L. Widhalm, for the Belle Collaboration
Published 2006-04-27, updated 2006-07-13Version 3
Using a 282 1/fb data sample collected by the Belle experiment at the KEKB e+e- collider, we study D0 decays to K-l+nu and pi-l+nu final states. 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 q^2 = (p_l+p_nu)^2. Normalizing to the total number of D0 tags, we measure the absolute branching fractions to be B(D0 -> Klnu) =(3.45 +- 0.07stat +- 0.20syst)% and B(D0 -> pilnu) = (0.255 +- 0.019stat +- 0.016syst)% and the semi-leptonic form factors (within the modified pole model) f+^K(0) = 0.695 +- 0.007stat +- 0.022syst and f+^pi(0) = 0.624 +- 0.020stat +- 0.030syst.
Comments: 9 pages, 2 figures, submitted to Phys. Rev. Lett
Journal: Phys.Rev.Lett.97:061804,2006
Measurements of Absolute Branching Fractions for Exclusive $D^0$ Semileptonic Decays
Measurement of the absolute branching fractions for purely leptonic $D_s^+$ decays
Measurement of the Absolute Branching Fractions for $D^-_s\!\rightarrow\!\ell^-\barĪ½_{\ell}$ and Extraction of the Decay Constant $f_{D_s}$
