Determination of |Vub| from measurements of the inclusive charmless semileptonic partial rates of B mesons using full reconstruction tags

Bizjak, I.; Abe, K.; Aihara, H.; Asano, Y.; Bahinipati, S.; Bakich, A.M.; Ban, Y.; Barberio, E.; Barbero, M.; Bay, A.; Bitenc, U.; Blyth, S.; Bondar, A.; Bozek, A.; Bračko, M.; Brodzicka, J.; Browder, T.E.; Chao, Y.; Chen, A.; Chen, W.T.; Cheon, B.G.; Chistov, R.; Choi, S.-K.; Choi, Y.; Choi, Y.K.; Chuvikov, A.; Cole, S.; Dalseno, J.; Danilov, M.; Dash, M.; Dong, L.Y.; Drutskoy, A.; Eidelman, S.; Enari, Y.; Fang, F.; Fratina, S.; Gabyshev, N.; Garmash, A.; Gershon, T.; Gokhroo, G.; Golob, B.; Gorišek, A.; Haba, J.; Hara, T.; Hayashii, H.; Hazumi, M.; Hinz, L.; Hokuue, T.; Hoshi, Y.; Hou, S.; Hou, W.-S.; Iijima, T.; Imoto, A.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kang, J.H.; Kang, J.S.; Kapusta, P.; Katayama, N.; Kawai, H.; Kawasaki, T.; Khan, H.R.; Kichimi, H.; Kim, H.J.; Kim, S.M.; Kinoshita, K.; Korpar, S.; Križan, P.; Krokovny, P.; Kulasiri, R.; Kumar, S.; Kuo, C.C.; Kuzmin, A.; Kwon, Y.-J.; Leder, G.; Lee, S.E.; Lesiak, T.; Li, J.; Limosani, A.; Lin, S.-W.; Liventsev, D.; MacNaughton, J.; Majumder, G.; Mandl, F.; Matsumoto, T.; Matyja, A.; Mikami, Y.; Mitaroff, W.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Mizuk, R.; Nagamine, T.; Nagasaka, Y.; Nakamura, I.

doi:10.1103/PhysRevLett.95.241801

research article

Determination of |Vub| from measurements of the inclusive charmless semileptonic partial rates of B mesons using full reconstruction tags

Bizjak, I.

•

Abe, K.

•

Aihara, H.

2005

Physical Review Letters

We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element data collected by the Belle detector at the KEKB e+e-asymmetric collider. Events are tagged by fully reconstructing one of the B mesons, produced in pairs from Υ(4S). The signal for b→u semileptonic decay is distinguished from the b→c background using the hadronic mass MX, the leptonic invariant mass squared q2 and the variable P+≡EX-|p→X|. The results are obtained for events with pℓ*≥1GeV/c, in three kinematic regions (1)MX<1.7GeV/c2, (2)MX<1.7GeV/c2 combined with q2>8GeV2/c2, and by (3)P+<0.66GeV/c. The matrix element |Vub| is found to be (4.09±0. 19±0.20-0.15+0.14±0.18)×10-3, where the errors are statistical, systematic including Monte Carlo modeling, theoretical, and from shape function parameter determination, respectively. © 2005 The American Physical Society.