First measurement of the form factors in the decays D0 → ρ- e+ ν(e) and D+ → ρ0 e+ ν(e)

• Published in: Physical review letters Vol. 110; no. 13; p. 131802
• Main Authors: Dobbs, S, Metreveli, Z, Seth, K K, Tomaradze, A, Xiao, T, Martin, L, Powell, A, Wilkinson, G, Mendez, H, Asner, D M, Tatishvili, G, Ge, J Y, Huang, G S, Miller, D H, Pavlunin, V, Shipsey, I P J, Xin, B, Adams, G S, Hu, D, Moziak, B, Napolitano, J, Ecklund, K M, Insler, J, Muramatsu, H, Park, C S, Pearson, L J, Thorndike, E H, Ricciardi, S, Thomas, C, Artuso, M, Blusk, S, Mountain, R, Skwarnicki, T, Stone, S, Zhang, L M, Bonvicini, G, Cinabro, D, Lincoln, A, Smith, M J, Zhou, P, Zhu, J, Naik, P, Rademacker, J, Edwards, K W, Randrianarivony, K, Briere, R A, Vogel, H, Onyisi, P U E, Rosner, J L, Alexander, J P, Cassel, D G, Das, S, Ehrlich, R, Gibbons, L, Gray, S W, Hartill, D L, Heltsley, B K, Kreinick, D L, Kuznetsov, V E, Patterson, J R, Peterson, D, Riley, D, Ryd, A, Sadoff, A J, Shi, X, Sun, W M, Yelton, J, Rubin, P, Lowrey, N, Mehrabyan, S, Selen, M, Wiss, J, Libby, J, Kornicer, M, Mitchell, R E, Tarbert, C M, Besson, D, Pedlar, T K, Cronin-Hennessy, D, Hietala, J
• Format: Journal Article
• Language: English
• Published: United States 29.03.2013
• ISSN: 1079-7114

The beauty to up quark coupling constant |V(ub)| can be extracted from B → ρ e+ ν(e) combined with the form factors for D → K* e+ ν(e) and B → V ℓ+ ℓ- and D → ρ e+ ν(e). Using the entire CLEO-c ψ(3770) → DD event sample, corresponding to an integrated luminosity of 818  pb(-1) and approximately 5.4×10(6) DD events, we measure the form factors for the decays D0 → ρ- e+ ν(e) and D+ → ρ0 e+ ν(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)/A1(0)=1.48±0.15±0.05 and A2(0)/A1(0)=0.83±0.11±0.04. Assuming Cabibbo-Kobayashi-Maskawa unitarity, the known D meson lifetimes, and our measured branching fractions we obtain the form factor normalizations A1(0), A2(0), and V(0). We also present a measurement of the branching fraction for D+ → ω e+ ν(e) with improved precision.