Measurement of bar{B0} Meson Properties Via Partial Reconstruction of the Decay bar{B0} -> D*+ l- ar{nu}
Using data recorded by the CLEO II detector operating at the Upsilon(4S) resonance at the Cornell Electron Storage Ring, several properties of B mesons are measured using a partially reconstructed tag of the decay mode bar{B0} -> D*+ l- bar{nu}. Using 2.38 fb**{-1} of on-resonance data and the av...
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| Format: | Others |
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Virginia Tech
2014
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| Online Access: | http://hdl.handle.net/10919/38697 http://scholar.lib.vt.edu/theses/available/etd-070699-205010/ |
| Summary: | Using data recorded by the CLEO II detector operating at the
Upsilon(4S) resonance at the Cornell Electron Storage Ring,
several properties of B mesons are measured using a partially
reconstructed tag of the decay mode bar{B0} ->
D*+ l- bar{nu}. Using 2.38 fb**{-1} of on-resonance
data and the averaged B meson semileptonic branching fraction
through inclusive lepton momentum spectrum obtained by previous
CLEO analysis, we measure the B0 and B- semileptonic
branching fraction to be (10.78 +/- 0.60 +/- 0.69)% and
(10.25 +/- 0.57 +/- 0.65)% respectively, which yields the
lifetime ratio tau_+/tau_0 = 0.950 +0.117-0.080 +0.091-0.068,
assuming the equality of semileptonic partial branching width for
bar{B0} and B-. With a larger dataset of 3.1 fb**{-1}, we measured
the B0-bar{B0} mixing parameter chi_d to be 0.189 +/- 0.019 +/- 0.006. === Ph. D. |
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