Download or read book Observation of the Baryonic Flavor-Changing Neutral Current Decay $\Lambda_b0̂ \to \Lambda \mu+̂ \mu-̂$ written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report the first observation of the baryonic flavor-changing neutral current decay?{sub b}° →???− with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a p{bar p} 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?{sub b}° →??+?− are measured. They find?(?{sub b}° →??+?−) = [1.73 ± 0.42(stat) ± 0.55(syst)] x 10−6. They also report the first measurement of the differential branching ratio of B{sub s}° →??+?− using 49 signal events. In addition, they report branching ratios for B+ → K+?+?−, B° → K°?+?− and B → K*(892)?+?− decays.