Isospin and isospin/strangeness correlations in relativistic heavy ion collisions

Details Isospin and isospin/strangeness correlations in relativistic heavy ion collisions Isospin and isospin/strangeness correlations in relativistic heavy ion collisions

2007-12-11

arxiv.org/abs/0712.1778v1

Eur.Phys.J.80:22002,2007

Physics

Nuclear Physics

Nuclear Theory

11 pages

Scientific paper

10.1209/0295-5075/80/22002

A fundamental symmetry of nuclear and particle physics is isospin whose third component is the Gell-Mann/Nishijima expression I(z)=Q-(B+S)/2 . The role of isospin symmetry in relativistic heavy ion collisions is studied. An isospin I(z), strangeness S correlation is shown to be a direct and simple measure of flavor correlations, vanishing in a Qg phase of uncorrelated flavors in both symmetric N=Z and asymmetric N not equal to Z systems. By contrast, in a hadron phase, a I(z)/S correlation exists as long as the electrostatic charge chemical potential mu(Q)does not equal 0 as in N not equal to Z asymmetric systems. A parallel is drawn with a Zeeman effect which breaks a spin degeneracy

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