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

Fermilab E791 Collaboration·E. M. Aitala et al
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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.

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Fermilab E791 Collaboration, E. M. Aitala et al. 1996-11-01. Measurement of the Branching Ratio B(D+ --> rho^0 l nu)/B(D+ --> K*0 l nu). https://doi.org/10.1016/s0370-2693(97)00194-9

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