Search for the decay B+ → K+ νν̄

Journal article

We search for the rare flavor-changing neutral-current decay B+ → K+ νν̄ in a data sample of 82 fb-1 collected with the BABAR detector at the PEP-II S-factory. Signal events are selected by examining the properties of the system recoiling against either a reconstructed hadronic or semileptonic charged-B decay. Using these two independent samples we obtain a combined limit of ℬ(B+ →K+ νν̄) ≤ 5.2 × 10-5 at the 90% confidence level In addition, by selecting for pions rather than kaons, we obtain a limit of ℬ(B+ → π+ νν̄) < 1.0 × 10-4 using only the hadronic B reconstruction method. © 2005 The American Physical Society.

Authors: Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, J

• Journal: Physical Review Letters
• Volume: 94
• Issue: 10
• Publication date: 2005-03-18
• DOI: 10.1103/PhysRevLett.94.101801
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English