Two-colour QCD at non-zero quark-number density

Details Two-colour QCD at non-zero quark-number density Two-colour QCD at non-zero quark-number density

2001-05-23

arxiv.org/abs/hep-lat/0105026v1

Phys.Rev. D64 (2001) 094505

Physics

High Energy Physics

High Energy Physics - Lattice

22 pages RevTeX, 6 figures in 10 postscript files

Scientific paper

10.1103/PhysRevD.64.094505

We have simulated two-colour four-flavour QCD at non-zero chemical potential $\mu$ for quark number. Simulations were performed on $8^4$ and $12^3 \times 24$ lattices. Clear evidence was seen for the formation of a colourless diquark condensate which breaks quark number spontaneously, for $\mu > \mu_c \sim m_\pi/2$. The transition appears to be second order. We have measured the spectrum of scalar and pseudoscalar bosons which shows clear evidence for the expected Goldstone boson. Our results are in qualitative agreement with those from effective Lagrangians for the potential Goldstone excitations of this theory.

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