SEARCH FOR B+ → ℓ+νℓ AND B+ → ℓ+νℓγ DECAYS

Details SEARCH FOR B+ → ℓ+νℓ AND B+ → ℓ+νℓγ DECAYS SEARCH FOR B+ → ℓ+νℓ AND B+ → ℓ+νℓγ DECAYS

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf.1217k&link_type=abstract

HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi

Physics

High Energy Physics

Scientific paper

We have searched for the leptonic and radiative leptonic B decays, B+ → τ+ντ, B+ → μ+νμ, B+ → e+νeγ and B+ → μ+νμγ. Using a 140 fb-1 data sample collected with the Belle detector at the KEKB asymmetric e+e- collider, we find no evidence for signals in any mode and set the following preliminary upper limits at 90% confidence level: ℬ(B+ → τ+ντ) < 2.9 × 10-4, ℬ(B+ → μ+νμ) < 2.0 × 10-6, ℬ(B+ → e+νeγ) < 2.2 × 10-5 and ℬ(B+ → μ+νμγ) < 2.3 × 10-5.

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