New Measurements of the Ds to Phi mu nu Form Factor Ratios
Abstract
Using a large sample of Ds to Phi mu nu decays collected by the FOCUS photoproduction experiment at Fermilab, we present new measurements of two semileptonic form factor ratios: rV and r2. We find rV = 1.549 0.250 0.145 and r2 = 0.713 0.202 0.266. These values are consistent with the rV and r2 form factors measured for the process D+ to K*bar mu nu.
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