Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8194445 | Physics Letters B | 2009 | 5 Pages |
Abstract
The tree-level contributions to the rare decays B+âÏ+νν¯, B+âK+νν¯, and B+âK*+νν¯ are analyzed and compared to those occurring in K+âÏ+νν¯, D+âÏ+νν¯, and Ds+âÏ+νν¯. It is shown that these purely long-distance contributions, arising from the exchange of a charged lepton, can be significant in B+ decays for an intermediate Ï, potentially blurring the distinction between the modes used to extract B+âÏ+Î½Ï and those used to probe the genuine short-distance bâdνν¯ and bâsνν¯ FCNC transitions. Numerically, the tree-level contributions are found to account for 98%, 12% and 14% of the total B+âÏ+νν¯, B+âK+νν¯, and B+âK*+νν¯ rates, respectively.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Jernej F. Kamenik, Christopher Smith,