Weak angle from Kaluza-Klein theory with deformed internal space
We study a seven-dimensional Kaluza-Klein theory with a three-dimensional Taub space as internal manifold. The electroweak coupling constant ratio is shown to be relatable to the deformation parameter α (shape) of the internal space. The full deformation range yields a weak angle in the range 0.25
B. L. Hu, and T. C. Shen, "Weak angle from Kaluza-Klein theory with deformed internal space," Phys. Lett. 178B, 373 (1986).