Actions for Leptonic Decays of the Charged B Meson [electronic resource].

Email RIS file
Bookmark
Report an Issue

Leptonic Decays of the Charged B Meson [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2010.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
176 pages : digital, PDF file
Additional Creators
SLAC National Accelerator Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
The authors present a search for the decay B⁺ → ℓ⁺ν{sub ℓ} (ℓ = τ, μ, or e) in (458.9 ± 5.1) x 10⁶ Υ(4S) decays recorded with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed exclusive semi-leptonic B decay (B⁻ → D°ℓ⁻{bar ν}X) is selected, and in the recoil a search for B⁺ → ℓ⁺ν{sub ℓ} signal is performed. The τ is identified in the following channels: τ⁺ → e⁺ν{sub e}{bar ν}{sub τ}, τ⁺ → μ⁺ν{sub μ}{bar ν}{sub τ}, τ⁺ → π⁺{bar ν}{sub τ}, and τ⁺ → π⁺π°{bar ν}{sub τ}. The analysis strategy and the statistical procedure is set up for branching fraction extraction or upper limit determination. They determine from the dataset a preliminary measurement of Β(B⁺ → τ⁺ν{sub τ}) = (1.8 ± 0.8 ± 0.1) x 10⁻⁴, which excludes zero at 2.4σ, and f{sub B} = 255 ± 58 MeV. Combination with the hadronically tagged measurement yields Β(B⁺ → τ⁺ν{sub τ}) = (1.8 ± 0.6) x 10⁻⁴. They also set preliminary limits on the branching fractions at Β(B⁺ → e⁺ν{sub e}) < 7.7 x 10⁻⁶ (90% C.L.), Β(B⁺ → μ⁺ν{sub μ}) < 11 x 10⁻⁶ (90% C.L.), and Β(B⁺ → τ⁺ν{sub τ}) < 3.2 x 10⁻⁴ (90% C.L.).
Report Numbers
E 1.99:slac-r-914
slac-r-914
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
06/11/2010.
"slac-r-914"
Corwin, Luke A.
Funding Information
AC02-76SF00515
View MARC record | catkey: 14677191