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24 April 2024

» arxiv » 1112.2884

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First Measurement of the Form Factors in the Decays D0 to rho- e+ nu_e and D+ to rho0 e+ nu_e
CLEO Collaboration ; S. Dobbs ; Z. Metreveli ; K. K. Seth ; A. Tomaradze ; T. Xiao ; L. Martin ; A. Powell ; G. Wilkinson ; H. Mendez ; J. Y. Ge ; G. S. Huang ; D. H. Miller ; V. Pavlunin ; I. P. J. Shipsey ; B. Xin ; G. S. Adams ; D. Hu ; B. Moziak ; J. Napolitano ; K. M. Ecklund ; J. Insler ; H. Muramatsu ; C. S. Park ; L. J. Pearson ; E. H. Thorndike ; S. Ricciardi ; C. Thomas ; M. Artuso ; S. Blusk ; R. Mountain ; T. Skwarnicki ; S. Stone ; L. M. Zhang ; G. Bonvicini ; D. Cinabro ; A. Lincoln ; M. J. Smith ; P. Zhou ; J. Zhu ; P. Naik ; J. Rademacker ; D. M. Asner ; K. W. Edwards ; K. Randrianarivony ; G. Tatishvili ; R. A. Briere ; H. Vogel ; P. U. E. Onyisi ; J. L. Rosner ; J. P. Alexander ; D. G. Cassel ; S. Das ; R. Ehrlich ; L. Gibbons ; S. W. Gray ; D. L. Hartill ; B. K. Heltsley ; D. L. Kreinick ; V. E. Kuznetsov ; J. R. Patterson ; D. Peterson ; D. Riley ; A. Ryd ; A. J. Sadoff ; X. Shi ; W. M. Sun ; J. Yelton ; P. Rubin ; N. Lowrey ; S. Mehrabyan ; M. Selen ; J. Wiss ; J. Libby ; M. Kornicer ; R. E. Mitchell ; C. M. Tarbert ; D. Besson ; T. K. Pedlar ; D. Cronin-Hennessy ; J. Hietala ;
Date:	13 Dec 2011
Abstract:	Using the entire CLEO-c psi(3770) to DDbar event sample, corresponding to an integrated luminosity of 818 pb^-1 and approximately 5.4 x 10^6 DDbar events, we measure the form factors for the decays D0 to rho- e+ nu_e and D+ to rho0 e+ nu_e for the first time and the branching fractions with improved precision. A four-dimensional unbinned maximum likelihood fit determines the form factor ratios to be: V(0)/A_1(0) = 1.48 +- 0.15 +- 0.05 and A_2(0)/A_1(0)= 0.83 +- 0.11 +- 0.04. Assuming CKM unitarity, the known D meson lifetimes and our measured branching fractions we obtain the form factor normalizations A_1(0), A_2(0), and V(0). We also present a measurement of the branching fraction for D^+ to omega e^+ nu_e with improved precision.
Source:	arXiv, 1112.2884
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