Form Factors and Absolute Branching Fractions for D0 → K(π)ℓν
Abstract
We present a study of D0 decaying to K-ℓ+ν and π-ℓ+ν final states using a 282 fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider. The D0 flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q2 = (pℓ + pν)2. Normalizing to the total number of D0 tags, we measure the absolute branching fractions to be {B}(D0 -> K l ν ) = (3.45± 0.07 stat± 0.20 syst)% and {B}(D0 -> π l ν ) = (0.255± 0.019 stat± 0.016 syst)% and the semi-leptonic form factors (within the modified pole model) f+K(0) = 0.695± 0.007 stat± 0.022 syst and f+π (0) = 0.624± 0.020 stat ± 0.030 syst.
- Publication:
-
International Journal of Modern Physics A
- Pub Date:
- 2006
- DOI:
- 10.1142/S0217751X06034598
- Bibcode:
- 2006IJMPA..21.5449W
- Keywords:
-
- 13.20.Fc;
- 14.40.Lb;
- 13.66.Bc;
- Decays of charmed mesons;
- Charmed mesons;
- Hadron production in e<sup>-</sup>e<sup>+</sup> interactions