The size of image and physics beyond the Standard Model Original Research Article

We analyse the allowed range of values of χ, both in the Standard Model and in models with new physics, pointing out that a relatively large value of χ, e.g., of order λ, is only possible in models where the unitarity of the image Cabibbo–Kobayashi–Maskawa matrix is violated through the introduction of extra image quarks. We study the interesting case where the extra quark is an isosinglet, determining the allowed range for χ and the effect of a large χ on various low-energy observables, such as CP asymmetries in B meson decays. We also discuss the correlated effects which would be observable at high energy colliders, like decays image, modifications of the cross section and forward–backward asymmetry in image and the direct production of a new quark.