Measurement of the Branching Fraction of Upsilon(4S) to B0B0bar [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy. Office of Science, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators:: Stanford Linear Accelerator Center, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

The authors report the first measurement of the branching fraction f₀₀ for Υ(4S) → B°{bar B}°. The data sample consists of 81.7 fb⁻¹ collected at the Υ(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy e⁺e⁻ storage ring. Using partial reconstruction of the decay {bar B}° → D*⁺ℓ⁻ {bar ν}{sub t} in which only the charged lepton and the soft pion from the decay D*⁺ → D°π⁺ are reconstructed, they obtain f₀₀ = 0.487 ± 0.010(stat) ± 0.008(sys). The result does not depend on the branching fractions of {bar B}° → D*⁺ℓ⁻ ν{sub t} and D*⁺ → D°π⁺ decays, on the ratio of the charged and neutral B meson lifetimes, nor on the assumption of isospin symmetry.

Report Numbers:

E 1.99:slac-pub-11085
slac-pub-11085

Subject(s):

Particle Accelerators

Other Subject(s):

Note:

Published through SciTech Connect.
04/04/2005.
"slac-pub-11085"
Aubert, B.

Type of Report and Period Covered Note:

Topical;

Funding Information:

AC02-76SF00515

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