Pion-pion phase shift and K2π decay |
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| Authors: | P. Pascual F.J. Yndurain |
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| Affiliation: | Departamento de Fisica Teorica, Universidad de Barcelona, Barcelona, Spain;Departamento de Fisica Teorica, Universidad Autonoma de Madrid, Canto Blanco, Madrid, Spain |
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| Abstract: | We remark that, using the Cabibbo transformation properties for the weak Hamiltonian we can obtain Δ0 = δ0(0) (s = MK(2) (s = MK2) from the experimental decay rates for Ks → 2π, K+ → π0π+, obtaining δ0 = 58.0° ± 4.6°. This result implies in particular a value of ≈ 0.6 for the S-wave isospin zero scattering length, in accordance with Ke4 results but in violent disagreement with Weinberg's calculation. |
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