Abstract
We point out the importance of the Z and box diagram to the decays B→, Kνν¯. The rate for B→ grows rapidly for internal quark masses >100 GeV. With three generations and 25≲≲200 GeV the branching ratio ranges roughly from to . With four generations, this rate could go up another order of magnitude. The mode B→Kνν¯ typically has a higher branching ratio, but is harder to detect experimentally. The rare B decays combined with information from K→πνν¯ studies may provide a test of the symmetry-breaking mechanism of the standard model and/or evidence for a fourth generation.
- Received 12 November 1986
DOI:https://doi.org/10.1103/PhysRevLett.58.1608
©1987 American Physical Society