D8

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Abstract

We present a unified geometric model of Standard Model fields within a compact three-complex-dimensional Clifford Algebra fiber over 4D spacetime.

Fiber Algebra

We ascribe the fiber a Hermitian metric hmnˉh_{m\bar{n}} and require the standard Clifford rules apply:

αmαn+αnαm=0αmαn+αnαm=hmnˉ,m,n1,2,3\begin{equation} \begin{aligned} \alpha_m \alpha_n + \alpha_n \alpha_m &= 0 \\ \alpha_m \alpha^{\dagger}_n + \alpha^{\dagger}_n \alpha_m &= h_{m\bar{n}}, \quad m, n \in {1,2,3} \end{aligned} \end{equation}

Rotors in the fiber are rotations between the different α\alpha generators that preserve the complex structure. These rotors make up the actions of a U(3)U(3) symmetry. We can therefor construct the generators of the U(3)U(3) symmetry:

λ112([α2,α3]+[α3,α2])λ2i2([α2,α3][α3,α2])λ312([α3,α3][α2,α2])λ412([α1,α3]+[α3,α1])λ5i2([α1,α3][α3,α1])λ612([α1,α2]+[α2,α1])λ7i2([α1,α2][α2,α1])λ8123([α3,α3]+[α2,α2]2[α1,α1])YR13([α3,α3]+[α2,α2]+[α1,α1])\begin{equation} \begin{aligned} \lambda_1 &\equiv \tfrac{1}{2} \left( [\alpha_2, \alpha^{\dagger}_3] + [\alpha_3, \alpha^{\dagger}_2] \right) \\ \lambda_2 &\equiv \tfrac{i}{2} \left( [\alpha_2, \alpha^{\dagger}_3] - [\alpha_3, \alpha^{\dagger}_2] \right) \\ \lambda_3 &\equiv \tfrac{1}{2} \left( [\alpha_3, \alpha^{\dagger}_3] - [\alpha_2, \alpha^{\dagger}_2] \right) \\ \lambda_4 &\equiv \tfrac{1}{2} \left( [\alpha_1, \alpha^{\dagger}_3] + [\alpha_3, \alpha^{\dagger}_1] \right) \\ \lambda_5 &\equiv \tfrac{i}{2} \left( [\alpha_1, \alpha^{\dagger}_3] - [\alpha_3, \alpha^{\dagger}_1] \right) \\ \lambda_6 &\equiv \tfrac{1}{2} \left( [\alpha_1, \alpha^{\dagger}_2] + [\alpha_2, \alpha^{\dagger}_1] \right) \\ \lambda_7 &\equiv \tfrac{i}{2} \left( [\alpha_1, \alpha^{\dagger}_2] - [\alpha_2, \alpha^{\dagger}_1] \right) \\ \lambda_8 &\equiv \tfrac{1}{2\sqrt{3}} \left( [\alpha_3, \alpha^{\dagger}_3] + [\alpha_2, \alpha^{\dagger}_2] - 2[\alpha_1, \alpha^{\dagger}_1] \right) \\ Y_R &\equiv \tfrac{1}{3} \left( [\alpha_3, \alpha^{\dagger}_3] + [\alpha_2, \alpha^{\dagger}_2] + [\alpha_1, \alpha^{\dagger}_1] \right) \end{aligned} \end{equation}

Spacetime Algebra

γμγν+γνγμ=2gμν,μ,ν0,1,2,3\begin{equation} \begin{aligned} \gamma_{\mu} \gamma_{\nu} + \gamma_{\nu} \gamma_{\mu} &= 2g_{\mu\nu}, \quad \mu, \nu \in {0, 1,2,3} \end{aligned} \end{equation}