Search for $B^+ \\to e^+ \\nu$ and $B^+ \\to \\mu^+ \\nu$ decays using hadronic tagging
Journal
Physical Review
Journal Volume
D91
Journal Issue
5
Pages
052016
Date Issued
2014-06
Author(s)
Yook, Y.
Abstract
We present a search for the rare leptonic decays B+ → e+νe and B+ → μ+νμ, using the full Υ(4S) data sample of 772 × 106 B B¯ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. One of the B mesons from the Υ(4S) → B B¯ decay is fully reconstructed in a hadronic mode, while the recoiling side is analyzed for the signal decay. We find no evidence of a signal in any of the decay modes. Upper limits of the corresponding branching fractions are determined as B(B+ → e+νe) < 3.5 × 10-6 and B(B+ → μ+νμ) < 2.7 × 10-6 at 90% confidence level.
Type
journal article