Phys. Rev. D 75, 085012 (2007) [25 pages]
Gluonic phases, vector condensates, and exotic hadrons in dense QCD
Abstract
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Citing Articles
E. V. Gorbar, 1 Michio Hashimoto, 2 and V. A. Miransky31Bogolyubov Institute for Theoretical Physics, 03143, Kiev, Ukraine
2Department of Physics, Nagoya University, Nagoya, 464-8602, Japan
3Department of Applied Mathematics, University of Western Ontario, London, Ontario N6A 5B7, Canada and Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
Received 28 January 2007; published 18 April 2007
We study the dynamics in phases with vector condensates of gluons (gluonic phases) in dense two-flavor quark matter. These phases yield an example of dynamics in which the Higgs mechanism is provided by condensates of gauge (or gauge plus scalar) fields. Because vacuum expectation values of spatial components of vector fields break the rotational symmetry, it is natural to have a spontaneous breakdown both of external and internal symmetries in this case. In particular, by using the Ginzburg-Landau approach, we establish the existence of a gluonic phase with both the rotational symmetry and the electromagnetic U(1) being spontaneously broken. In other words, this phase describes an anisotropic medium in which the color and electric superconductivities coexist. It is shown that this phase corresponds to a minimum of the Ginzburg-Landau potential and, unlike the two-flavor superconducting (2SC) phase, it does not suffer from the chromomagnetic instability. The dual (confinement) description of its dynamics is developed and it is shown that there are light exotic vector hadrons in the spectrum, some of which condense. Because most of the initial symmetries in this system are spontaneously broken, its dynamics is very rich.
©2007 The American Physical Society
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