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Isospin mixing of isospin-projected Slater determinants:
formalism and preliminary applications
M. Rafalski, W. Satula, and J. Dobaczewski
We report on the development of a new theoretical tool that allows for isospin
projection of Slater determinants and we present its
first applications. In particular, we determine
the isospin mixing in ground states of
and discuss its dependence on the size of the harmonic-oscillator basis
used in the calculations.
We also discuss the unphysical contribution
to the isospin mixing caused by the spurious isospin-symmetry breaking
inherent to the mean-field approach. We show that these contributions may
be as large as 30% of the value of the isospin-mixing parameter.