Chiral Morphing

Ngee Pong Chang

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arXiv · hep-ph/9403309

Chiral Morphing

Ngee Pong Chang

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Abstract

Chiral symmetry undergoes a metamorphosis at $T_c$. For $T < T_c$, the usual Noether charge, $\Qa$, is dynamically broken by the vacuum. Above $T_c$, chiral symmetry undergoes a subtle change, and the Noether charge \underline{\em morphs} into $\Qbeta$, with the thermal vacuum now becoming invariant under $\Qbeta$. This vacuum is however not invariant under the old $\Qa$ transformations. As a result, the pion remains strictly massless at high $T$. The pion propagates in the early universe with a halo. New order parameters are proposed to probe the structure of the new thermal vacuum.

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Ngee Pong Chang. 1994-03-28. Chiral Morphing. https://arxiv.org/abs/hep-ph/9403309

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