On the flavor structure of the littlest Higgs model

Understand

We investigate the Yukawa sector for up-like quarks in the Lee's version of the Littlest Higgs model.

• We derive general quark mass and mixing formulae and study leading order contributions due to non-zero light quark masses.
• Relying on the unitarity of the generalized quark mixing matrix we obtain corrections to the CKM matrix elements.
• In this model FCNCs appear at the tree level and using leading order contributions we obtain the FCNC couplings for the up-like quark transitions.