ar X iv : n uc l - th / 0 00 10 36 v 1 1 9 Ja n 20 00 F - spin as a Partial Symmetry
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چکیده
We use the empirical evidence that F-spin multiplets exist in nuclei for only selected states as an indication that F-spin can be regarded as a partial symmetry. We show that there is a class of non-F-scalar IBM-2 Hamiltonians with partial F-spin symmetry, which reproduce the known systematics of collective bands in nuclei. These Hamiltonians predict that the scissors states have good F-spin and form F-spin multiplets, which is supported by the existing data.
منابع مشابه
ar X iv : n uc l - th / 9 31 00 28 v 1 2 1 O ct 1 99 3 An antiproton - proton partial - wave analysis
متن کامل
ar X iv : n uc l - th / 0 50 80 60 v 1 2 9 A ug 2 00 5 Spin observables in p̄p → ΛΛ and density - matrix constraints
The positivity conditions of the spin density matrix constrain the spin observables of the reaction p̄p → ΛΛ, leading to model-independent, non-trivial inequalities. The formalism is briefly presented and examples of inequalities are provided.
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تاریخ انتشار 2000