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Precision test of a Fermion mass texture

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arxiv hep-ph/0104088 v2 pith:M35HXD2I submitted 2001-04-09 hep-ph

Precision test of a Fermion mass texture

classification hep-ph
keywords textureapproximatequarktestzeroanalysebabarbelle
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Texture zeros in the quark Yukawa matrices generally lead to precise and simple expressions for CKM matrix elements in terms of ratios of quark masses. Using the new data on $b-$decays we test a particularly promising texture zero solution and show that it is at best approximate. We analyse the approximate texture zero structure and show it is consistent with experiment. We investigate the implications for the CKM unitarity triangle, measurements at $BaBar$ and $BELLE$ as well as for the theories which invoke family symmetries.

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