Download or read book Observation of the Baryonic Flavor-Changing Neutral Current Decay [Lambda]b0 → [Lambda]μ+μ-. written by and published by . This book was released on 2011 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report the first observation of the baryonic flavor-changing neutral current decay [Lambda]b0 → [Lambda]μ+μ- with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a pp̄ collisions data sample corresponding to 6.8 fb-1 at √s = 1.96 TeV collected by the CDF II detector at the Tevatron collider. The total and differential branching ratios for [Lambda]b0 → [Lambda]μ+μ- are measured. They find [Beta]([Lambda]b0 → [Lambda]μ+μ-) = [1.73 ± 0.42(stat) ± 0.55(syst)] x 10-6. They also report the first measurement of the differential branching ratio of Bs0→[phi]μ+μ- using 49 signal events. In addition, they report branching ratios for B+→K+μ+μ-, B0→K0μ+μ- and [Beta]→ K*(892)μ+μ- decays.