Bs Lifetime Difference Measurements from the Tevatron

The two collider experiments at the Tevatron, CDF and DØ, have made a lot of progress in Bs lifetime difference measurements. Here, we have included 3 different channels of measurements, namely, Bs→J/ψ+ϕ, Bs→K+K− and . Combining all the available measurements, we have obtained and ps. ΔΓs is now 2.3 σ away from zero.