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| Paper IPM / Physic / 8584 |
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| Abstract: | |||||
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This study investigates the influence of the fourth generation
quarks on the double lepton polarizations in Λb \rar Λl+ l− decay. Taking |V∗t′sVt′b| ∼ {0.01−0.03} with phase {60°−90°}. We obtain a
constrain on the mass of 4th generation top like quark t′, which
is consistent with the b→ sl+l− rate . With the above
mentioned parameters, we show that the double lepton(μ, τ)
polarizations are quite sensitive to the existence of fourth
generation. It can serve as a good tool to search for new physics
effects, precisely, to search for the fourth generation
quarks(t′, b′) via its indirect manifestations in loop diagrams.
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