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.
