XXXV Workshop on Geometric Methods in Physics | 26.06-2.07.2016 |

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## Goce Chadzitaskos## The Shmushkevich method for higher symmetry groupsThe basic idea of Shmushkevich is “isotopic non-polarization” of the states before the interaction and after it. Hence his underlying Lie group was SU(2). We extend this idea to any simple Lie group. This paper determines the relative probabilities of various channels of scattering and decay processes following from the invariance of the interactions with respect to a compact simple a Lie group. Aiming at the probabilities rather than at the Clebsch-Gordan coefficients makes the task easier, and simultaneous consideration of all possible channels for given multiplets involved in the process, makes the task possible. The probability of states with multiplicities greater than 1 is averaged over. Examples with symmetry groups O(5), F(4), and E(8) are shown. The talk is based on joint work with M. Bodner, J. Patera, A. Tereszkiewicz. |

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