Measurements of the qsq dependence of the D0 to K mu nu and D0 to pi mu nu form factors

Details Measurements of the qsq dependence of the D0 to K mu nu and D0 to pi mu nu form factors Measurements of the qsq dependence of the D0 to K mu nu and D0 to pi mu nu form factors

2004-10-14

arxiv.org/abs/hep-ex/0410037v2

Phys.Lett.B607:233-242,2005

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 6 figures

Scientific paper

10.1016/j.physletb.2004.12.036

Using a large sample of D0 to K mu nu and pi mu nu decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of the q^2 dependence for the f+(q^2) form factor. These measured f+(q^2) form factors are fit to common parameterizations such as the pole dominance form and compared to recent unquenched Lattice QCD calculations. We find m_pole = 1.93+-0.05+-0.03 GeV/c^2 for D0 to K mu nu and m_pole = 1.91+0.30-0.15+-0.07 GeV/c^2 for D0 to pi mu nu and f-^{K}(0)/f+^{K}(0) = -1.7+1.5-1.4+-0.3.

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