# Measurement of the CKM matrix element $\mid V_{ub}\mid$ with charmless exclusive semileptonic $B$ meson decays at BABAR

Abstract : We present a preliminary measurement of the branching fraction for B to rho e nu and of the CKM matrix element |Vub| using approximately 55 million B Bbar meson pairs collected with the BABAR detector. Using isospin relations for several modes we find BF(B0 to rho- e+ nu) = (3.39+-0.44+-0.52+-0.60)x10^(-4) and |Vub| = (3.69+-0.23+-0.27+0.40-0.59)x10^(-3). The quoted errors are statistical, systematic, and theoretical, respectively. These results are obtained by using five different form-factor calculations.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00011817
Contributor : Hélène Kerec <>
Submitted on : Thursday, August 1, 2002 - 4:19:24 PM
Last modification on : Wednesday, January 6, 2021 - 6:22:02 PM

### Citation

B. Aubert, D. Boutigny, J.M. Gaillard, A. Hicheur, Y. Karyotakis, et al.. Measurement of the CKM matrix element $\mid V_{ub}\mid$ with charmless exclusive semileptonic $B$ meson decays at BABAR. International Conference on High Energy Physics ICHEP 2002, Jul 2002, Amsterdam, Netherlands. pp.1-19. ⟨in2p3-00011817⟩

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