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标题：The Hadronic Spectrum of 2-colour QCD at Non-zero Chemical Potential
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作者：P. Sitch ; S. Hands ; J.I. Skullerud 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The hadron spectrum of SU(2) lattice gauge theory with two avours of Wilson quark is studied on an 8316 lattice using all-to-all propagators, with particular emphasis on the dependence on quark chemical potential m. As m is increased from zero the diquark states with non-zero baryon number B respond as expected, while states with B = 0 remain unaffected until the onset of nonzero baryon density at m = Mp =2. Post onset the pi-meson becomes heavier in accordance with chiral perturbation theory while the rho becomes lighter. In the diquark sector a Goldstone state associated with a superuid ground state can be identied. A further consequence of superuidity is an approximate degeneracy between mesons and baryons with the same spacetime and isospin quantum numbers.