ar X iv : n uc l - th / 9 80 20 31 v 1 1 0 Fe b 19 98 Ground State Correlations and Mean Field Using the exp ( S ) Method .

ar X iv : n uc l - th / 9 80 20 74 v 1 2 4 Fe b 19 98 Partial U A ( 1 ) Restoration from Bose - Einstein Correlations

The effective intercept parameter of the two-pion Bose-Einstein Correlation function, λ * , is found to be sensitive to partial restoration of U A (1) symmetry in ultra-relativistic nuclear collisions. An increase in the yield of the η ′ meson, proposed earlier as a signal of partial U A (1) restoration, is shown to create a " hole " in the low p t region of λ *. A comparison with NA44 data [1]...

ar X iv : h ep - l at / 9 80 20 29 v 1 2 0 Fe b 19 98 DESY 98 - 017 February 2008 ADVANCED LATTICE

ar X iv : n uc l - th / 9 70 20 47 v 1 2 1 Fe b 19 97 Neutron - proton pairing in the BCS approach

We investigate the BCS treatment of neutron-proton pairing involving timereversed orbits. We conclude that an isospin-symmetric hamiltonian, treated with the help of the generalized Bogolyubov transformation, fails to describe the ground state pairing properties correctly. In order for the np isovector pairs to coexist with the like-particle pairs, one has to break the isospin symmetry of the h...

ar X iv : n uc l - ex / 0 20 20 25 v 1 2 7 Fe b 20 02 A tentative 4 − isomeric state in 98 Sr

ar X iv : n uc l - th / 9 80 60 97 v 1 2 9 Ju n 19 98 3 P 2 - 3 F 2 pairing in neutron matter with modern nucleon - nucleon potentials