Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-02-26
Physics
Nuclear Physics
Nuclear Theory
Lecture note, latex, 55 pages, 7 figures; typos corrected
Scientific paper
This note is based on four lectures that I gave at the 10th Taiwan Nuclear Spring School held at Hualien, Taiwan in January 2002. It aims to correlate the old notion of Cheshire Cat Principle developed for elementary baryons to the modern notion of quark-baryon and gluon-meson "continuities" or "dualities" in dilute and dense many-body systems and predict what would happen to mesons when squeezed by nuclear matter to high density as possibly realized in compact stars. Using color-flavor locking in QCD, the vector mesons observed at low density can be described as the Higgsed gluons dressed by cloud of collective modes, i.e., pions just as they are in superdense matter, thus showing the equivalence between hidden $flavor$ gauge symmetry and explicit $color$ gauge symmetry. Instead of going into details of well-established facts, I focus on a variety of novel ideas -- some solid and some less -- that could be confirmed or ruled out in the near future.
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