Measurement of the CKM Matrix Element |Vub| with B -> rho e ny Decays at BABAR

The branching fraction for B -> rho e nu decays and the CKM matrix element |Vub| is measured with semileptonic exclusive B-meson decays using approximately 55 million Upsilon(4S) -> BBbar decays collected during the years 2000 and 2001 with the BABAR detector. The result is Br(B0 -> rho- e+ nu) = (3.39 +- 0.44 +- 0.52 +- 0.60) x 10^-4, and |Vub| = (3.69 +- 0.23 +- 0.27 +0.40-0.59) x 10^-3. The quoted errors are statistical, systematic, and theoretical respectively. These are combined results obtained using five different form-factor models. Individual results are also quoted.

Level thesis:degree_level

thesis.doctoral

Grantor dc:publisher

Technische Universität Dresden

Year

2002

Author dc:creator

• Wilden, Leif

Contributors dc:contributor

• Schubert, Klaus R.
• Spaan, Bernhard
• Muheim, Franz

• CKM Matrix
• Standardmodell
• Vub
• semileptonische Zerfälle
• semileptonic decays
• standard model