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arxiv: 1003.0310 · v3 · pith:Q55D3OD2new · submitted 2010-03-01 · ✦ hep-ph · gr-qc· hep-ex

Unitarity Boomerang

classification ✦ hep-ph gr-qchep-ex
keywords fourparametersthreeunitarityboomerangdisplayspresentationalternative
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For the three family quark flavor mixing, the best parametrization is the original Kobayashi-Maskawa matrix, $V_{KM}$, with four real parameters: three rotation angles $\theta_{1,2,3}$ and one phase $\delta$. A popular way of presentation is by the unitarity triangle which, however, explicitly displays only three, not four, independent parameters. Here we propose an alternative presentation which displays simultaneously all four parameters: the unitarity boomerang.

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  1. Rephasing invariant structure of CP phase for simplified mixing matrices in Fritzsch--Xing parametrization

    hep-ph 2026-02 unverdicted novelty 5.0

    Under the approximations U13^e = 0 and U23^e = 0, the Fritzsch-Xing CP phase equals the sum of the neutrino-intrinsic phase and the relative phase between the first two generations.