Longitudinalpolarization in heavy-ion collisions as a probe for QGP formation

Herrera, G.; Magnin, J.; Montaño, L. M.
January 2005
European Physical Journal C -- Particles & Fields;Jan2005, Vol. 39 Issue 1, p95
Academic Journal
We present an analysis of the longitudinalpolarization in ultrarelativistic heavy-ion collisions. The polarization of’s coming from the decay chainexhibits a very well differentiated behavior depending on the production region of the primordial’s. This effect reflects the different values of theratio in the QGP region, where nucleon-nucleon interactions take place in a hot and dense environment, and the peripherical region, in which ordinary nucleon-nucleon interactions occur. An increase in the longitudinalpolarization signals a strangeness enhancement which is thought of as a property of the QGP phase.


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