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Measurement of D0-->pilnu(Klnu) form factors and absolute branching fractions |
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| Authors: | Widhalm L Abe K Abe K Adachi I Aihara H Arinstein K Asano Y Aushev T Bakich A M Balagura V Barberio E Barbero M Bay A Bedny I Belous K Bitenc U Bizjak I Blyth S Bondar A Bozek A Bracko M Browder T E Chang P Chen A Chen W T Choi Y Chuvikov A Cole S Dalseno J Danilov M Dash M Drutskoy A Eidelman S Gabyshev N Garmash A Gershon T Gokhroo G Golob B Gorisek A Ha H Haba J Hara T Hayasaka K Hayashii H Hazumi M Hokuue T Hoshi Y Hou S Hou W-S Iijima T Ikado K Imoto A Inami K Ishikawa A Itoh R Iwasaki M Iwasaki Y Kakuno H Kang J H Kapusta P Kataoka S U Kawai H Kawasaki T Khan H R Kim H J Kim H O |
| Affiliation: | Institute of High Energy Physics, Vienna, Austria. |
| Abstract: | Using a 282 fb-1 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 q2=(pl+pnu)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 semileptonic 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. |
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