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Symmetry of leptons

Симметрия лептонов

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Acta Physica Academiae Scientiarum Hungaricae

Abstract

By assuming that (v e, e) and (μ+, νμ) belong to the spinor representations θ1/2, 0 and θ0, 1/2 of the rotation group of SU(2)×SU(2), the selection rules for isospin τ and hypercharge s pin ζ are formulated for the pure leptonic processes. As a result, self-current processes such as

$$\nu _e \left( {\tilde \nu _e } \right) + e^ - \to \nu _e \left( {\tilde \nu _e } \right) + e^ - $$

belong to the allowed transition, while μ—e exchange processes such as

$$\mu ^ \pm \to e^ \pm + \nu _e \left( {\tilde \nu _e } \right) + \nu _\mu \left( {\tilde \nu _\mu } \right)$$

belong to the forbidden transition.

Leptonic bosons are introduced which are responsible for the mediation of the pure leptonic processes, and their masses and coupling constants are inferred:M L≅130 BeV∼200 BeV,

$$\frac{{G_L^2 }}{{4\pi }} \cong 1 \cdot 10^{ - 1} $$

,

$$\frac{{F_L^2 }}{{4\pi }} \cong 1 \cdot 10^{ - 3} $$

.

Резюме

Сформулированы правила отбора для изоспина и гиперзарядового спина з для чисто лептонных процессов при предположении, что (μ+, νμ) и (v e, e) принадлежат к спинорным представлениям θ1/2,0 и θ0, 1/2 групп вращения SU(2)×SU(2). Из них следует, что в то время как процессы обмена μ-e, такие как

$$\nu _e \left( {\tilde \nu _e } \right) + e^ - \to \nu _e \left( {\tilde \nu _e } \right) + e^ - $$

принадлежат к запрещенным переходам, процессы с μ-e собственным током, такие как

$$\mu ^ \pm \to e^ \pm + \nu _e \left( {\tilde \nu _e } \right) + \nu _\mu \left( {\tilde \nu _\mu } \right)$$

принадлежат к разрешенным переходам.

Введены лептонные бозоны, благодаря которым происходит передача чисто лептонных процессов, определены их массы и коэффициенты связи.M L≅130 BeV ∼200 BeV,

$$\frac{{G_L^2 }}{{4\pi }} \cong 1 \cdot 10^{ - 1} $$

,

$$\frac{{F_L^2 }}{{4\pi }} \cong 1 \cdot 10^{ - 3} $$

.

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Nakamura, S., Sato, S. Symmetry of leptons. Acta Physica 31, 193–213 (1972). https://doi.org/10.1007/BF03156841

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