Consideramos cambios de sabor en modelos 331 en la diferencia de masa P - P con P = (K,D,B,Bs), además los decaimientos B ! Kl+l-, B ! µ+µ- y Bs ! µ+µ-.
An interesting extension of the Standard Model is based on the electroweak gauge group SU(3)L × U(1). We consider flavor-changing neutral currents in these models, concentrating on the P - P mass diference, where P = (K,D,B,Bs), as well as B ! Kl+l-, B ! µ+µ- and Bs ! µ+µ- decays. We nd that the strongest bounds come from the B - B and Bs - Bs mass dierence.
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