Constraining models with vector-like fermions from FCNC in K and B physics
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Constraining models with vector-like fermions from FCNC in K and B physics

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Constraining models with vector-like fermions from FCNC in K and B physics

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Barenboim Szuchman, Gabriela Alejandra Perfil; Botella Olcina, Francisco J.; Vives García, Óscar
Aquest document és un/a article, creat/da en: 2001
In this work we update the constraints on tree level FCNC couplings in the framework of a theory with n isosinglet vector-like down quarks. In this context, we emphasize the sensitivity of the B J/psi K-S CP asymmetry to the presence of new vector-like down quarks. This CP asymmetry, together with the rare decays B --> X(s,d)l (l) over bar and K --> pi nu<(<nu>)over bar> are the best options to further constrain the FCNC tree level couplings or even to point out, in the near future, the possible presence of vector-like quarks in the low energy spectrum, as suggested by GUT theories or models of large extra dimensions at the TeV scale.

    Barenboim Szuchman, Gabriela Alejandra Botella Olcina, Francisco J. Vives García, Óscar 2001 Constraining models with vector-like fermions from FCNC in K and B physics Nuclear Physics B 613 1-2 285 305
http://dx.doi.org/10.1016/S0550-3213(01)00390-X
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