Yukawa Textures, New Physics and Nondecoupling

Details Yukawa Textures, New Physics and Nondecoupling Yukawa Textures, New Physics and Nondecoupling

2006-12-20

arxiv.org/abs/hep-ph/0612252v1

Phys.Rev.D76:033008,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, no figures

Scientific paper

10.1103/PhysRevD.76.033008

We point out that New Physics can play an important r\^ ole in rescuing some of the Yukawa texture zero ans\" atze which would otherwise be eliminated by the recent, more precise measurements of $V_{CKM}$. As an example, a detailed analysis of a four texture zero ansatz is presented, showing how the presence of an isosinglet vector-like quark which mixes with standard quarks, can render viable this Yukawa texture. The crucial point is the nondecoupling of the effects of the isosinglet quark, even for arbitrary large values of its mass.

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