Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-09-20
Phys.Lett.B633:183-189,2006
Physics
High Energy Physics
High Energy Physics - Experiment
14 pages, 5 figures, and 2 tables. We updated the previous version by changing some words, removing one plot, and adding two t
Scientific paper
10.1016/j.physletb.2005.12.003
Using a large sample of D+ -> K- pi+ mu+ nu decays collected by the FOCUS photoproduction experiment at Fermilab, we present the first measurements of the helicity basis form factors free from the assumption of spectroscopic pole dominance. We also present the first information on the form factor that controls the s-wave interference discussed in a previous paper by the FOCUS collaboration. We find reasonable agreement with the usual assumption of spectroscopic pole dominance and measured form factor ratios.
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