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arXiv · 1010.1152

Fourth generation effect on $Λ_b$ decays

R. Mohanta·A. K. Giri
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Abstract

The rare decays of $Λ_b$ baryon governed by the quark level transitions $ b \to s$, are investigated in the fourth quark generation model popularly known as SM4. Recently it has been shown that SM4, which is a very simple extension of the standard model, can successfully explain several anomalies observed in the CP violation parameters of $B$ and $B_s$ mesons. We find that in this model due to the additional contributions coming from the heavy $t'$ quark in the loop, the branching ratios and other observables in rare $Λ_b$ decays deviate significantly from their SM values. Some of these modes are within the reach of LHCb experiment and search for such channels are strongly argued.

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R. Mohanta, A. K. Giri. 2010-11-18. Fourth generation effect on $Λ_b$ decays. https://doi.org/10.1103/physrevd.82.094022

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