Download or read book Study of the Rare Decay KL {u2192} ?0?? at KTeV. written by and published by . This book was released on 2007 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors study on the rare decay KL → ?0??, measure aV, and branching ratio by analyzing 96, 97 and 99 data. The measurements were taken by KTeV at Fermi National Accelerator Laboratory. After all cuts, they have 1982 KL → ?0?? candidate. The background level is estimated as 30%. KL → ?0?? branching ratio is measured as (1.29 ± 0.03(stat) ± 0.04(sys)) x 10-6. By using D'Ambrosio's theory to fit aV, aV = -(-0.31 ± 0.05(stat) ± 0.07(sys)).