7,488 research outputs found
The CFL phase and m_s: An effective field theory approach
We study the phase diagram of dense quark matter with an emphasis on the role
of the strange quark mass. Our approach is based on two effective field
theories (EFTs). The first is an EFT that describes quark quasi-particles near
the Fermi surface. This EFT is valid at energies small compared to the chemical
potential. The second is an EFT for the Goldstone modes in the paired phase. We
find that in response to a non-zero strange quark mass the CFL phase first
undergoes a transition to a kaon condensed phase, and then to a gapless phase
with a non-zero Goldstone boson current.Comment: 26 pages, to appear in ``Pairing in fermionic systems: Basic concepts
and modern applications", Series on Advances in Quantum Many-Body Theory,
Vol. 8, World Scientific Publishing, Singapor
Instantons and the Large N_c Limit of QCD
We summarize our current understanding of instantons in the large N_c limit
of QCD. We also present some recent results from simulations of the instanton
liquid in QCD for N_c>3.Comment: 10 pages; talk given at the Workshop on the Phenomenology of Large
N_C QCD, ASU (Jan. 2002), to be published in the proceeding
Strange Goings on in Quark Matter
We review recent work on how the superfluid state of three flavor quark
matter is affected by non-zero quark masses and chemical potentials.Comment: 7 pages. To appear in the proceedings of 6th Workshop on
Non-Perturbative QCD, Paris, France, 5-9 Jun 200
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