EPJ

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EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 29, 265-270 (2003)
DOI: 10.1140/epjc/s2003-01227-0

Fourth generation effects in processes induced by the $b \rightarrow s$ transition

T.M. Aliev1, A. Özpineci2 and M. Savci1

1  Physics Department, Middle East Technical University, 06531 Ankara, Turkey
2  The Abdus Salam International Center for Theoretical Physics, 34100, Trieste, Italy

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(Received: 3 April 2003 / Published online: 2 June 2003)

Abstract
We study the effects of sequential fourth quark generation in rare $B \rightarrow K(K^\ast) \ell^+ \ell^-$ decays induced by the $b \rightarrow s$ transition and in Bs0- $ \bar{B}_s^0$ mixing. Using the experimental values on the branching ratios of the $B \rightarrow X_s \gamma$ and $B \rightarrow K(K^\ast) \ell^+ \ell^-$ decays, the allowed regions for $\left\vert V_{tb} V_{ts}^\ast\right\vert$ and $\left\vert V_{t^\prime b} V_{t^\prime s}^\ast\right\vert$ are determined as a function of the $t^\prime$ quark mass.



© Società Italiana di Fisica, Springer-Verlag 2003

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