Measurement of the Branching Ratio B(D+ --> rho^0 l nu)/B(D+ --> K*0 l nu)

Abstract

We report a measurement of the branching ratio B(D+-->rho^0 l nu)/ B(D+-->K*0 l nu) from the Fermilab charm hadroproduction experiment E791. Based on signals of 49+-17 events in the D+--> rho^0 e nu mode and 54+-18 events in the D+--> rho^0 mu nu mode, we measure B(D+-->rho^0 e nu)/B(D+-->K*0 e nu) = 0.045+-0.014+-0.009, and B(D+-->rho^0 mu nu)/B(D+-->K*0 mu nu) = 0.051+-0.015+-0.009. Combining the results from both the electronic and muonic modes, we obtain B(D+-->rho^0 l nu)/B(D+-->K*0 l nu) = 0.047+-0.013. This result is compared to theoretical predictions.

arXiv comment15 pages, Latex, including two figures, submitted to Physics Letters B

References in corpus (11)

• Semileptonic Meson Decays in the Quark Model: An Update
• Leptonic and Semileptonic Decays of Charm and Bottom Hadrons
• Effective Lagrangian for Heavy and Light Mesons: Semileptonic Decays
• The Semileptonic Decays $D\to \pi (\rho )e\nu$ and $B\to \pi (\rho )e\nu$ from QCD Sum Rules
• Semi-leptonic Decays of Heavy Flavours on a Fine Grained Lattice
• Lattice Calculation of D- and B-meson Semileptonic Decays, using the Clover Action at beta=6.0 on APE
• An ``Improved" Lattice Study of Semi-leptonic Decays of D-Mesons
• The E791 Parallel Architecture Data Acquisition System
• An effective model for charmed meson semileptonic decays
• Measurements of the Ratios $\mathcal{B}(D_s^{+}\to \eta {\ell }^{+}\nu )/\mathcal{B}(D_s^{+}\to \varphi {\ell }^{+}\nu )$ and $\mathcal{B}(D_s^{+}\to {\eta }^{\prime }{\ell }^{+}\nu )/\mathcal{B}(D_s^{+}\to \varphi {\ell }^{+}\nu )$
• Observation of D+ -> rho0(770) mu+ nu

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