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Gamow-Teller (GT) states in N=Z nuclei with the mass number A from 48 to 64are studied by using Hartree-Fock-Bogoliubov + quasi-particle random phaseapproximation (HFB+QRPA) with Skyrme interactions. The isoscalar spin-triplet(T=0,S=1) pairing interaction is taken into account in QRPA calculations. It isfound in the context of SU(4) symmetry in the spin-isospin space that the GTstrength of lower energy excitations is largely enhanced by the T=0 pairinginteraction which works cooperatively with the T=1 pairing interaction in theground state. A two-peaked structure observed recently in $(p,n)$ reaction on$^{56}$Ni can be considered as a manifestation of the role of T=0 pairing inthe GT collective states.

Role of T=0 pairing in Gamow-Teller states in N=Z nuclei