Abstract
The form factor ratios rv = V(0)/A1(0), r2 = A2(0)/A1(0) and r3 = A3(0)/A1(0) in the decay D+ → K̄(black star)0ℓ+ νℓ, K̄(black star)0 K- π+ have been measured using data from charm hadroproduction experiment E791 at Fermilab. From 3034 (595) signal (background) events in the muon channel, we obtain rv= 1.84 ± 0.11 ± 0.09, r2 = 0.75 ± 0.08 ± 0.09 and, as a first measurement of r3, we find 0.04 ± 0.33 ± 0.29. The values of the form factor ratios rv and r2 measured for the muon channel are combined with the values of rv and r2 that we have measured in the electron channel. The combined E791 results for the muon and electron channels are rv = 1.87 ± 0.08 ± 0.07 and r2 = 0.73 ± 0.06 ± 0.08.
Original language | English |
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Pages (from-to) | 435-441 |
Number of pages | 7 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 440 |
Issue number | 3-4 |
DOIs | |
State | Published - 19 Nov 1998 |