Bₛ - Bₛ mixing in the MSSM scenario with large flavor mixing in the LL/RR sector

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We show that the recent measurements of Bₛ-Bₛ mass difference, Δmₛ, by DØ and CDF collaborations give very strong constraints on MSSM scenario with large flavor mixing in the LL and/or RR sector of down-type squark mass squared matrix. In particular, the region with large mixing angle and large mass difference between scalar strange and scalar bottom is ruled out by giving too large Δmₛ. The allowed region is sensitive to the CP violating phases δₗ₍ᵣ₎. The Δmₛ constraint is most stringent on the scenario with both LL and RR mixing. We also predict the time-dependent CP asymmetry in Bₛ → ψϕ decay and semileptonic asymmetry in Bₛ→ ℓ X decay.