Year: 2012
Type: article
Abstract: We argue that a so far neglected dimensionless scale, the number of neighbors in a closely packed system, is relevant for the convergence of the large-N c expansion at high chemical potential. It is only when the number of colors is large w.r.t. this new scale $$( \sim \mathcal{O}(10))$$ that a convergent large-N c limit is reached. This provides an explanation as to why the large-N c expansion, qualitatively successful in vacuum QCD, fails to describe high baryo-chemical potential systems, such as nuclear matter. It also means that phenomenological claims about high-density matter based on large-N c extrapolations should be treated with caution. This work is based on [1].
Source: Physics of Atomic Nuclei
Authors: G. Torrieri, I. Mishustin
Institutions: Goethe University Frankfurt, Kurchatov Institute
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2092827410