measuring the pressure anisotropy in the early stage of heavy-ion collisions is discussed. It is shown that the transverse momentum spectra, elliptic flow and interferometry radii are not sensitive to the early anisotropy. We propose the directed flow as a measure of the early transverse and longitudinal pressures. Calculations indicate that the transverse and longitudinal pressures equilibrate in less than 0.25 fm/c.

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